3.  ATMS CONTROLLERS AND 334 CABINETS

20                     ITEM 20. 170E CONTROLLER

                        20.1      DESCRIPTION.  Work under this item shall consist of furnishing controllers and delivering the assemblies to the Department for testing.

                        20.2      MATERIALS.  Each Processor Assembly shall consist of the following items conforming to the requirements specified herein:

       Definitions:  The following definitions and abbreviations shall apply to these items:

• ACIA - Asynchronous Communications Interface Adapter Device, Motorola MC6850 or equal
• Cabinet - An outdoor enclosure for housing the controller unit and associated equipment
• Channel - An information path from a discrete input to a discrete output
• CMOS - Complementary Metal Oxide Semiconductor
• Component - A component shall be defined as any electrical or electronic device
• Controller Unit - That portion of the controller assembly devoted to the operational control of the logic decisions programmed into the assembly
• CPU - Central Processing Unit
• CR - ACIA Control Register
• DTA - Down Time Accumulator
• EG - Equipment Ground
• EPROM - Ultraviolet Erasable Programmable Read Only Memory Device
• ETL - Electrical Testing Laboratories, Inc.
• HEX - Hexadecimal
• Hz - Hertz
• LED - Light Emitting Diode
• ma - Milliampere
• MODEM - Modulate/Demodulate Unit
• Module - A functional unit that plugs into an assembly
• Motherboard - A printed circuit connector interface board with no active or passive components
• MOS - Metal Oxide Semiconductor
• MPU - Motorola 6800 microprocessor device (or equal)
• PLA/PAL - Programmable Array Logic Device
• RDR - ACIA Receiver Data Register
• ROM - Read Only Memory Device
• RTC - Model 170 Controller Unit Real Time Clock.  This circuitry provides a 170 CPU IRQ Interrupt pulse clocked off of the local power company's line frequency every 16.67 ms
• RTCA - Real Time Clock Adjustor Circuitry
• RTS - Request To Send
• R/W - Model 170 Controller Unit Read/Write Control Line
• SCI - Serial Communications Interface
• SR - ACIA Status Register
• SRAM - Static Random Access Memory Device
• SW - Switch
• TDR - ACIA Transmit Data Register
• TTL - Transistor-Transistor Logic
• VMA - Valid Memory Address
• Watchdog Timer (WDT) - A monitoring circuit, external to the Controller Unit, which senses a Controller Unit Output Line

        General Interchangeability: The following assemblies and their respective associated devices shall electrically and mechanically intermate and be compatible with each other:

Assemblies		Associated Devices
Input File		Model 222 Detector Modules Model 242 Isolation Modules
Power Distribution Assembly #3		Model 206 Power Supply Module Model 200 Switch Pack Model 208 Monitor Unit Model 430 Heavy Duty Relay
Model 170 Controller Unit		Cabinet Housing Model 412C Program Module Model 400 Modem

                                    20.2.1   All indicators and character displays shall have a minimum +/- 45 degrees cone of visibility with its axis perpendicular to the front panel.  All indicators and character displays shall be readily visible at a radius of up to 4 feet within the cone of visibility when the indicator is subjected to 9,000 footcandles of white light with the light source at 45 +/- 2 degrees to the front panel.  If characters are not self-luminous, illumination shall be provided for viewing in low levels of ambient light.  Indicators supplied on equipment requiring handles shall be mounted such that a horizontal clearance of 15 degrees minimum shall be provided.  All indicators and character displays shall have a rated life of 100,000 hours minimum.  Liquid crystal displays (LCD) shall operate at temperatures of -20^o to +70^oC without loss of visibility or bleeding.

                                    20.2.2   The TYPE T Connector shall be a single row, 10 position, feed through terminal block.  The terminal block shall be a barrier type with 6-32, 0.25 inch, or longer, nickel plated brass binder head screws.  Each terminal shall be permanently identified as to its function.

                                    20.2.3   The mating connectors shall be designated as the connector number and male/female relationship such as C1P (plug or PCB edge connector) and C1S (socket).

                                    20.2.4   Connectors C1, C2, and C6 shall conform to the following requirements:

                          •           Pin and socket contacts for Connectors C1, C2, and C6 shall be beryllium copper construction subplated with 0.00005 inch nickel and plated with 0.00003 inch gold.  Pin diameter shall be 0.062 inch.  Connectors shall have the following number of contacts:

                                                            C1 - 104 contacts

                                                            C2 - 14 contacts

                                                            C6 - 24 contacts

                          •           All pin and socket connectors of C1, C2, and C6 shall use the AMP #601105-1 or #91002-1 contact insertion tool, and the AMP #305183 contact extraction tool.

                          •           Connector C1 and C2 blocks shall be constructed of phenolic or equal and shall have an insulation resistance of 5000 megohms.  The contacts shall be secured in the blocks with stainless steel springs.

                          •           Connector C1 and C2 corner guides shall be stainless steel.  The guide pins shall be 1.097 inches in length and the guide sockets 0.625 inch in length.

                          •           Connector C6 shall be circular plastic type with quick connect/disconnect capability and thread assist, positive detente coupling.  The connectors shall be US listed Glass Filled Nylon, 94 V-I Rated, heat stabilized, fire resistant.

                                    20.2.5   PCB edge connectors shall have bifurcated gold plated contacts, and shall conform to the following requirements:

                          •           The PCB receptacle connector shall meet or exceed the following:

                                                            Operating Voltage:                                600 VAC (RMS) at sea level

                                                            Current Rating:                                     5 amperes

                                                            Insulation Resistance:                            5,000 megohms

                                                            Contact Material:                                   Copper alloy plated with 0.00005 inch of nickel and 0.000015 inch of gold

                                                            Contact Resistance:                               0.006 ohm maximum

                          •           The PCB 22/44 Connector shall have 22 independent contacts per side, dual sided with 0.156 inch contact centers.

                          •           The PCB 28/56 Connector shall have 28 independent contacts per side, dual sided with 0.156 inch contact centers.

                          •           The PCB 36/72 Connector shall have 36 independent contacts per side, dual sided with 0.1 inch contact centers.

                                    20.2.6   Metals shall conform to the following requirements:

                          •           Aluminum

                                                            -           Sheet shall be Type 5052-H32 ASTM Designation B209.

                                                            -           Rod, Bar, and Extruded shall be Type 6061-T6, or equal.

                          •           Stainless Steel Sheet shall be annealed or one-quarter-hard complying with the ASTM Designation:  A666 for Type 304, Grades A or B, stainless steel sheet.

                          •           Cold Rolled Steel

                                                            -           Sheet, Rod, Bar, and Extruded shall by Type 1018/1020.

                                                            -           Plating - All cold rolled steel shall be plated.  All plating shall be either cadmium plating meeting the requirements of Federal Specification QQ-P-416C, Type 2 Class 1 or zinc plating meeting the requirements of Federal Specification QQ-Z-325B, Type 2 Class 1.

                          •           All sharp edges and corners shall be rounded.

                                                Memory, MPU, and ACIA devices shall be socket mounted on the PCB's. (MPU = Motorola 6800 microprocessor device, or equal; ACIA = Asynchronous Communications Interface Adaptor Device.)

                                    20.2.7   Assemblies and PCB Design shall conform to the following:

                          •           All assemblies shall be easily replaceable and incorporate plug-in capability for their associated devices or PCBs with the following exceptions:

                                                            -           The cabinet power supply.

                                                            -           Motherboard assemblies.

                                                            -           The power supply for the Model 170 may be a plug-in assembly.

                          •           Assemblies shall be provided with 2 guides for each plug-in PCB or associated device (except relays).  The guides shall extend to within 0.75 inch from the face of either the socket or connector and front edge of the assembly.  If nylon guides are used, the guides shall be securely attached to the file or assembly chassis.

                          •           PCB - No components, traces, brackets, or obstructions shall be within 0.125 inch of the board edge (guide edges).

                          •           The manufacturer's name or logo, model number, serial number, and circuit issue or revision number shall appear and be readily visible on all items.  Placement of this information for modules such as the Model 400 MODEM, Model 208 Monitor Units, Model 412C Program Module shall be on the PCB.

                                    20.2.8   Model Numbers shall conform to the following:

                          •           The manufacturer's model number, serial number and circuit issue or revision number shall appear on the rear panel of all equipment and modules supplied.

                          •           In addition to any assignment of model numbers by the manufacturer, a model number assigned in the table below shall be displayed on the front panel in bold type, at least 0.25 inch high.

MODEL #		TITLE
170 412C 206 200 208 222 242 400		CONTROLLER UNIT - DUAL ACIA PROGRAM MODULE POWER SUPPLY MODULE SWITCH PACK MONITOR UNIT DETECTOR MODULE ISOLATION MODULE MODEM

                                    20.2.9   All PCB connectors mounted on a motherboard shall be mechanically secured to the chassis or frame of the unit.

                                    20.2.10 All screw type fasteners shall utilize locking devices or locking compounds except for finger screws which shall be captive.

                                    20.2.11 Tolerances - The following tolerances shall apply, except as specifically shown on the plans or in these specifications:

                                                Sheet Metal      +/- 0.0525 inch

                                                PCB                 +0, -0.010 inch

                                                Edge Guides      +/- 0.015 inch

                        20.3      ELECTRICAL ENVIRONMENTAL, AND TESTING REQUIREMENTS

                                    These test procedures shall be followed by the who shall certify that he has conducted inspection and testing in accordance with these specifications.

                                    20.3.1   Inspection - A visual and physical inspection shall include mechanical, dimensional, and assembly conformance of all parts of these specifications which can be checked visually or manually with simple measuring devices.

                                    20.3.2   Environmental - All components shall properly operate within the following limits:

• Ambient Temperature:  -37^o to 74^o C
• Humidity:  5 to 95 percent
• The relative humidity and ambient temperature values in the following table shall not be exceeded.

AMBIENT TEMPERATURE VERSUS RELATIVE HUMIDITY AT BAROMETRIC PRESSURES (29.92 In. Hg.)
Ambient Temperature/ Dry Bulb (in o C)		Relative Humidity (in percent)		Ambient Temperature/ Wet Bulb (in o C)
-37 to 1.1 1.1 to 46.0 48.8 54.4 60.0 65.4 71.2 74		10 95 70 50 38 28 21 18		-17.2 to 42.7 42.7 42.7 42.7 42.7 42.7 42.7 42.7

• Shock Test - per Military Specification:  MIL-STD-810D Method 516.1.
• Vibration - per Military Specification:  MIL-STD-810D Method 514.1, equipment class G (Common Carrier)
• Cabinets shall comply with the requirements of UL Bulletin of Research No. 23, “Rain Tests of Electrical Equipment”.

       All equipment shall continue normal operation when subjected to the following:

• Low Temperature Test - With the item functioning at a line voltage of 90 VAC in its intended operation, the ambient temperature shall be lowered from 20^o C to ‑37^oC at a rate of not more than 18^o C per hour.  The item shall be cycled at -37^oC for a minimum of 5 hours and then returned to 20^o C at the same rate.  The test shall be repeated with the line voltage at 135 VAC.
  
• High Temperature Test - With the item functioning at a line voltage of 90 VAC in its intended operation, the ambient temperature shall be raised from 20^o C to 70^o C at a rate of not more than 18^o C per hour.  The item shall be cycled at 70^o C for 5 hours and then returned to 20^o C at the same rate.  The test shall be repeated with the line voltage at 135 VAC.

          Electrical - All components shall operate properly within the following limits:

• Applied Line Voltage:  90 to 135 VAC
• Frequency:  60 (+/- 3.0) Hertz
• All circuits unless otherwise noted, shall commence operation at or below 90 VAC as the applied voltage is raised from 50 VAC to 90 VAC at a rate of 2 (+/- 0.5) volts per second.

                                    20.3.3   All equipment and resident programming, when housed within its associated cabinet, shall be unaffected by transient voltages normally experienced on commercial power lines.  Equipment purchased separately from cabinet will be tested for compliance with the equipment housed within an accepted cabinet and the cabinet connected to the commercial power lines.  The power line surge protection (including the cabinet's and that internal to the equipment) shall enable the equipment being tested to withstand (nondestructive) and operate normally following the discharge of a 25 microfarad capacitor, charged to plus and minus 2,000 volts, applied directly across the AC line (applied at Cabinet Service Terminal Block) at a rate of once every 10 seconds for a maximum of 50 occurrences per test.  The unit under test will be operated at 20^o (+/- 5^o) C and at 120 (+/- 12) VAC.

                                    20.3.4   All equipment shall be unaffected by transient voltages normally experienced on commercial power lines.  Equipment purchased separately from the cabinet will be tested for compliance as follows:

                          •           Power from commercial power lines applied at Cabinet Service Terminal Block.

                          •           Equipment properly housed and connected within an accepted cabinet.

                          •           The Cabinet Power Surge Protectors deactivated or removed.

                          •           The equipment shall withstand (nondestructive) and operate normally when one discharge pulse of plus or minus 300 volts is synchronously added to the AC power into the power distribution assembly and moved uniformly over the full wave across 360 degrees or stay at any point of Line Cycle once every second.  Peak noise power shall be 5 kilowatts with a pulse rise time of 500 ns.  The unit under test will be operated at 20^o (+/-5^o) C and at 120 (+/-12) VAC.

                          •           Within the circuit of any device, module, or PCB, electrical isolation shall be provided between DC logic ground, equipment ground and the AC grounded conductor.  The DC logic ground and equipment ground shall be electrically isolated from the AC grounded conductor and from each other by 500 megohms, minimum, when tested at the input terminals with 500 VDC.

                                    20.3.5   All equipment shall be capable of normal operation following opening and closing of contacts in series with the applied voltage to the cabinet at a rate of 30 openings and closings per minute for a period of 2 minutes in duration.

                                    20.3.6   All equipment shall resume normal operation following a period of at least 5 hours at -37^o C and less than 10% humidity, when 90 VAC is applied to the input terminals of the cabinet.

                                    20.3.7   Contractor's Testing Certification: The contractor shall supply with each shipment a full test report of the quality control and final test conducted on each item.  The test report shall indicate the name of the tester and shall be signed by a responsible manager.  The contractor shall submit his quality control procedure and format of test reports to the engineer for approval within 15 days following the approval of the contract.  The quality control procedure shall include the following:

• Acceptance testing of all supplied components.
• Physical and functional testing of all modules
• A minimum 100-hour burn-in of all modules.
• Physical and functional testing of all items.
• A minimum 24 hour operation of all controller units and cabinets.

                        20.4      MODEL 170E CONTROLLER UNIT

                                    Each 170E controller unit will consist of the following:

• Central Processing Unit (CPU)
• Downtime Accumulator
• Input/Output Interface
• Unit Chassis
• Unit Power Supply with external power connection
• Unit Standby Power Supply
• Front Panel Assembly
• Internal System Interface
• Connectors C1S, C2S, and T-1
• Communications System Interface
• Model 412C Program Module

                                    20.4.1   The composition weight shall not exceed 25 pounds.

                                    20.4.2   Power Failure - A power failure is said to have occurred when the incoming line voltage falls below 92 (+/-2) VAC for 50 ms.  The determination of the 50 ms interval shall be completed within 67 ms of the time the voltage falls below 92 (+/-2) VAC.

                                    20.4.3   Power Restoration - Power is said to be restored when the incoming line voltage equals or exceeds 97 (+/-2) VAC for 50 ms.  The determination of the 50 ms interval shall be completed within 67 ms of the time the voltage first reaches 97 (+/-2) VAC.

                                    20.4.4   The hysteresis between power failure and power restoration voltage settings shall be a minimum of 5 volts with a threshold drift of no more than 0.2 VAC.

                                    20.4.5   General system address organization of the model 170 shall be as listed below.  The internal module address organization shall be as specified in the appropriate module section.

FUNCTION		ADDRESS RANGE		COMMENTS
CPU SRAM RESERVED U4 MEMORY DTA MINUTES INPUT/OUTPUT RESERVED DTA SECONDS RESERVED ACIA1 ACIA1 ACIA2 ACIA2 RESERVED PROGRAM MODULE - MEMORY WRITE PROTECT I.D. FEATURE I.D. LOCATION MPU/MIC INTERFACE RESERVED RTCA VALID/RESET RTCA COUNTERS 1 TO 4 U3 MEMORY U1 & U2 MEMORY		0000 - 07FF 0800 - 0FFF 1000 - 4FFF 5000  READ 5001 - 500A 500B - 500E 500F  READ 5010 - 5FFE 6000 6001 6002 6003 6004 - 6FFF 7000 7000 7001 7001 7002 7003-7009 700A 700B - 700E 700B - 700E 7010 - 7FFF 8000 - FFF		5000 WRITE RESET DTA 50001 BIT 1 INPUT ASSIGNED TO RESTART TIMER.  5009 & 500A READ RESERVED. WRITE CR, READ SR WRITE CR, READ SR WRITE TDR, READ RDR WRITE CR, READ SR WRITE TDR, READ RDR WRITE READ READ WRITE RESERVED READ WRITE RESERVED FUNCTION 700F RESERVED

                                    20.4.6   Address locations noted as “RESERVED” are assignable by the State only and shall not be used.

                                    20.4.7   The total memory access time including buffering, decoding, device access time and accessed data presented to the controller unit data bus shall not exceed 300 ns.  The memory device shall have read and write (if applicable) time suitable to perform either function in one MPU instruction cycle.

                                    20.4.8   Each memory device shall stabilize to normal operation within 10 ms following Power Restoration and shall be in Standby until addressed.  Each device shall have the following maximum power drain at +5 VDC in its various states:

Memory		Active		Standby		Powerdown
EPROM SRAM		100ma 70ma		40ma 20ma		-- 100 ua (non-internal power)

                                    20.4.9   All memory sockets shall be a 28 pin AUGUT #528/828 Series - AG10DPC or equal except CPU SRAM which shall be a 24 Pin.  Each socket number shall be permanently marked on the PCB adjacent to its Pin 1.

                                    20.4.10 If a PAL, EPROM, or ROM device is used in address decoding and timing algorithms, the device code listing together with data sheet(s) and any specific coding requirements shall be included in the unit or module documentation.  The device coding shall be delivered in the same form that the contractor uses to directly reproduce the device.

                                    20.4.11 Central Processing Unit (CPU):  The CPU shall be provided with an MPU and shall properly execute object programs developed to operate on the MPU.  The MPU interrupt requirements shall be as follows:

                          •           Non-Maskable Interrupt (NMI) - The NMI is exclusively assigned to the Power Failure Function.  A power failure shall cause the MPU NMI line to immediately go LOW.  The line shall be held LOW until the RES goes LOW to prevent multiple NMI issuance.

                          •           Reset Interrupt (RES) - The RES is exclusively assigned to Power Restoration and MPU Startup.  The RES line shall go LOW 3 (+/-1) ms following the NMI going LOW.  The line shall remain LOW until 150 (+/-75) ms after Power Restoration.

                          •           Interrupt Request (IRQ) - The IRQ Line shall be jointly used by the RTC and ACIA 1 & 2 to initiate IRQ to the MPU.

                          •           Real Time Clock (RTC) - Real Time Clock circuitry shall be provided to trigger an interrupt to the MPU on the IRQ line once every 1/60 of a second during the 0' to 150' portion of the negative portion of the AC Sine Wave.  The AC Sine Wave shall be derived from the local power company's 120 VAC 60 Hz frequency.  The RTC shall be reset by a WRITE to Address 5FFF.

                          •           ACIA - An ACIA shall be provided capable of receiving and transmitting up to eight-bits of parallel data from the MPU for serial data communications.  The ACIA shall have 4 registers which are addressable by the MPU.  The MPU shall be capable of reading the Status Register (SR) and the Receiver Data Register (RDR), and writing in the Transmit Data Register (TDR) and in the Control Register (CR).

                                                20.4.11.1           CPU Clock Timing - The CPU clock circuitry shall be provided to generate the MPU clock timing.  The clock circuitry and the MPU shall provide a MPU machine cycle time of 0.651 (+/-0.0015) us using a 6.144 MHz crystal, and 1.331 (+/-0.0015) us using a 3.072 MHz crystal.  All units shall be delivered with a socket mounted 6.144 MHz crystal installed.  The CPU clock circuitry shall be located no further than 2 inches from the MPU clock pin inputs.

                                    20.4.12 Downtime Accumulator (DTA): - A DTA shall be provided to accumulate time between Power Failure and Restoration.  The DTA shall start counting immediately upon Power Failure and continue counting until the RES line goes HIGH following Power Restoration.

                                                20.4.12.1           The DTA shall have 2 eight-bit binary registers counting the number of minutes and seconds.  DTA accuracy shall be +/-1 second over the 255 minute range.  The DTA shall stop counting when the Minutes register equals 255 decimal.  Both DTA registers shall reset to 0 by a WRITE to Address 5000.  The DTA shall READ Minutes at Address 5000 and Seconds at Address 500F.  The Seconds Register shall count 0 to 59 seconds decimal in 1 second increments.  At 60 seconds, the Minutes Register shall be incremented and the Seconds Register reset to “0”.

                                                20.4.12.2           SRAM Memory of 2,048 eight-bit words shall be provided.

                                                20.4.12.3           Restart Timer - A Restart Timer Circuitry shall be provided to react to the duration of power outage.  The Restart Timer output state is normally HIGH.  When the NMI line goes LOW, the Restart Timer shall begin timing.  If the timer reaches 1.75 (+/-0.25) seconds, its output state shall go to LOW and remain in that state for 50 (+/-24) ms after the RES line goes HIGH.  If power is restored prior to the timer timing out, the output shall remain HIGH and the timer shall be reset to “0”.

                                                20.4.12.4           Total current drain for DTA and Restart Timer Circuitry and SRAM (powerdown mode) shall not exceed 2 ma at 4 VDC, 35^oC.

                                    20.4.13 Input/Output Interface: - Input/Output Interface shall utilize a ground true logic.  The transfer of data between interface and working registers within the MPU shall be in eight-bit word increments, minimum.  The steering of data from inputs or outputs for a given address shall be controlled by the state of MPU read/write command at the time the given address is valid.

                                                20.4.13.1           Output Interface - The output interface shall consist of a minimum of 80 bits of buffered storage.  Output data shall be latched at the time of writing from the MPU.  This interface shall provide an NPN open collector output capable of driving up to 40 VDC and sinking up to 100 ma.  A “1” from the MPU shall be presented as a grounded collector, and a “0” presented as an open circuit.  Once a port is written into the data shall remain present and stable until either another word is written into it or until the power is turned off.  The state of these output ports at the time of power up or below power failure threshold shall be an open circuit.

                                                20.4.13.2           Input Interface - The input interface shall consist of a minimum of 64 bits of gated inputs from external devices.  Each logic level input shall be turned ON (true) when the input voltage is less than 3.5 VDC, shall be turned OFF (false) when the input current is less than 100 ua or the input voltage exceeds 8.5 VDC, shall pull up to 12 VDC, and shall not deliver in excess of 20 ma to a short circuit to logic level common.  Then the appropriate input address is impressed upon the input interface, the interface shall place its data on the data bus, which will be read by the MPU.  Ground on any input shall be interpreted by the MPU as a “1” and an open on any input or the presence of a voltage greater than 8.5 VDC shall be interpreted as a “0” by the MPU when that input is read.

                                    20.4.14 Unit Chassis: The controller unit shall be housed in a compact, portable metal enclosure suitably protected against corrosion.  The controller unit shall mount in a standard EIA 19 inch rack.  The enclosure shall be designed for convenient removal of PCBs without use of tools.  When the controller unit is equipped with a fan, thermal overload protection for the fan shall be provided.

                                    20.4.15 Unit Power Supply:  A power supply shall be provided to produce all DC power necessary to operate the controller unit.  In addition, the supply shall provide the following voltages and current:

                                                            1000 ma at +12 VDC

                                                            300 ma at -12 VDC

                                                            500 ma at +5 VDC

                                                            400 ma at -5 VDC

                                                20.4.15.1           The DC ground shall not be connected to equipment ground.

                                                20.4.15.2           Controller Unit power shall be held up (DC logic voltages at normal operating levels) for a minimum of 50 +/-17 ms beyond the NMI line going LOW.

                                                20.4.15.3           The maximum DC voltage generated shall not exceed 45 volts.

                                                20.4.15.4           The Power Supply shall be so designed that no further filtering regulation is needed for the required DC voltages.

                                                20.4.15.5           If a switching power supply is used, radio frequency suppressers shall be provided on the AC+ and AC- power lines.

                                    20.4.16 Unit Standby Power Supply: A standby power supply shall be provided to retain power to the CPU Restart Timer, DTA and SRAM during power failure in the controller unit.  The supply shall consist of holdup batteries, battery recharge circuitry and power sense/transfer circuitry.

                                                20.4.16.1           The power sense/transfer circuitry shall sense power loss and transfer battery power immediately to the required circuits.  The transfer circuitry shall isolate the batteries by transistor or relay until power loss transfer.  The circuitry shall sense power restoration and transfer back to the normal battery isolation mode.

                                                20.4.16.2           The standby batteries shall be a Standard “D” cell size, sealed, fast rechargeable, lead-acid, gel-cell type rated at 2.5 ampere-hours, 2 VDC.  They shall be securely installed inside the controller unit chassis and easily accessible.  The cells shall be tab type with the batteries delivered with the “+” terminal connector disconnected.

                                                20.4.16.3           A battery charging circuit shall be provided which shall, under normal operating conditions, fully recharge and float the standby battery consistent with battery manufacturer's recommendations.  An indicator, located on the front panel, shall be illuminated when the battery charging current exceeds 75% of the maximum charging rate specified by the battery manufacturer.

                                    20.4.17 Front Panel Assembly: The front panel shall be securely fastened to the chassis and removable without the need for tools.  A continuous hinge shall be provided on the left side of the unit to permit opening of the front panel and ready access to the interior of the controller unit.

                                                20.4.17.1           The front panel shall be electrically connected by means of Connector C3.  The front panel shall be connected to equipment ground through Connector C3.

                                                20.4.17.2           The character displays shall be hexadecimal with circuits to accept, store, and display four-bit binary data.  The characters shall be 0.40 inch high, minimum.  Each character shall have latch strobe and blanking inputs.  The second character from the right (lower row) shall have a right decimal point.   The face of the character display shall be scratch and solvent-resistant.  The transfer of data from the MPU through the output interface to the display shall result in the display of each character in its non-inverted state.

                                                20.4.17.3           The front panel shall be provided with 10 LED CALL/ACTIVE indicators.

                                                20.4.17.4           A keyboard shall be provided.  The transfer of data from the keyboard by way of the input interface to the MPU shall result in each character being received in its non-inverted state.  The character shall consist of 4 bits of binary data, while the character control shall consist of 1 bit.  A low state on the character control to the interface shall indicate the presence of a valid character.  Each key shall be engraved or embossed with its function character, shall have a minimum surface area of 0.075 square inch and shall be mounted on a minimum of 0.50 inch centers; shall have an actuation force between 50 and 100 grams and shall provide a positive tactical indication of contact.  Key contacts shall have a design life of over one million operations, shall be rated for the current and voltage levels used, and shall stabilize within 5 ms following contact opening.

                                                20.4.17.5           The front panel shall be provided with a toggle LOGIC switch to enable the stop timing function and shall be labeled “STOP TIMING”.

                                                20.4.17.6           An ON-OFF toggle CONTROL switch and fuse shall be provided for AC power.  The switch and fuse shall protrude through the front panel, but not be attached (remain with the controller unit chassis when the front panel is removed).  The fuse shall be a 3AG Slow Blow type, rated at either 1 or 2 amperes, dependent upon the controller unit power requirements.

                                                20.4.17.7           The front panel, under the legend “OPERATING INSTRUCTIONS”, shall include a framework to retain a card, 4 inches wide by 6 inches high by 0.0625 inch thick.

                                    20.4.18 Internal System Interface: Lateral spacing shall be a minimum of 1.0 inch from the PCB surface to any component or surface for the Model 400 Module and 0.75 inch for the Program Module.  Continuous nylon card guides (permanent locking type) shall be provided for the modules and all internal PCBs.

                                                20.4.18.1           A PCB 22/44S Connector shall be provided for the Model 400 Module and a PCB 36/72S Connector shall be provided for the Program Module.

                                                20.4.18.2           The depth placement of the vertical M/170 Connector shall be such that the Program Module Front Panel shall be flush with the Model 170 Controller Unit Front Panel when the module is connected.

                                    20.4.19 Data and Address Bus Requirements : All Data Bus Buffers and Data Bus Drivers shall be tri-state buffered devices enabling them to drive a load consisting of 10 TTL gates and 200 picofarads.  The propagation delay time shall be less than 30 ns.  All Address Bus Inputs shall be buffered and shall load the bus by 1 TTL gate load and 100 picofarads.

                                    20.4.20 Connector Requirements: Connector C1S shall be mounted on the controller unit providing 44 inputs and 56 outputs of control interface to and from external devices or files.

                                                20.4.20.1           The Model 400 MODEM and CPU ACIA connections into and out of the controller unit shall be made through Connector C2S and Terminal Block T-1 (TYPE T Connector).  The control and data transmission lines shall be paralleled through both connectors.

                                    20.4.21 Communication System Interface : The communication system shall consist of the CPU, ACIA, motherboard connectors and lines, Model 400 MODEM Module and interfaces between ACIA & MODEM and both MODEM and ACIA to C2S Connector/T-1 Terminal.  The interface between the ACIA and MODEM shall comply with EIA RS-232-C Standards and all functions under T-1 and C2 Connectors are referenced to the MODEM.  The RTS and TX Data lines to the MODEM shall have MARK and SPACE Voltages of -12 and +12 VDC respectively.

                                                20.4.21.1           A second C20S Connector shall be furnished on the back plate adjacent to C2S Connector and shall be interconnected to the ACIA2.  Both connectors shall be pin assigned as follows:

CONTACT		FUNCTION		CONTACT		FUNCTION
H J K L M		CARRY DETECT REQUEST TO SEND DATA IN (FROM ACIA) CLEAR TO SEND		N P                                  R		DC GROUND +12 VDC -12 VDC
C2S also has:
A B C		AUDIO IN AUDIO IN AUDIO OUT				+5 VDC AUDIO OUT -5 VDC

                                                20.4.21.2           Should the Model 170 Unit provide a slot for a second Model 400 MODEM and AUDIO pin assignments for C20 would match C2.

                                                20.4.21.3           It shall be possible to configure each ACIA independently using removable jumpers for bit rates of 1.2, 2.4, and 9.6 kbps.  Both ACIA's shall be configured on delivery for 1.2 kbps.

                                                20.4.21.4           Electrical Requirements: Electrical requirements shall conform to the following:

                          •           The front panel and chassis shall be connected to equipment ground.

                          •           A surge arrestor shall be provided between the AC+ and AC- for protection against powerline noise transients.  The surge arrestor shall meet the following requirements:

                                                                                    - Recurrent peak voltage:                       212 Volts

                                                                                    - Energy rating maximum:                      20 Joules

                                                                                    - Power dissipation, average:                  0.85 Watt

                                                                                    - Peak current for pulses less

                                                                                      than 6 us:                                            2000 Amperes

                                                                                    - Standby current:                                  less than 1 ma

                          •           Two 0.5 ohm, 10 watt wire-wound power resistors with a 0.2uH inductance shall be provided (1 on the AC+ power line and 1 on the AC- line).  Three surge arresters rated for 20 Joules shall be supplied between AC+ and AC- coming off the 0.5 Ohm resistor going to the surge arresters.

                          •           The AC power to the controller unit shall be supplied by a 3 conductor cable at least 3 feet in length.  The cable shall terminate in a NEMA Type 5-15P grounding type plug.

                          •           Test points shall be provided for monitoring all power supply voltages.  All test points shall be readily accessible when the front panel is opened.  Any provided test point shall be isolated such that attaching a test probe shall not impact the operation of the controller unit.  The test points shall be post type, 0.0625 inch diameter and 0.1875 inch high, minimum.  The clearance between test points and other components shall be 0.25 inch, minimum.

                                    20.4.22 Model 412C Program Module: The unit shall be provided with a 412C program module. The module shall conform to the following requirements:

                                                20.4.22.1           A device shall be provided to prevent the module, when inserted upside down, from making contact with the module's mating connector within the controller unit.

                                                20.4.22.2           The module PCB Connector shall be provided with electrostatic discharge protection to prevent CMOS device damage.

                                                20.4.22.3           The VMA/Phase 2 (E) Clock Signal (M/170 Pin 25) shall not be used in a memory device READ operation.

                                                20.4.22.4           The total module current requirements shall not exceed 450 ma at +12 VDC and 100 ma at +5 VDC.

                                                20.4.22.5           Address 700E, Bit 8 shall permanently Read as “1”.

                                                20.4.22.6           The module PCB connector shall be a PCB 36/72P.

                                                20.4.22.7           The module front panel shall be connected to Equipment Ground at M/170 Pin 34.

                                                20.4.22.8           All addressable devices shall be fully decoded.

                                                20.4.22.9           All data lines shall be tri-state buffered on the module enabling them to drive a load consisting of 10 TTL gates and 200 picofarads.  When this module is not being addressed, the data output lines shall be disabled into a high impedance state and the data lines shall not source or sink more than 100 ua.

                                                20.4.22.10         All addressed input lines shall load the bus by 1 TTL gate load and 100 picofarads.  The propagation delay time shall be less than 30 ns.

                                                20.4.22.11         The 412C shall be configured with 4 standard 28 pin JEDEC pinout sockets that incorporate dual wiping contacts and meet the requirements of the EIA RS415 specifications.  The four sockets shall be labeled U1, U2, U3, and U4 and shall meet the requirements of the table below:

Sockets	Device	Size	Address Range
U1 U2 U3 U4	EPROM RAM Not populated RAM	32 Kbytes 8 Kbytes 4 Kbytes 8 Kbytes	$8000 - $FFFF $3000 - $4FFF $7010 - $7FFF $1000 - $2FFF

                                                20.4.22.12         The EPROM shall be an Intel 27256 or equivalent and shall be provided in place on the memory module.  The RAM shall be an Hitachi 6264 or equivalent, and shall be provided in place on the memory module.

                                                20.4.22.13         Jumper positions for Sockets U2 and U4 shall be provided to convert the sockets from an EPROM socket to a SRAM socket or vice versa.  Jumper positions for Sockets U2, U3, and U4 shall be provided to convert the socket from a nonstandby power socket to a standby power socket or vice versa.  Sockets U2 and U3 shall be jumpered for nonstandby power.  Socket U4 shall be jumpered for standby power.

                                                20.4.22.14         A Write Protect Circuit (WPC) shall be provided to prevent writing to SRAM memory during the Controller Unit MPU RESET Interrupt Line in a LOW State.  A WRITE to ADDRESS $7000 shall be decoded and shall deactivate the WPC to allow the R/W function.  The WPC state shall be brought out to Address $700E, Bit 7 (“1” State means “active”).  The WPC power drain shall not exceed 40 ua at +5 VDC.

                                                20.4.22.15         A power supply shall be provided onboard the module consisting of a DC Regulation Circuit, Standby Power and all necessary support circuitry.

                                                20.4.22.16         A DC Regulator device with its circuitry shall be provided to reduce the +12 VDC to +5 VDC for module use.  The Regulator shall have a minimum efficiency of 75% and provide +5 +/-0.25 VDC from no load to full load with a maximum of 2% ripple.

                                                20.4.22.17         Standby power shall be provided to hold up WPC, SRAM, and RTCA circuits during a Model 170 Controller Unit Power Failure.  A circuit shall be provided to sense the +12 VDC M/170 power line and switch to standby power when the line falls below +9 VDC.  The standby power circuit shall switch off when the power line is greater than +11 VDC.  The standby power shall be a standard “AA” cap terminal cell battery rated at a minimum of 1.6 ampere-hours at 3.7 +/-0.2 VDC.  All module circuitry and devices shall not exceed a maximum power drain of 2 ma at 3.7 VDC on the Standby Battery.

                                                20.4.22.18         The battery shall be delivered separate from the module.  It shall not be used except for test loading check by the contractor.

                                                20.4.22.19         A battery holder for an “AA” battery shall be provided securely mounted to the back of the front panel.  The holder shall have a tab header type connector attached to the battery plus mounting terminal.

                                                20.4.22.20         Two identification switch packages and associated circuitry shall be provided.  The switch packages shall be decoded at Address $7000 (features) and $7001 (locations).  Each package shall have 8 SPST switch positions with each switch associated to a DATA Bit (Switch 1 to Bit 1 and so on).  Switch ON shall denote bit state “1” to the 170 CPU and switch OFF shall denote bit state “0” to the 170 CPU.

                                                20.4.22.21         The Switch Package shall be a DIP slide type and shall have recessed switches to prevent accidental switching.

                                                20.4.22.22         An RTCA shall be provided to adjust for missing RTC timing interrupts.

                                                20.4.22.23         The RTCA shall be continuously powered and not affected by a controller unit power failure.  RTCA accuracy shall be +/-10 ppm at 25^oC.  Integral devices incorporating RTCA features and functions may be used in lieu of individual components.  The RTCA current drain shall not exceed 1.5 ma at +3.7 VDC.

                                                20.4.22.24         The RTC shall include a free running 60 Hz Pulse Generator (PG), a 24 bit binary counter counting 60 Hz pulses, 4 eight-bit buffer ports and port decode/PG interrupt logic.  The PG shall trigger binary counter to increment on every input pulse, counting continuously until reset to 0 by its Reset Line.  Bits 21, 22,23, and 24 in an all “1” state shall cause that PG to be disabled (Binary Counter Bit 1 is the least significant bit).

                                                20.4.22.25         The counter bits shall be continuously read out to 4 eight-bit buffer ports.  The ports shall be addressed and bits assigned as follows:

CPU ADDRESS	PORT BITS	COUNTER BITS	COMMENTS
700A                This address shall normally READ (decode) “55 HEX”.  If the standby power supply fails or is removed, it shall decode “54 HEX”.  A WRITE to this address will RESET the RTCA Binary Counter.
700B	1-6	1-6	READ ONLY
700C	1-6	7-12	READ ONLY
700D	1-6	13-18	READ ONLY
700E	1-6	19-24	READ ONLY

                                                20.4.22.26         An SPST finger throw LOGIC switch shall be provided on the board to activate/deactivate standby power to the RTCA Circuitry.  With the switch in deactivated state the RTCA Circuitry shall present NO power drain to the standby power supply.

                        20.5      METHOD OF MEASUREMENT. Model 170 Controller Units shall be measured for payment by the number of units each delivered as directed by the Department.

                        20.6      BASIS OF PAYMENT. Model 170 Controller Unit will be paid at the contract unit price each, which price shall be payment in full, for furnishing a complete Model 170 Controller Unit and for all labor, equipment, transportation, and incidentals necessary to complete this item of work.

21                     ITEM 21. CABINET 334

                        21.1      DESCRIPTION.  This section describes all elements and requirements for providing Model 334 controller cabinets.  These cabinets will be used for housing a Model 170, Model 170E, and 2070 controllers and all wiring connections necessary to allow the operation of other field devices which may be located in the cabinet.

                                    21.1.1   Processor Cabinet & Assembly: The cabinet shall be furnished, ready for operation with the following composition:

                                                Housing

                                                Mounting Cage

                                                Power Distribution Assembly #3

                                                Service Panel

                                                C2 Harness

                                                C1 Harness #6

                                                Input/Communications Panel

                                                Input File I

                                                C6 Harness

                                    21.1.2   All assemblies and files shall be mounted on the cage mounting rails per cabinet model detail.  Cabinet model interface wiring shall be as specified C1 Harness, detailed wiring lists, and required one line wiring.

                                    21.1.3   Cabinet Shipping Requirements - The cabinet shall be delivered mounted on a plyboard shipping pallet.  The pallet shall be bolted to the cabinet base.  The cabinet shall be enclosed in a slipcover cardboard packing shell.  The housing doors shall be blocked to prevent movement during transportation.

                                    21.1.4   All bolts, nuts, washers, screws (size 8 or larger), hinges and hinge pins that are subject to corrosion shall be stainless steel unless otherwise specified.  In areas where corrosion resistance is not a factor, plated steel hardware is acceptable.

                                    21.1.5   A cage mounting clear area for the controller unit shall be provided.  The area shall extend 1.5 inches in front of and 16 inches behind the front EIA mounting angles.

                                    21.1.6   All conductors, terminals, and parts which could be hazardous to maintenance personnel shall be protected with suitable insulating material.

                                    21.1.7   Cabinet Assemblies: The following equipment shall be completely removable from the cabinet without removing any other equipment and using only a slotted or Phillips screw driver:

                                                Power Supply Assembly

                                                Power Distribution Assembly #3

                                                Input File

                                                Service Panel

                                                Input/Communications Panel

                                                Monitor Unit

                                    21.1.8   All fuses, circuit breakers, switches (except Fan Fuse) and indicators shall be readily visible and accessible when the cabinet front door is open.

                                    21.1.9   All equipment in the cabinet, when required, shall be clearly and permanently labeled.  The marker strips shall be made of material that can be easily and legibly written on using a pencil or ballpoint pen.  Marker strips shall be located immediately below the item they are to identify and must be clearly visible with the items installed.

                                    21.1.10 Resistor-capacitor transient suppression shall be provided at all AC relay sockets (across relay coil), except for the Flash Transfer Relays (FTR) in the output files where one suppression device may be common for all.

                                    21.1.11 A leakage resistor, which permits a small amount of current to pass through the heavy duty relay coil, shall be installed across the terminals of relay sockets to overcome the residual magnetism.

                                    21.1.12 Assembly or file depth dimension shall include terminal blocks.

                                    21.1.13 All assemblies and files shall allow air circulation through its top and bottom unless specifically called out otherwise.

                                    21.1.14 Socket types for the following equipment shall be:

• Switch Pack                              BEAU S-5412-XX (or equal)
• Heavy Duty Relay                     BEAU S-5408-XX (or equal)
• Power Supply Mod                   BEAU S-5406-XX (or equal)
• 208 Monitor Unit                       PCB 22/44S

                                    21.1.15 Connector sockets for flasher unit, power supply, and switch pack modules shall be mounted with their front face 7.5 inches deep from assembly or file front panel.

                                    21.1.16 Guides (top and bottom) shall be provided for Switch Pack Modules, Flasher Units, Monitor Unit, Watchdog Timer Module, Detector & Isolator Modules, and Power Supply Module (bottom only).  The guides shall begin 1.0 +/-0.5 inches in from front panel surface and extend to within 0.5 inches from the connector socket face.

                                    21.1.17 Assemblies and Files shall be fabricated of 0.060 inch minimum thickness aluminum or stainless steel sheet.  The metal surface shall be treated with clear chromate.

                        21.2      Housing Construction: All cabinets shall be 334 cabinets and cage assemblies. The housing shall be rainproof with the top of the enclosure crowned to prevent standing water.  It shall have single front and rear doors, each equipped with a lock.

                                    21.2.1   The enclosure, doors, lifting eyes, gasket channels, and all supports welded to the enclosure and doors shall be fabricated of 0.125 inch minimum thickness aluminum sheet.  Bolted on supports shall be either the same material and thickness as the enclosure or 0.105 inch minimum steel.  The side panels and filter shell shall be fabricated of 0.080 inch minimum thickness aluminum sheet.

                                    21.2.2   All exterior seams for enclosure and doors shall be continuously welded and shall be smooth.  All edges shall be filed to a radius of 0.03125 inch minimum.  Exterior cabinet welds shall be done by gas Tungsten arc TIG process only.  ER5356 aluminum alloy bare welding electrodes conforming to AWS A5.10 requirements shall be used for welding on aluminum.  Procedures, welders and welding operators shall conform to the requirements and practices in AWS B3.0 and C5.6 for aluminum.  Internal cabinet welds shall be done by either gas metal arc MIG or gas tungsten arc TIG Process.

                                    21.2.3   Aluminum surfaces shall conform to the following:

                                                A.        An anodic coating shall be applied to the aluminum surface after the surface has been cleaned and etched.  The cleaning and etching procedure shall be to immerse in inhibited alkaline cleaner at 71^oC for 5 minutes.  (Oakite 61A, Diversey 909 or equivalent in mix of 6 to 8 ounces per gallon to distilled water).  Rinse in cold water.  Etch in a sodium solution at 66^oC for 5 minutes (0.5 ounce sodium fluoride plus 5 ounces of sodium hydroxide mix per gallon to distilled water).  Rinse in cold water.  Desmut in a 50% by volume nitric acid solution at 20^oC for 2 minutes.  Rinse in cold water.

                                                B.         The anodic coating shall conform to MIL-A-8625C (Anodic Coatings for Aluminum and Aluminum Alloys) for Type II, Class I Coating except the outer housing surface coating shall have a 0.0007 inch minimum thickness and a 27 milligrams per square inch minimum coating weight.  The anodic coating shall be sealed in a 5% aqueous solution of nickel acetate (PH 5.0 to 6.5) for 15 minutes at 99^oC.

                                    21.2.4   The enclosure door frames shall be double flanged out on all 4 sides and shall have strikers to hold tension on and form a firm seal between the door gasketing and the frame.  The dimension between the door edge and the enclosure external surface when the door is closed and locked shall be 0.156 (+/-0.08) inch.

                                    21.2.5   Gasketing shall be provided on all door openings and shall be dust-tight.  Gaskets shall be 0.25 inch minimum thickness closed cell neoprene or silicone (BOYD R‑10480 or equal) and shall be permanently bonded to the metal.  If neoprene is used the mating surface of the gasketing shall be covered with a silicone lubricant to prevent sticking to the mating metal surface.  A Gasket Top Channel shall be provided to support the top gasket on the door (prevent gasket gravitational fatigue).

                                    21.2.6   Cage bottom support mounting angles shall be provided on either side, level with the bottom edge of the door opening, for horizontal support and bolt attachment.  In addition, side cage supports shall be provided for the upper cage bolt attachments.  Spacer brackets between the side cage supports and the cage shall be a minimum thickness of either 0.188 inch aluminum or 0.059 inch stainless steel.

                                    21.2.7   The housing shall be provided with 2 lifting eyes for placing the cabinet on its foundation.  Each eye opening shall have a minimum diameter of 0.75 inch.  Each eye shall be able to support a weight load of 1000 pounds.

                                    21.2.8   All exterior bolt heads shall be tamperproof type.

                                    21.2.9   The housing shall have no provisions for a police door.

                                    21.2.10 The housing shall be equipped with metal hooks to hang a plastic envelope as specified herein.

                                    21.2.11 (4) Door Latches and Locks - The latching handles shall have provision for padlocking in the closed position.  Each handle shall be 0.75 inch minimum diameter stainless steel with a minimum 0.5 inch shank.  The padlocking attachment shall be placed at 4.0 inches from the handle shank center to clear the lock and key.  An additional 4.0 inches minimum gripping length shall be provided.

                                                21.2.11.1           The latching mechanism shall be a three-point draw roller type.  The pushrods shall be turned edgewise at the outward supports and have a cross section of 0.25 inch thick by 0.75 inch wide, minimum.

                                                21.2.11.2           When the door is closed and latched, the door shall be locked.  The locks and handles shall be on the right side of the front door and the left side of the rear door.  The lock and lock support shall be rigidly mounted on the door.  In the locked position, the bolt throw shall extend a minimum of 0.25 +/-0.03125 inch into the latch cam area.  A seal shall be provided to prevent dust or water entry through the lock opening.

                                                21.2.11.3           The locks shall be Corbin #2.  One key shall be supplied with each lock.  The keys shall be removable in the locked position only.

                                                21.2.11.4           The locks shall have rectangular, spring loaded bolts.  The bolts shall have a 0.281 inch throw and shall be 0.75 inch wide by 0.375 inch thick (tolerance is +/-0.035 inch).

                                                21.2.11.5           The center latch cam shall be fabricated of a minimum thickness 0.1875 inch steel or aluminum.  The bolt surface shall horizontally cover the cam thickness.  The cam shall be structured to only allow the door to open when the handle is moved toward the center of the door.

                                                21.2.11.6           Rollers shall have a minimum diameter of 0.875 inch with nylon wheels and steel ball bearings.

                                                21.2.11.7           The housing ventilation including intake, exhaust, filtration, fan assembly and environmental control are as follows:

                                                21.2.11.8           The front and rear doors shall be provided with louvered vents.  The louvered vent depth shall be a maximum of 0.25 inches.  A removable and reusable air filter shall be housed behind the door vents.  The filter filtration area shall cover the vent opening area.  A filter shell shall be provided that fits over the filter providing mechanical support for the filter.  The shell shall be louvered to direct the incoming air downward.  The shell sides and top shall be bent over a minimum of 0.25 inches to house the filter.  The filter resident in its shell shall be held firmly in place with a bottom bracket and a spring loaded upper clamp.  No incoming air shall bypass the filter.  The bottom filter bracket shall be formed into a waterproof sump with drain holes to the outside housing.

                                                21.2.11.9           The intake (including filter with shell) and exhaust areas shall pass a minimum of 60 cubic feet of air per minute for housing #1 and 26 cubic feet of air per minute for housing #2.

                                                21.2.11.10         The housing shall be equipped with an electric fan with ball or roller bearings and a capacity of at least 100 cubic feet of free air delivery per minute.  The fan shall be mounted within the housing and vented.

                                                21.2.11.11         The fan shall be thermostatically controlled and shall be manually adjustable to turn on between 33^oC and 65^oC with a differential of not more than 6^oC between automatic turn on and off.  The fan circuit shall be protected at 125% of the fan motor ampacity.  The manual adjustment shall be graded in 10^oC increment scale.

                                                21.2.11.12         The filter shall be 16 inches wide by 12 inches high by 0.875 inches thick.  The filter shall be a ECO-AIR Products E35S or equal.

                                    21.2.12 Hinges and Door Catches: Two-bolt per leave hinges shall be provided to bolt the enclosure to the door.  Housing 1 shall have 4 hinges and Housing 2 three hinges.  Each hinge shall be 3.5 inches minimum length and have a fixed pin.  The pin ends shall be welded to the hinge and ground smooth.  The pins and bolts shall be covered by the door edge and not accessible when the door is closed.

                                                            Front and rear doors shall be provided with catches to hold the door open at both 90 and 180 +/-10 degrees.  The catch minimum diameter shall be either 0.375 inch for plated steel or aluminum rods or 0.25 inch for Stainless steel.  The catches shall be capable of holding the door open at 90 degrees in a 60 mph wind acting at an angle perpendicular to the plane of the door.

                                    21.2.13 Heating Element: The housing shall be equipped with a heating element installed in the bottom front of the cabinet, and conforming to the following requirements:

                                                            A.        The heating element shall draw 500 watts and have an output of at least 1700 BTU/hr.

                                                            B.         The heating element shall have a built-in quick response thermostat with sealed contacts that has a temperature control range of 40^oF to 100^oF, and have a built-in thermal cut-off to automatically shut-off heater in event of overheating.

                                                            C.         The heating element shall be constructed of 20 gauge cold-rolled steel, completely welded, with copper brazed rugged steel fins.  No fans or motors shall be used in the heating element.

                                                            The heater shall be mounted along the side of the rack and shall be no less than 6-inches from the bottom of the cabinet.

                                    21.2.14 Shelves : Each cabinet shall be equipped with two shelves.  Shelves shall be the full width of the rack and 12-inches deep.

                                                            Shelves shall be constructed of 0.125 inch aluminum (minimum) with a 1-inch lip turned up along the back of the shelves.  The shelves shall attach to the rack assembly by using four (4) Phillips head screws to the front of the rack.  The shelves shall be designed to support a minimum of 50 pounds.

                                    21.2.15 Pull-Out Drawer: A pull-out, hinged-top drawer, having sliding tracks, with lockout and quick-disconnect feature, such as a Vent-Rak Retractable Writing Shelf, #D-4090-13 or equivalent - shall be provided as shown in the cabinet drawings.  The pull-out drawer shall extend a minimum of 14 inches in order to facilitate removal of the processor by providing the processor with an aluminum platform covered by a formica-type chemical-proof plastic sheet while the rear connector is being removed.  It shall be possible to lift this hinged platform in order to gain access to the interior of the drawer.  Minimum interior dimensions of the drawer shall be 1 inch high, 13 inches deep, and 16 inches wide.  The drawer shall be capable of supporting a 40 pound controller when fully extended.

                                    21.2.16 Cabinet Light: Each cabinet shall be equipped with one (1) fluorescent lighting fixture mounted inside the top front portion of the cabinet. The fixture shall have an F-15-T-8 cool white lamp; operated from a normal power factor, UL listed ballast.  A door actuated switch shall be installed to turn the cabinet light on when the front door is opened.  The door switch shall be on a separate circuit by itself; and used only to turn on the cabinet light.

                                    21.2.17 Plastic Envelope: Each cabinet shall be supplied with a heavy duty plastic envelope to store traffic plans, wiring diagrams, schematics, etc.  This envelope shall have metal grommets so that it hangs from the door hooks.  The envelope shall have minimum dimensions of 10"x15".

                        21.3      Mounting Cage: A standard EIA 19-inch rack cage shall be installed inside the housing for mounting of the controller unit and cabinet assemblies.  The EIA rack portion of the cage shall consist of 2 pairs of continuous, adjustable equipment mounting angles.  The angle nominal thickness shall be either 0.1345 inch plated steel or 0.105 stainless steel.  The angles shall be tapped with 10-32 threads with EIA universal spacing.  The angle shall comply with Standard EIA RS-310-B and shall be supported at the top and bottom by either welded or bolted support angles to form a cage.

                                    21.3.1   Clearance between rails for mounting assemblies shall be 17.75 inches.

                                    21.3.2   Two steel supporting angles extending from the front to the back rails shall be supplied to support the controller unit.  The angles shall be designed to support a minimum of 50 pounds each.  The horizontal side of each angle shall be a minimum of 3 inches.  The angles shall be vertically adjustable.

                                    21.3.3   The cage shall be bolted to the cabinet at 4 points, via the housing cage supports and associated spacer brackets, 2 at the top and 2 at the bottom of the rails.

                                    21.3.4   The cage shall be centered within the cabinet.

                        21.4      Power Distribution Assembly (PDA #3): The following equipment shall be provided with the power distribution assembly PDA #3:

                                    1 -        Duplex NEMA 5-15R Controller Receptacle

                                    2 -        Duplex NEMA 5-15R Equipment Receptacle

                                    1 -        1 Pole 30 Amperes, 120 VAC Main Circuit Breaker

                                    3 -        1 Pole 15 Amperes, 120 VAC Circuit Breaker (Equip & Field)

                                    1 -        Model 206 Power Supply Module and Socket

                                    1 -        Model 208 Monitor Unit and Socket

                                    1 -        Model 430  Heavy Duty Relay and Socket (Transfer Relay)

                                    1 -        Watchdog Timer ON/OFF-RESET Control Switch

                                    3 -        Model 200 Switch Packs and Sockets

                                    3 -        10 Position TBK T1, T2, & T4

                                    1 -        4 Position TBK T3

                                    21.4.1   Rating of breakers shall be shown on face of breaker or handle.  Breaker function shall be labeled below breakers on front panel.

                                    21.4.2   The first equipment receptacle in the circuit shall have ground-fault circuit interruption as defined in the National Electrical Code.  Circuit interruption shall occur on 6 ma of ground-fault current and shall not occur on less than 4 ma of ground-fault current.

                                    21.4.3   All conductors from the power distribution assembly routed to the cabinet wiring shall be connected to the terminal block on the common side, except for the AC power conductor between the service terminal block and main circuit breaker.  All internal conductors terminating at the blocks shall be connected to the other side of the blocks.

                                    21.4.4   Ganged circuit breakers shall be certified by the circuit breaker manufacturer that their circuit breakers shall gang trip.

                                    21.4.5   The monitor unit ON/OFF-RESET switch shall be a DPST toggle control mounted on the PDA #3 front panel.  When placed in DOWN position (OFF-RESET) a grounded input shall be presented at the monitor unit pin 22 (resetting the WDT circuitry) and the other side switch circuit close bypassing the monitor unit.

                                    21.4.6   Model 206 Power Supply Module: A power supply shall be provided to supply +24 VDC to the input and output files for use by their associated devices.  The power supply shall be of ferro-resonant design having no active components and conform to the following requirements:

1. Line Regulation - 2% from 90 to 135 VAC at 60 Hz, plus an additional 1.6% for each additional 1.0% frequency change.
2. Load Regulation - 5% from ampere to 5 amperes with a maximum temperature rise of 30^oC above ambient.
3. Design Voltage - +24 +/-0.5 VDC at full load, 30^oC above ambient.
4.  Full Load Current - 5 amperes, minimum.
5. Ripple Noise - 2 volts peak-to-peak and 500 millivolts RMS at full load.
6. Line Voltage - 90 to 135 VAC.
7. Efficiency - 70% minimum.
8. Minimum Voltage - +22.8 VDC.
9. Circuit capacitors shall be rated for 40 volts, minimum.

                                                21.4.6.1            The assembly shall have a minimum depth of 5.5 inches.

                                                21.4.6.2            The front panel shall include AC and DC fuses, power ON light and test points for monitoring the output voltages.

                                                21.4.6.3            The power supply cage and transformer shall be securely braced to prevent damage in transit.

                                                21.4.6.4            The module chassis shall be vented.  Its top and sides shall be open except for unit supports.

                                                21.4.6.5            When resident in the PDA assembly the module shall be held firmly in place by its stud screw, assembly connector support panel and a wingnut.

                                                21.4.6.6            Two 0.5 ohm, 10 watt minimum wire-wound power resistors with a 0.2uH inductance shall be provided (1 on the AC+ power line and 1 on the AC- line).  Three MOV surge arresters rated for 20 Joules minimum shall be supplied between AC+ and EG, AC- and EG, and between AC+ and AC-.  A 0.68uF capacitor shall be placed across AC+ and AC- between the two power resistors and the MOV's.

                                                21.4.6.7            Terminal screw size shall be 10-32 for TBK T1, T2, & T4 and 6-32 for TBK T3.

                                                21.4.6.8            Input File: The file shall have a maximum depth of 8.5 inches and shall intermate with and support 14 two-channel detector sensor or isolator units.

                                                                        The file shall provide a PCB 22/44S connector centered vertically for each two-channel detector.  The associated number and letter side connectors shall be shorted internally.  Pins D, E, F, J, K, L, and W shall be brought out to a 8 position terminal block on the back of the file.  The output emitters shall be common grounded with the ground terminating at TB 15, position 4.  Position 8 of the terminal block is assigned to equipment ground and is used to terminate lead in shields.

                                                                        The input file shall be provided with marker strips to identify isolators and detectors in the file.

                                                21.4.6.9            TBK terminal screw size shall be 8-32.

                        21.5      Side Panels:  Two panels shall be provided and mounted on the cabinet side walls.  In viewing from the front door, the left side panel shall be designated as the “Input/Communications” and the right side panel shall be designated as the “Service Panel”.

                                    21.5.1   The panel shall be fabricated from 0.125 inch sheet aluminum, and have the dimensions shown on the details.  The panel shall be drilled and tapped, as necessary, to mount the terminal blocks and other attachments described herein, as well as to mount the panel to the cabinet wall as shown in the details.  Sharp edges, or burrs, caused by the cutting or drilling process shall be removed.

                                    21.5.2   The service panel shall conform to the cabinet details provided herein.

                                    21.5.3   The service panel shall be equipped with a 4 outlet handi-box.

                                    21.5.4   The handi-box shall be wired to the series portion of the SHA-1210 specified herein.

                                    21.5.5   The cabinet shall be protected by filtering surge protector (EDCO Model SHA-1210 or equal).  The protector shall have the following minimum features:

                                                Peak Current                            20,000 amps

                                                Life Test                                   5% change

                                                Clamp Voltage (L-N)                280V @ 20 KA

                                                Response Time             Voltage never exceeds 28 volts during surge

                                                Continuous Service Current        10 amps maximum

                                                                                                120 VAC 60 Hz

                                    21.5.6   The surge protector shall be mounted to the service panel as shown in the details.

                                    21.5.7   The input/communications panel shall be equipped with an adequate number of terminal blocks so that there is at least one set of terminals for each position on input files.

                                    21.5.8   The input/communications panel shall be completely wired to the input files.

                                    21.5.9   The terminals on the input panel shall be permanently labeled to match their respective input file position.

                                    21.5.10 All loop detector terminals on the input panel which are active shall be provided with surge protection.  Surge protection devices shall have the following minimum features:

                          •           protect the inputs against differential (between the loop lead) surges, and against common mode (between loop lead and ground) surges.

                          •           withstand a 400 amp surge current (differential mode) with an 8 x 20 microsecond waveform; and withstand a 1000 amp surge current (common mode) with an 8 x 20 microsecond waveform.

                          •           minimum capacity of 6 occurrences at peak surge current.

                          •           clamp the surge voltage to 30 volts or less when subjected to peak surge currents for the differential mode; and 40 volts or less for the common mode as specified above.

                          •           maximum response time of 40 nanoseconds.

                                    21.5.11 The input/communications panel shall be provided with a communications cable termination block (CTB-1).

                                    21.5.12 The input/communications panel shall be provided with a test point termination block (CTB-3).  This block shall be an eight position single screw closed back barrier strip and shall be mounted on the communications termination panel, as shown on the details.  The strips shall be rated at 15 amperes and shall be provided with 6-32 x 1.4 inch nickel plated brass binder head screws.

                                    21.5.13 A grounding stud shall be provided on each panel.  The stud shall extend through the panel.  The overvoltage protection devices' ground leads shall be attached to the stud on the front side of the panel.  An No. 8 AWG copper conductor shall be attached to the stud on the back side of the panel, and shall connect to the cabinet's equipment grounding bus.

                                    21.5.14 A twelve-conductor jacketed cable shall be attached to terminal blocks CTB-2 and CTB-3, with ring lugs, as shown on the details.  The cable shall terminate in a standard C2P connector, and shall be routed through the cabinet and be of sufficient length to reach the C2S connector on the back of the 170 controller unit, when the unit is installed, or is being installed, in the equipment rack.

                                    21.5.15 As shown on the details, a feed-through opening, complete with protective grommet, shall be provided on the panel, to protect the C2P harness.  A strain relief device shall also be provided.

                                    21.5.16 Six 1/4 inch diameter holes shall be provided, as shown on the details herein.

                                    21.5.17 A legend shall be provided on each termination panel as shown on the details.  The legend shall be in 0.1 inch high block letters which have been silk-screened on to a properly prepared termination panel surface.

                                    21.5.18 A 25-pin male connector shall be installed on the communications termination panel.  The 25-pin connector shall be wired to terminal block CTB-3 as shown on the details.

                        21.6      Cabinet Harnesses: The C1 harness shall be a minimum of 4 feet in length.  The harness wire bundle shall be provided with external protection and routed on the input panel side of the cabinet.  Adequate length shall be provided to allow the C1P Connector to properly connect any Department approved Model 170 controller unit mounted in the cabinet.

                                    21.6.1   One end of the C1 harness shall be the C1P connector with pin contacts wired per the detail assignment.  The other ends of the harnesses shall terminate as follows:

                                                Harness #6 -     Assigned input file I position

                                                C6S connector (connected to C6P on PDA #3)

                                    21.6.2   Conductors between the C1 connector and the input file(s) shall be of adequate length to allow any conductor to be connected to any detector output terminal (positions S, F, or W).

                        21.7      Cabinet Wiring: All conductors used in cabinet wiring shall terminate with properly sized non-insulated (if used, for DC logic only) or clear insulated spring-spade type terminals except when soldered to a through-panel solder lug on the rear side of the terminal block or as specified otherwise.  All crimp-style connectors shall be applied with a power tool which prevents opening of the handles until the crimp is completed.

                                    21.7.1   Conductors between the service terminal AC- and Equipment Ground and their associated bus, the equipment ground bus conductor to Power Distribution Assembly and cage rail, AC- Bus to Power Distribution Assembly shall be No. 8 or larger.

                                    21.7.2   All conductors unless otherwise specified shall be No. 22, or larger, with a minimum of 19 copper strands.  Conductors shall conform to Military Specification:  MIL-W-16878D, Type B, or better.  The insulation shall have a minimum thickness of 10 mils and shall be nylon jacketed polyvinyl chloride except the Conductors No. 14 and larger may have Type THHN insulation (without Nylon Jacket), and shall be stranded with a minimum of 7 copper strands.

                                    21.7.3   All conductors, except those which can be readily traced, shall be labeled.  Labels attached to each end of the conductor shall identify the destination of the other end of the conductor.

                                    21.7.4   All conductors shall conform to the following color-code requirements:

• The neutral conductors of AC circuits shall be identified by a continuous white or gray color.
• The equipment grounding conductors shall be identified by a solid green color.
• The DC logic ground conductors shall be identified by a solid white color with a red stripe.
• The ungrounded AC+ conductors shall be identified by a solid black wire.
• The logic ungrounded conductors shall be identified by any color not specified above.

                                    21.7.5   All wiring harnesses shall be neat, firm, and routed to minimize crosstalk and electrical interference.  Printed circuit motherboards are to be used where possible to eliminate or reduce cabinet wiring.

                          •           Wiring containing AC shall be routed and bundled separately or shielded separately from all logic voltage control circuits.

                          •           Cabling shall be routed to prevent conductors from being in contact with metal edges.  Cabling shall be arranged so that any removable assembly may be removed without disturbing conductors not associated with that assembly.

                                    21.7.6   Within the cabinet, the DC logic ground and equipment ground shall be electrically isolated from the AC grounded conductor and each other by 500 megohms when tested at 250 VDC, with the power line surge protector disconnected.

                                    21.7.7   The AC- copper terminal bus shall not be grounded to the cabinet or connected to logic ground.  Nylon screws with a minimum diameter of 0.25 inch shall be used for securing the bus to the service panel.

                                    21.7.8   The cabinet power supply DC Ground shall be connected to the DC logic ground bus using a No. 14, or larger, stranded copper wire.

                                    21.7.9   Each detector lead-in pair, from the field terminals in the cabinet to the sensor unit rack connector, shall be a cable of UL Type 2092 or better.  The stranded tinned copper drain wire shall be connected to a terminal on the input file terminal block.  This input terminal shall be connected to the equipment grounding bus through a single conductor.

                        21.8      Terminal Blocks: The terminal blocks shall be barrier type rated at 20 amperes, 600 volts RMS minimum.  The terminal screws shall be 0.3125 inch minimum length nickel plated brass binder head type with screw inserts of same material.  Screw size is called out under associated cabinet assembly, file or side panel.

                                    21.8.1   The terminals of the power line service terminal block shall be labeled “AC+, AC-, and AC GND”, and shall be covered with a clear insulating material to prevent inadvertent contact.  Terminating lugs large enough to accommodate No. 2 conductors shall be furnished for the service terminal block.  The terminal block shall be rated for 50 amperes at 600 volts peak, minimum.  The block shall be either a double row, 3 position screw/insert with shorting bar (screws, inserts, and shorting bars shall be nickel plated brass) or a Marathon #1423552 (or equal).  If the Marathon block is used, the surge protectors shall be terminated under a screw head (not common with AC+, AC-, or AC Ground).  The AC+, AC-, and AC Ground conductors connecting to the service terminals and appropriate buses shall not be spade lugged.

                        21.9      Model 200 Switch Packs: Each cabinet assembly shall include three (3) model 200 switch packs. The Model 200 solid state switch pack shall be a modular plug-in device containing 3 solid state switches to be used for opening and closing connections between the applied power and an external load.

                                    21.9.1   The module chassis providing rigid unit support (for connector mounting, PCB support, module alignment and insertion/removal) and Triac heat sinking shall be made of metal suitable to meet support and environmental requirements.  Where electrical isolation protection is the only requirements, plastic insulation material may be used in lieu of metal.

                                    21.9.2   Module control circuitry and switches shall be readily accessible by the use of a screwdriver or wrench.  Only one type of screw head end (slotted or phillips) shall be used throughout.

                                    21.9.3   Each module shall be so constructed that persons inserting or removing the module will not be exposed to any parts having live voltage.  A handle shall be attached to the front of each module to facilitate the module insertion or removal from its mating connector.

                                    21.9.4   The module shall be so constructed that its lower surface will be no more than 2.10 inches below the centerline of the connector and that no part will extend more than 0.90 inch to the left or 1.10 inches to the right of the centerline of the connector pin array.

                                    21.9.5   Continuous edge guides shall be provided on the module.

                                    21.9.6   The front panel of the module shall be provided with one indicator per switch.  The indicators shall be vertically centered on the front panel with top and bottom indicators no more than one inch from the panel vertical center.

                                    21.9.7   Each switch shall have the capability of switching any current from 0.05 to 10 amperes (AC) at a power factor of 0.85.

                                    21.9.8   Each switch shall turn ON within +/- 5 degrees of the zero voltage point of the AC sinusoidal line, and shall turn OFF within +/- 5 degrees of the zero current point of the alternating current sinusoidal line.  After power restoration, the zero voltage turn ON may be within +/- 10 degrees of the zero voltage point only during the first half cycle of line voltage during which an input signal is applied.  Turn ON and OFF shall be within 8.33 ms following application or removal of the logic signal, respectively.

                                    21.9.9   Each switch shall be designed for a minimum of 300 million operations while switching a tungsten filament load of 1,000 watts at 70^oC.

                                    21.9.10 Each switch shall have isolation between input DC control and AC to lights output circuit of at least 2,000 VDC and 10,000 megohms DC.

                                    21.9.11 Each switch shall have a one cycle surge rating of 175 amperes RMS and a one second surge rating of 40 amperes RMS.

                                    21.9.12 Each switch shall be capable of withstanding a peak inverse voltage of 500 volts at 70^oC and no more than 20 ma leakage.

                                    21.9.13 The connector plug contact tails shall be solder hook or eye styles only.  PCB (soldered to the PCB) and quick connect connections styles are not allowed.

                                    21.9.14 A LOW state input (negative true logic) from the controller unit (saturated NPN transistor, 0 to 6 VDC) shall cause the switch to be energized.  A HIGH state input (cut-off NPN transistor, 16 VDC or greater) shall cause the switch to de-energize.  The state transition (conducting to nonconducting or vice versa) shall occur between 6 and 16 VDC.

                                    21.9.15 The incoming logic signal shall not sink more than 20 ma nor be subjected to more than 30 VDC.

                                    21.9.16 The module shall not draw more than 60 ma at +16 VDC or greater from the cabinet power supply with all switches ON.

                                    21.9.17 Each switch shall have an OFF state dv/dt rating of 100 volts per us or greater.

                                    21.9.18 The indicators shall be labeled or color coded from top to bottom “Red”, “Yellow”, and “Green”.  Each indicator shall indicate a controller unit output circuit.

                                    21.9.19 The input circuit of each switch shall have reverse polarity protection.

                                    21.9.20 The resistance between the AC+ input terminal and the AC+ output terminal of each switch shall be 15,000 ohms, minimum, when the switch is in the open position.  The output current from the switch through the load when the load switch is in the OFF state shall not exceed 20 ma peak.

                                    21.9.21 Each switch shall be isolated so that line transients or switch failure will not adversely affect the controller unit.

                                    21.9.22 The Plug Connector shall be a BEAU P-5412-LAB or equal.

                        21.10    Model 208 Monitor Unit: Each ramp meter processor assembly shall include one Model 208 monitor unit.

                                    21.10.1 The Monitor Unit shall render reliable detection and cause a relay output contact condition (FAILED state) when sensing the following:

                          •           The +24 VCD Power Supply Voltage below specified threshold

                          •           A WDT Timeout Condition

                                    21.10.2 An electro-mechanical relay shall be provided to switch an output circuit during a FAILED state.  The relay coil shall be energized in a NON FAILED state.  The relay contacts shall be rated for a minimum of 3 amperes at 120 VAC and 100,000 operations.  Contact opening/closing time shall be 30 ms or less.

                                    21.10.3 A momentary SPST CONTROL switch labeled “RESET” shall be provided on the unit front panel to reset the monitor unit circuitry to a NON FAILED state.  The switch shall be so positioned on the front panel that the switch can be operated while gripping the front panel handle.  A reset issuance (Unit Reset) shall be a onetime input to prevent the monitor from constant reset.

                                    21.10.4 All monitor logic and driver power shall be generated from an internal unit power supply except for WDT and +24 VDC cabinet voltage sense circuits.  The WDT sense circuit power may be derived from either power supply.  Circuits on the monitor that are “powered” by the +24 VDC cabinet power supply shall be optically isolated from those deriving their power from the monitor unit internal supply.  The monitor shall not draw more than 500 ma from the +24 VDC cabinet power supply.  Failure to provide reliable operating voltage levels shall cause a FAILED state.

                                    21.10.5 The monitor unit shall sense an external +24 VDC power supply output voltage.

                                    21.10.6 Voltages sensed at +18 VDC or below for a duration of 500 ms or longer shall cause a FAILED state.

                                    21.10.7 Voltages sensed at +22 VDC or above shall NOT cause a FAILED state.

                                    21.10.8 Voltages sensed below +22 VDC for a duration of 200 ms or less shall NOT cause a FAILED state.

                                    21.10.9 All timing and voltages conditions other than those specified above may or may not cause a FAILED state.

                                    21.10.10            A FAILED state caused by sensing the power supply shall illuminate a front panel indicator light labeled “VDC FAILED”.  The indicator shall remain ON until Unit Reset.

                                    21.10.11            Only Unit Reset shall reset the power supply sense circuitry from a FAILED state.

                                    21.10.12            Watchdog timer (WDT) circuitry shall be provided to monitor a controller unit output line state routed to the monitor unit at its assigned pin.  The WDT Circuitry shall sense any line state change and the time between the last change.  No state change for 1.5 +/- 0.1 seconds shall cause a FAILED state.  The timer shall reset at each state change in a NON FAILED state.

                                    21.10.13            Only the Unit Reset or a WDT inactive due to the voltage sense shall reset the WDT from a FAILED state.

                                    21.10.14            A FAILED state caused by the WDT shall illuminate a front panel indicator light labeled “WDT ERROR”.  The indicator shall remain ON until Unit Reset Issuance.

                                    21.10.15            The WDT Circuitry shall sense the incoming VAC Line and when the voltage falls below 98 +/- 2 VAC for 50 +/-17 ms shall inhibit the WDT Function.  When the WDT Circuitry senses the incoming VAC Line rise above 103 +/-2 VAC for 50 +/-2 ms the WDT shall become active.  A hysteresis between the Voltage Inhibit and the Voltage Active Settings shall be a minimum of 3 Volts.

                                    21.10.16            The model 208 shall conform to the following requirements:

• Provision to drive an external NE2H Neon light through a 56K Ohm, 1/2 Watt series resistor (resident on unit) from the unit shall be provided.
• The PDA #3 WDT Reset Input shall not be sensed by the unit.  It exists only for downward compatibility reset of past WDT plug in boards.
• The output relay contact for FAILED state shall be “OPEN”.

                        21.11    Model 242 DC Dual Isolation Modules: The dual isolation modules are units which contain two (2) isolation channels, which plug into the detector rack.  Each isolation channel, working independently, shall provide isolation between electrical contacts external to the module (e.g., video processing equipment, microwave detector) and the microcomputer input.  The isolation module is of purely solid-state design.  The method of isolation shall be based upon a design philosophy which shall render reliable operation.

                                    Operational Specifications: The isolation module shall be mounted on an edge-connected printed circuit board of the dimensions shown on the details herein.

                                    21.11.1 Each isolation channel shall not draw more than 400 milliamperes from the 24 VDC cabinet supply for its operating power.

                                    21.11.2 The isolation module front panel shall be provided with a hand-pull to facilitate insertion and removal from the rack enclosure.

                                    21.11.3 The isolation channel shall have a front panel mounted indicator to provide visual indication of each electrical contact closure and a test switch to place an input to the isolation channel.  Both indicator and switch shall be on the input side of the optical coupler.  Test switch shall be a single pole-double throw, three (3) position switch; momentary ON, OFF and one (1) maintained ON positions.  The contacts shall be either silver or coin silver with gold over nickel plate rate for 5 ampere at 115 VAC.

                                    21.11.4 Each isolation channel output shall be an optoisolated NPN open collector capable of sinking 500 milliamperes at 30 volts.  This output shall be compatible with the Model 170 Controller Unit.  Each isolation channel shall present ground true logic to the Controller Unit inputs.

                                    21.11.5 Front panel of module shall be labeled as to model number and titled “DC DUAL ISOLATION MODULE”.

                        21.12    Electrical Requirements: Each isolation channel input shall be turned on (true) when the resulting contact closure causes an input voltage less than 8 VDC, and shall be turned off (false) when the resulting contact opening causes the input voltage to exceed 12 VDC.  Each input shall deliver no less than 15 nor more than 20 milliamperes to an electrical contact closure or short from the internal 24 volt supply.

                                    21.12.1 The minimum isolation shall be 1000 megohms and 2500 VDC from input to output.

                                    21.12.2 Lightning Protection - Lightning protection shall be installed across all input pairs of the detector/input card.  The protection shall be designed to enable the device to withstand a 10 microfarad capacitor, charged to +/-1000 VDC, being placed, for a period of one (1) second, directly across the input pins or between either input pin and Chassis Ground of the detector/input card with no load present.

                                    21.12.3 Board Edge Connector Pin Assignment shall be as follows:

PIN		FUNCTION		PIN		FUNCTION
A B C D E F H J K L		DC Ground +24 VDC NC Input #1 Input #1 Common Output #1(C) Output #1(E) Input #2 Input #2 Common Chassis Gnd		M N P R S T U V W X Y Z		AC Neutral +115 VAC NC NC NC NC NC NC Output #2(C) Output #2(E) NC NC
= Slotted for keying (C)                   = Collector (E)                   = Emitter (NC)                = Not connected

                                    21.12.4 Each processor assembly shall be complete with all specified components and wiring, and ready for installation and external connections.

                        21.13    METHOD OF MEASUREMENT. Cabinet & Assemblies shall be measured for payment by the number of units each, complete with all components provided as specified herein, delivered to the Department.

                        21.14    BASIS OF PAYMENT. Cabinet & Assembly will be paid at the contract unit price each, which price shall be payment in full, for furnishing a complete Cabinet & Assembly and for all labor, equipment, transportation, and incidentals necessary to complete this item of work.

22                     ITEM 22. EQUIPMENT CABINET

                        22.1      DESCRIPTION.  This section describes all elements and requirements for providing equipment cabinets.  These cabinets will be used for housing various field equipment including but not limited to Variable Message Signs  controllers (VMS), video surveillance equipment, and communications equipment.

                        22.2      MATERIALS

                                    22.2.1   Cabinet: The cabinet shall be furnished, ready for operation with the following composition:

                                                Housing

                                                Mounting Cage

                                                Service Panel

                                                22.2.1.1            Cabinet Shipping Requirements - The cabinet shall be delivered mounted on a plyboard shipping pallet.  The pallet shall be bolted to the cabinet base.  The cabinet shall be enclosed in a slipcover cardboard packing shell.  The housing doors shall be blocked to prevent movement during transportation.

                                                22.2.1.2            All bolts, nuts, washers, screws (size 8 or larger), hinges and hinge pins that are subject to corrosion shall be stainless steel unless otherwise specified.  In areas where corrosion resistance is not a factor, plated steel hardware is acceptable.

                                                22.2.1.3            A cage mounting clear area for the controller unit shall be provided.  The area shall extend 1.5 inches in front of and 16 inches behind the front EIA mounting angles.

                                                22.2.1.4            All conductors, terminals, and parts which could be hazardous to maintenance personnel shall be protected with suitable insulating material.

                                    22.2.2   Housing Type: All cabinets shall be 334 cabinets and cage assemblies as shown in the detail diagram pages at the end of this category.

                                    22.2.3   Housing Construction: See Description in Section 23.2

                                    22.2.4   Service Panel:  A panel shall be provided and mounted on the cabinet right wall when viewed from the front door.  The panel shall be fabricated from 0.125 inch sheet aluminum, and have the dimensions shown on the details.  The panel shall be drilled and tapped, as necessary, to mount the terminal blocks, breakers, and other components described herein, as well as to mount the panel to the cabinet wall.  Sharp edges, or burrs, caused by the cutting or drilling process shall be removed.

                                                22.2.4.1            The service panel shall contain the following equipment and shall conform to the details provided herein.

• A 50 amp main circuit breaker for incoming power service
• A 20 main breaker wired to the load side of the main breaker.  This breaker shall supply power to the fan, heater, and cabinet light.
• A 20 auxiliary amp breaker wired to the load side of the main breaker.  This breaker shall supply power to four outlet handibox.
• A 20 auxiliary amp breaker wired to the load side of the main breaker. This breaker shall supply power to the terminal block mounted on the service panel
• A four outlet handibox, wired to the series portion of the SHA-1210 specified herein.
• A three position, two pole barrier type terminal block shall be provided to supply spare power.  This shall be connected to the 20 amp breaker described above.  The terminal block shall be provided with a plastic shield and each terminal shall be labeled (AC+, AC-, and GND).
• The cabinet shall be protected by filtering surge protector (EDCO Model SHA-1210 or equal).  The protector shall have the following minimum features:

Peak Current Life Test Clamp Voltage (L-N) Response Time Continuous Service Current

20,000 amps 5% change 280V @ 20 KA Voltage never exceeds 250 volts during surge 10 amps maximum 120 VAC 60 Hz

                                                22.2.4.2            The surge protector shall be mounted to the service panel as shown in the details.

                                                22.2.4.3            The service panel shall contain a neutral bus, and a ground bus described as follows. The two buses shall be isolated from each other:

• Neutral Bus - The neutral bus bar shall be a solid metallic strip rigidly mounted on the service panel.  The neutral bus shall be provided with at least 14 terminals and shall be isolated from ground bus.  All neutral conductors shall be terminated on the neutral bus.
  
• Ground Bus - The ground bus shall be a solid copper strip located as close to the bottom of the cabinet as practical.  The ground bus shall be provided with at least 14 terminals and shall be directly connected to the cabinet shell and earth ground.  The chassis ground connection to each unit in the cabinet shall be run separately and directly to the ground bus.  Multiple ground busses, as required, shall be interconnected by a minimum of #8 AWG wire.

                        22.3      METHOD OF MEASUREMENT. Cabinet & Assemblies shall be measured for payment by the number of units each, complete with all components provided as specified herein, delivered to the Department.

                        22.4      BASIS OF PAYMENT. Cabinet & Assembly will be paid at the contract unit price each, which price shall be payment in full, for furnishing a complete Cabinet & Assembly and for all labor, equipment, transportation, and incidentals necessary to complete this item of work.

23                     ITEM 23. TRAINING

                        23.1      DESCRIPTION.  Work under this item shall consist of providing qualified instructors and all materials for training Department personnel and other designated personnel in the operation and maintenance of the various equipment and components furnished under this category - ATMS Controllers and Cabinets.

                        23.2      MATERIALS.  The contractor shall develop and submit training course outlines and samples of all training aids and manuals to the engineer for approval at least forty-five (45) days prior to the proposed scheduled start of the training sessions.  Written approval of this material shall be required prior to the final scheduling of the training sessions or the final production of training materials.  Training shall not begin until after approval of the submitted training material, and a minimum of 10 working days after acceptance of the operation and maintenance manuals specified under the Item Documentation.

                        23.3      As part of this item, the Contractor shall provide three sets of all test equipment needed to perform the tests called for in this specification.  The Contractor shall also provide 3 sets of any and all test equipment needed to perform routine maintenance on the equipment furnished under this category of the specification. The training sessions described under this item shall include training on the use of the test equipment furnished by the Contractor.

                        23.4      CONSTRUCTION METHODS.  All training sessions shall be conducted at locations within Salt Lake County, Utah, to be designated by the Department.  Training sessions shall not overlap unless otherwise permitted by the Department.

                                    23.4.1   Training shall consist of formal classroom lectures as well as “hands-on” training.  "Hands-on" training shall consist of working with the actual equipment.

                                    23.4.2   Two (2) training sessions shall be provided for the equipment category and subsystem as follows:

• Type 170E controller and Test Equipment                       4 days

                                    23.4.3   A "day" of training shall consist of 6 hours.  The two sessions for each equipment category/subsystem shall be identical in content.  The training sessions shall not overlap unless otherwise permitted by the engineer.  The attendance of each session shall not be more than 30 people.  Each session shall provide a basic understanding of the equipment and subsystems and their operation and maintenance.  These training sessions shall include as appropriate, and as a minimum:

• Background on concepts of equipment/subsystem, and theory of operation.
• Functional description of subsystem equipment components.
• Procedures for installing and setting up equipment and components.
• Basic troubleshooting and fault determination procedures.
• Procedures for “mail-in” repairs.
• Preventive maintenance procedures and schedules.

                                    23.4.4   The contractor shall video tape all training sessions, and provide the tapes to the Department for training new personnel in the future.

                        23.5      METHOD of MEASUREMENT. Training will be measured as a Lump Sum which shall cover all preparation of course materials and as well as the time and human resources to provide and run the course at a location to be determined by the Department.

                        23.6      BASIS of PAYMENT.  Training, measured as provided above, will be paid for at the contract unit price Lump Sum, which price shall be full compensation for furnishing instructors and training materials; for providing the training sessions; and for all labor, equipment, transportation, and incidentals necessary to complete this item of work.

24                     ITEM 24. ENGINEERING FIELD SERVICES

                        24.1      DESCRIPTION.  The supplier shall provide on-site services when requested by UDOT, including, but not limited to:

• Fully program controllers with timing plans and settings
• Bench test systems to ensure proper operation of hardware and programming
• Provide field services for inspection of installation

                                    24.1.1   Field services shall be provided by experienced personnel familiar with use of the equipment and software. Experienced personnel shall include, but not be limited to, instructors, engineers, and field technicians.

                                    24.1.2   Payment for on-site services will be on an 8-hour "person-day" basis with a minimum order of two (2) full days.

                                    24.1.3   Time required to travel from out of state to Utah shall not be eligible for payment. Travel time within Utah between UDOT sites is included in the ‘person-day’.

                                    24.1.4   All direct costs of travel, accommodations, and meals shall be included in the unit bid price per day for on-site services. No separate payments will be made for these travel costs.

                                    24.1.5   On-site services may be required anywhere in the state of Utah. Field services will be scheduled at least two weeks in advance.

                                    24.1.6   No payment will be made for on-site services which are required to trouble-shoot or resolve problems caused by malfunctions or failures of the vendor’s equipment or for work done under warranty.

                        24.2      METHOD of MEASUREMENT. Engineering Field Services will be measured as days, with each day consisting of an eight hour ‘person-day’.

                        24.3      BASIS of PAYMENT.  Engineering Field Services, measured as provided above, will be paid for at the contract unit price per day, which price shall be full compensation for furnishing field personnel to provide engineering services; and for all labor, equipment, transportation, and incidentals necessary to complete this item of work.

25                     ITEM 25. ALLOWANCE FOR MISCELLANEOUS ITEMS

                        25.1      DESCRIPTION. Under this item, UDOT will purchase miscellaneous ATMS controller and cabinet equipment parts on an as-needed basis in small quantities. This will include spare and replacement parts.  Equipment purchased may include, but not be limited to the following:

• Controller components (modules, connectors, etc)
• Load switches
• Conflict monitors
• Detector amplifiers
• Flashers
• Flash Transfer Relays
• Harnesses
• Electronic components needed to make repairs
• Terminal blocks
• Communication modems

                                    25.1.1   A price list or catalog for miscellaneous traffic control parts,  shall be included in the proposal. Any discount offered shall be indicated.

                        25.2      METHOD of MEASUREMENT.  This Item is measured as a Lump Sum.  The value for this item is fixed as stated in the bid sheets and must be included by all bidders in calculating the total for  their proposal.

            25.3      BASIS OF PAYMENT.  Payment for equipment ordered under this item shall be made according to the price list, less any discount offered.

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