1.0 SCOPE

This Specification outlines the minimum acceptable requirements for actuated traffic signal Controller Assemblies and Outdoor Enclosures. The Controller Assembly shall include the Controller Unit, Malfunction Management Unit, Bus Interface units, Cabinet Power Supply, Load Switches, Flashers, and Detectors. The Controller Assembly and Outdoor Enclosures shall meet, as a minimum, all applicable sections of the NEMA Standards Publications No. TS 2-1992. Where differences occur, this specification shall govern.

2.0 ENVIRONMENTAL AND OPERATING STANDARDS

The Controller Assembly shall meet the minimum standard requirements as set forth in Section 2 of the NEMA Standards Publication No. TS 2-1992.

3.0 CONTROLLER UNITS

3.2 PHYSICAL STANDARDS

3.2.1 Dimensions
The Controller Unit shall be compact in design so as to fit in limited cabinet space, and shall be capable of being shelf mounted.

3.2.2 Design
The Controller Unit shall be modular in design. Circuit boards shall be vertically mounted with card guides both top and bottom. Alternatively, the circuit boards may be mounted on standoffs. The enclosure shall be designed for easy access during maintenance. It shall be permissible to accomplish this with the use of extender boards or cables. If extender boards or cables are required for maintenance of the Controller Unit 2 sets shall be supplied with every 10 (ten) Controller Units Purchased.

3.2.2.1 The enclosure shall be constructed of sheet steel or aluminum and shall be finished with an attractive and durable protective coating. Model, serial number, and date of manufacture shall be permanently displayed on the top outside surface. 3.2.3 Circuit Board Construction
All circuit boards shall meet the NEMA Standard set forth in NEMA LI-1-989, plus the following requirements.

1. All plated through holes and exposed circuit traces shall be plated with solder.
2. A solder mask shall cover both sides of the printed circuit board.
3. The circuit reference designation for all components and the polarity of all capacitors and diodes shall be clearly marked adjacent to the component. Pin 1 of all integrated circuit packages shall be designated on both sides of all circuit boards. If the designations are silk screened, epoxy-based ink shall be used.
4. Both sides of all circuit boards shall be coated with a clear moisture-proof and fungus-proof coating.
5. All electrical mating surfaces shall be gold platted.

1. The keyboard shall be clearly labeled with environmentally sealed keys. Keys and keyboard shall be large enough to allow the operator to access the Controller Unit while wearing gloves.
2. Arrow keys shall be used to move the cursor. Letter keys shall not be used for this function. Multiple use of the arrow keys shall not be acceptable.
3. Verification - The keyboard shall provide a "tactile" indication of contact when depressed. A "load check" status indicator or the display shall blink once to indicate timing parameters have been loaded into memory. An audible feedback to indicate that a key press has been registered is desirable, but not a requirement of this specification. An audible keypad function may be supplied. Means shall be provided to toggle this function ON/OFF and control volume level.

• Type 1 Controller Unit only: Connector A shall mate with MS3106 ( )-18-1S

Type 2 Controller Unit only: Connector A shall mate with MS3116( )-22-55S
Type 2 Controller Unit only: Connector B shall mate with MS3116( )-22-55P
Type 2 Controller Unit only: Connector C shall mate with MS3116( )-24-61P
• Port 1 SDLC - 15 pin metal shell D sub-miniature (gold plated female contacts)
• Port 2 RS 232 - 25 pin metal shell D sub-miniature (gold plated female contacts)
• Port 3 FSK - 9 pin metal shell D sub-miniature (gold plated male contacts)

3.4.1 The methods listed below shall be available for Controller Unit programming:

1. Manual data entry via the front panel keyboard.
2. Data down-loading via telemetry from a system master that is connected to a Personal Computer in a closed loop system.
3. Data downloading from a Personal Computer via a Modem.
4. Data downloading from a Personal Computer via a Null-Modem cable.
5. Data downloading from one Controller Unit to another using the serial port of each Controller Unit.

4.1 PHASING

1. Phase in use.
2. Locking/non-locking detector memory.
3. Vehicle recall.
4. Pedestrian recall.
5. Maximum recall.
6. Soft recall.

1. Actuated phase rest in Walk.
2. Flashing Walk output.
3. Pedestrian clearance protection during manual control.
4. Pedestrian clearance through yellow.

1. cycle length
2. offset
3. split for sixteen phases
4. permissive timing
5. coordinated phase split extension
6. alternate-phase sequence
7. phase re-service
8. split demand pattern
9. crossing artery pattern
10. coordinated phases
11. phases to omit
12. phases to be placed on recall

1. Vehicle recall
2. Pedestrian recall
3. Maximum recall

5.7.1 If actuated coordinated phases are in use, it shall be possible to re-serve non-coordinated phases within the same cycle. A phase shall be re-served only if the permissive period for the phase indicates there is sufficient time remaining in the cycle to service the phase.

1. Manual control enable
2. Stop time
3. Automatic flash
4. Preemption

1. Non-interconnected coordination (time-based)
2. Telemetry
3. Hardwired

6.1.1 The six railroad-fire-emergency vehicle preemptors shall be programmable as a priority or non-priority type. Priority preemptor calls shall override non-priority preemptor calls. Low-numbered priority preemptors shall override higher-numbered priority preemptor calls. Non-priority preemptor calls shall be serviced in the order received.

6.1.2 Each preemptor shall provide a locking and non-locking memory feature for preemptor calls. If a preemptor is in the non-locking mode and a call is received and dropped during the delay time, the preemptor shall not be serviced.

6.1.3 Preemptor timing intervals shall be programmable from a minimum range of 0-255 in one second increments or a minimum range of 0-9.99 in one-tenth second increments, depending on function.

6.1.4 A programmable delay time interval shall be provided to inhibit the start of the preemption sequence. This interval shall begin timing upon receipt of a preemption call.

6.1.5 An inhibit time shall be provided as the last portion of the delay time interval. During this time, phases that are not part of the preempt sequence shall be inhibited from service.

6.1.6 A programmable duration time shall be provided to control the minimum time that a preemptor remains active. This time shall be programmable from a minimum range of 0-255 in one second increments.

6.1.7 A programmable maximum time shall be provided to control the maximum time that a preemptor remains in the hold interval. The preemptor maximum time interval shall be inhibited if the preemptor is programmed as a priority preemptor.

6.1.8 Phases timing at the beginning of a preemption sequence shall remain in effect for a minimum time before the controller advances to the next sequential interval. If the phase has been timing for longer that the programmed preemptor minimum time, the controller shall immediately advance to the next sequential interval. Minimum times shall be programmable for the following intervals:

Green

Yellow

Red

Pedestrian clearance

Overlap yellow

6.1.9 A phase shall advance immediately to pedestrian clearance if it has been timing a WALK interval at the beginning of a preemption sequence. It shall be possible to time the minimum pedestrian clearance through the yellow interval, or alternatively to advance immediately to yellow. During preemption, pedestrian indicators shall be selectable as being a solid DON’T WALK, OFF (blank) or fully operational.

6.1.10 If an overlap is in effect when the preemption sequence begins, it shall be possible to terminate the overlap so that it remains red for the remainder of the preemption sequence. Overlaps terminating or forced to terminate shall time the preemptor minimum yellow and red clearance times.

6.1.11 Each preemptor shall provide user-programmable green, yellow and red track clearance intervals. These shall begin timing immediately after the preemptor minimum red interval.

6.1.12 Up to two permissive phases shall be selectable as track clearance phases. During the track clearance period, the selected phases shall time the track clearance green, yellow and red intervals once, and then advance to the hold interval. If track clearance phases are not selected the track clearance interval shall be omitted from the preempt sequence. Controller interval timing shall be used if track clearance interval times have been programmed as zero.

6.1.13 The preemption hold interval shall begin immediately after track clearance. It shall remain in effect until the preemptor duration time and minimum hold times have elapsed and the preemptor call has been removed or the preemptor maximum time has be exceeded. During the preemption hold interval, any one of the following conditions shall be selectable:

Hold phase green

Limited phase service

All red

Flash

6.1.14 Any valid phase, except a track clearance phase, shall be selectable as a hold phase. If hold phases are not selected, the controller shall remain in all red during the hold interval. When flash is selected for the hold interval, up to two permissive phases shall be selected to flash yellow, and the remaining phases shall flash red. Overlaps associated with the phases flashing yellow shall also flash yellow unless they have been forced to terminate, in which case they shall remain red.

6.1.15 Each preemptor shall provide a user-programmable green, yellow and red hold interval, during which the hold phase(s) shall operate normally, except that the minimum green interval time shall equal the hold green time. At the completion of the hold green interval, the Controller Unit shall time the hold yellow and red clearance intervals prior to transfer to the exit phases.

6.1.16 Up to two permissive exit phases shall be selectable to time after the preemption sequence has been completed. These shall serve as transition phases to return the Controller Unit to normal operation. It shall also be possible to place calls on selected phases upon exiting preemption.

6.1.17 Preemptor linking shall permit preemption sequences, where lower-priority preemptors may call the higher-priority preemptors upon termination of their preemption sequence.

6.1.18 Preemptor active outputs shall be provided for each of the preemptors. The output shall be set to ON when the preemption sequence begins and shall remain ON for the duration of the sequence. It shall also be possible to program preempt active outputs to be ON only during preempt hold intervals. Additionally, it shall be possible to program the non-active, non-priority preemptor outputs to false while another preemptor is active.

6.1.19 Preemptors shall normally override automatic flash. It shall be possible to inhibit this feature for each preemptor.

6.1.20 It shall be possible to program a solid yellow and red clearance time when a preemption call is received and the controller is in MUTCD FLASH or LOCAL controller flash. These timings must be possible for each phase and overlap. Examples of which, intersection is in MUTCD FLASH, phases 2 & 6 are flashing yellow and phases 4 & 8 are flashing red. A preemption call is received, phases 2 & 6 go from flash to a timed solid yellow and phases 4 & 8 go to a solid red. When phases 2 & 6 time out they go to red and the beginning of preemption begins. At the end of preemption the intersection goes through a complete color cycle and then to whichever flash is requested. The timing range shall be from 3.0 seconds for yellow clearance to a minimum of 25 seconds in 1-second intervals. The all red interval shall be from 1.0 seconds to a minimum of 9.99 seconds in 0.1-second intervals.
 

6.2.1 Four bus preemptors shall provide control for bus or other low-priority vehicles. Bus preemptors shall have low priority and shall be overridden by railroad-fire-emergency vehicle preemptor calls.

6.2.2 A 6.25 pulse-per-second signal with a 50% duty cycle shall identify a bus preemptor call. Bus preemptor calls shall be capable of preemptor call memory and shall be served in the order received.

6.2.3 As a minimum, bus preemptor timing intervals shall be programmable from a minimum range of 0-255 in one second increments or a minimum of 0-9.99 in one-tenth second increments depending on the function.

6.2.4 A re-serve time shall be provided to avoid excessive utilization of the same bus preemptor. If a call is received before the re-serve time has elapsed, the bus preemptor shall not be re-serviced. If re-service time has not been entered then all phases with a call when leaving the bus preemption sequence shall be serviced before the bus preemptor may be served again.

6.2.5 Bus preemptors shall provide delay, inhibit, and maximum time functions similar to those for railroad-fire-emergency vehicle preemptors described above.

6.2.6 Bus preemptors shall provide the following entrance intervals:

Green

Yellow

Red

Pedestrian clearance

Overlap yellow

6.2.7 At the completion of the entrance red clearance, the bus preemptor shall advance to the hold green interval. During this interval, up to two permissive phases shall be programmable to remain green until:

The minimum hold time has elapsed and the bus preemptor call has been removed.

The preemptor maximum time has be exceeded.

6.2.8 It shall be possible to program the controller to allow concurrent phases to be serviced for a bus preemptor with only one phase selected as the hold interval phase.

7.0 PREEMPTION SAFEGUARDS

7.1 If a preemptor call is active when power is restored to a Controller Unit, the fault/voltage monitor output shall be set to FALSE, placing the intersection in flash. Similarly, if external start is applied during a preemption sequence, the intersection shall be set to flash. Intersection flash shall remain in effect until the preemptor call has been removed and the preemptor duration time has elapsed.

7.1.2 Input shall be provided to stop timing of the current active preemptor under control of the MMU/CMU.

7.1.3 Preemptor safety interlock shall be provided to cause the intersection to go into flash whenever the Controller Unit has been removed or has not been programmed for preemption. This shall be achieved with an appropriate signal to the MMU/CMU.

8.0 TIME-BASED CONTROL & NON-INTERCONNECTED COORDINATION

The Controller Unit shall include time-based control. This capability shall be a standard feature and shall not require additional modules or software.

8.1.1 The controller shall provide a time-of-day (TOD) clock, which shall be used, for all time-based control functions. The only required clock settings shall be the current time (hour, minute and second) and date (month, day and year). Day of week and week of year shall be automatically computed from the date setting.

8.1.2 During normal operation, the TOD clock shall use the power line frequency as its time base. When power is removed, a crystal oscillator for up to 30 days shall maintain the time. The oscillator shall have a timing accuracy of +/- 0.005% over the entire NEMA temperature range as compared to the Universal Coordinated Time Standard.

8.1.3 In addition to entering time and date via the keyboard, it shall be possible to download the information from another controller, a computer or a system master.

8.1.4 The Controller Unit shall include a time reset input. This feature shall reset the TOD clock whenever the time reset input is TRUE.

8.1.5 The TOD clock shall automatically compensate for leap year and shall be programmable to automatically switch to daylight savings time.

8.2 TIME-BASED CONTROL

8.2.1 Time-based control shall utilize a yearly program format. The year program shall consist of a minimum of 53 programmable weeks. Each week designated to one of ten-week programs. For each week-program, one of sixteen day-programs shall be capable of being assigned for each day of the week. Each day program shall consist of a variable number of program steps that define a program for the entire day.

8.2.2 There shall be a minimum of 36 holiday or exception day programs, which override the normal day program. Holiday programs shall be capable of being set as floating (occur on a specific day of the year). It shall be possible to program a fixed holiday so that it automatically repeats in the following year.

8.2.3 Separate program step control shall be provided for non-interconnected coordination (NIC) and TOD functions.

8.2.4 It shall be possible to manually force any of the non-interconnected or TOD program steps to override the current program step. The forced step shall be entered from the keyboard and shall remain in effect until removed.

8.3 NON-INTERCONNECTED COORDINATION

8.3.1 A minimum of 100 non-interconnected coordination program steps shall be available for the day-programs. These shall not have to be entered in any special sequence. It shall be possible to add and delete steps from a day-program without affecting any other day-program. As a minimum, each of the program steps shall permit selection of the following functions:

Day program assignment

Start time

Coordination pattern

System override

8.3.2 Selection of system override shall allow the coordination pattern selected by the program to override the current telemetry or hardwired system commanded coordination pattern.

8.3.3 When operating in the non-interconnected coordination mode the synchronization point for all cycles shall be referenced to a user selected reference time (sync reference), last event of last sync as selected from the keyboard. The sync reference time is that time at which all cycles shall be reset to zero.

8.3.4 If the sync reference time is selected, the synchronization point for the cycle selected by the current program step, shall be computed using the present time, sync reference time, and cycle length periods having occurred since the sync reference time.

8.4.1 A minimum of 50 TOD program steps shall be available for the day-programs. These program steps shall be separate from the non-interconnected coordination program steps described above. TOD program steps shall not have to be entered in any special sequence. It shall be possible to add and delete steps from a day-program without affecting any other day-program. Each of the TOD program steps shall permit selection of the following functions:

Day program assignment

Start time

Automatic flash

Red rest

Dimming

Alternate vehicle extension interval

Detector logging

Detector diagnostic plan

Alternate phase sequence

Control of eight special functions

Control of the following by phase functions: Max. 2, Max. 3, Vehicle Recall, Max. Recall, Pedestrian Recall, Condition Service, and Phase Omit.

9.0 DETECTOR FUNCTIONS

9.1 The Controller Unit shall provide a minimum of 64 vehicle detector inputs. Each input shall be designated to any phase and be programmable as to detector function. Extend and delay timing shall be provided for each detector. Each detector shall be capable of operating in a lock or non-lock mode.

9.2 The Controller Unit shall provide detector cross switching, which permits all vehicle detectors to alternately place calls on their assigned phases and their assigned cross-switch phases. If the assigned phase is not green and the cross-switch phase is green, the detector shall place calls on the cross switch phase. If the coordinator omits the assigned phase, the detector shall place calls on the cross switch phase.

9.3 Each vehicle detector shall be user-programmable to operate as one of the following 7 detector types:

Type 0- Detector shall operate as a standard detector providing one call per actuation.

Type 1 Extend/Delay- Detector shall operate as follows: When the phase green and a call is detected then dropped (indicating passage of a vehicle), the extend timer shall begin timing and the call shall be held for the length of the extend time. When the phase is not green and a call is detected, the call shall not be acknowledged by the Controller Unit until the delay time has elapsed.

Type 2 Extend/Delay Call - Detector shall operate as follows: When the phase is green and a call is detected then dropped (indicating passage of a vehicle), the extend timer shall begin timing and the call shall be held for the length of the extend time. If a gap out occurs further calls shall not be placed on the Controller Unit until the delay time has elapsed. When the phase is not green the detector shall operate as a Type 0 detector.

Type 3 Stop Bar - Detector shall operate as follows: Vehicle calls shall be accepted only when the phase is not green. When a call is detected, it shall be held until the detection area is empty. Once the detection area is empty no further calls shall be accepted until the phase is again not green.

Type 4 Stop Bar - Detector shall operate as follows: Vehicle calls shall be accepted only when the phase is not green. When a call is detected, it shall be held until the detection area is empty. The extend timer shall begin timing with the phase green. Once the extend timer times-out or the detection area is empty, no further calls shall be accepted until the phase is again not green.

Type 5 Stop Bar - Detector shall operate as follows: Vehicle calls shall be accepted only when the phase is not green. When a call is detected, it shall be held until the detection area is empty. The extend timer shall begin timing with the phase green. If a call is received before the extend timer has timed-out, the timer shall be reset. Timer reset shall occur until a gap between the calls is large enough to allow the extend timer to time-out. Once time-out has occurred, no further calls shall be accepted until the phase is again not green.

Type 6 Calling - Detector shall accept one call while the phase is red.

9.4 Each detector input shall be capable of functioning as one of 8 system detectors.

9.5 Vehicle detectors shall be capable of being assigned to a minimum of 2 speed detector sets. Speed shall be detected using one or two detector configurations. When using two detectors, speed shall be calculated using a programmable distance between detectors and travel time between detectors.

9.6 The Controller Unit shall provide a minimum of 8 pedestrian detector inputs. Each pedestrian detector shall be capable of being assigned to any phase.

10.0 SYSTEM COMMUNICATIONS

The Controller Unit shall be capable of communicating with an on-street system master. A separate telemetry module shall provide this capability, which shall be included in the Controller Unit when required by the plans and specifications. The telemetry module shall receive system master commands and data transmissions. In addition, it shall transmit the Controller Unit status, data base and system detector information to the system master.

10.4 UPLOAD/DOWNLOAD CAPABILITY

All Controller Units furnished under these specifications shall be equipped with the latest release of the NEMA NTCIP communication protocol for communications between Controller Units, on-street masters, central computer systems, and closed loop systems. If Controller Units are furnished without the NTCIP due to lack of availability constraints, the contractor shall be responsible for furnishing and retrofitting the NTCIP in all Controller Units, within three months of availability, at no additional cost to Montgomery County.

12.1 The Controller Unit shall include both automatic and operator-initiated diagnostics. This capability shall be a standard feature and shall not require additional modules or software.

12.2 Automatic diagnostics shall verify memory, MMU compatibility programming, and microprocessor operation each time power is reapplied to the Controller Unit. After power has been applied, diagnostics shall continually verify the operation of essential elements of the Controller Unit including at a minimum: PROM, EEPROM, communications, and the microprocessor.

12.3 Operator initiated diagnostics shall allow the operator to verify proper operation of all Controller Unit input, output, communications, keyboard, and display functions. Both manual and automatic test modes shall be provided.

12.4 DETECTOR DIAGNOSTICS

The Controller Unit shall be capable of logging and reporting detector activity, detector failures, and the occurrence of selected events or alarms. Logs shall be capable of being printed or displayed on the front of the Controller Unit.

13.1 DETECTOR LOGGING

1.0 INTRODUCTION

This specification sets forth the minimum requirements for a shelf-mountable, sixteen channel, solid-state Malfunction Management Unit (MMU). The MMU shall meet, as a minimum, all applicable sections of the NEMA Standards Publication No. TS 2-1992. An independent testing laboratory shall verify that the MMU will perform all its defined functions under the conditions set forth in Section 2 of the NEMA STANDARD (Environmental Standards and Test Procedures). Where differences occur, this specification shall govern.

2.0 HARDWARE

2.1 ENCLOSURE

2.1.1 The MMU shall be compact so as to fit in limited cabinet space. It shall be installed on a shelf that is at least 10" deep. Overall dimensions, including mating connectors and harness, shall not exceed 10.5" x 4.5 x 11" (H x W x D).

2.1.2 The enclosure shall be constructed of sheet aluminum with a minimum thickness of 0.062", and shall be finished with an attractive and durable protective coating. Model, serial number, and program information shall be permanently displayed on the rear surface.

2.2 ELECTRONICS

2.2.1 A microprocessor shall be used for all timing and control functions. Continuing operation of the microprocessor shall be verified by and independent monitor circuit, which shall force the OUTPUT RELAY to the de-energized "fault" state and indicate an error message if a pulse is not received from the microprocessor within a defined period.

2.2.2 In the interest of reliability, only the PROM memory device for the microprocessor firmware shall be socket mounted. The PROM Memory socket shall be a precision screw machine type socket with a gold contact finish providing a reliable gas tight seal. Low insertion force sockets or sockets with "wiper" type contacts shall not be acceptable.

2.2.3 A built-in high-efficiency power supply shall generate all required internal voltages. All voltages shall be regulated and shall be monitored with control signals. Failure of the internal power supply to provide proper operating voltages shall force the OUTPUT RELAY to the de-energized "fault" state and indicate an error message. A front panel mounted fuse shall be provided for the 120 VAC input.

2.2.4 User-programmed configuration settings shall be stored in an electrically erasable programmable read-only memory (EEPROM) or via front panel DIP switches. Designs using a battery to maintain configuration data shall not be acceptable.

2.2.5 All 120 VAC field terminal inputs shall provide an input impedance of at least 150K ohms and be terminated with a resistor having a power dissipation rating of 0.5 Watts or greater. A separate precision voltage-comparing device shall sense each 120 VAC field terminal input.

2.2.6 All electrical components used in the MMU shall be rated by the component manufacturer to operate over the full NEMA temperature range of -30 degree C to +74 degree C.

2.2.7 All printed circuit boards shall meet the requirements of the NEMA Standard plus the following requirements to enhance reliability:

All plated-through holes and exposed circuit traces shall be plated with solder.

Both sides of the printed circuit board shall be covered with a solder mask material.

The circuit reference designation for all components and the polarity of all capacitors and diodes shall be clearly marked adjacent to the component. Pin #1 for all integrated circuit packages shall be designated on both sides of all printed circuit boards.

All electrical mating surfaces shall be gold plated.

All printed circuit board assemblies shall be coated on both sides with a clear moisture-proof and fungus-proof sealant.

2.3.1 All displays, configuration switches, and connectors shall be mounted on the front panel of the MMU. All MMU configuration inputs beyond those required by the NEMA Standard shall be provided by front panel mounted DIP switches and shall be clearly labeled. Configuration DIP switches shall be provided for the following functions:

Field Check / Dual Enables 1-16

Green / Yellow - Dual Indication Enable

BND Test Disable

External Watchdog Enable

2.3.2 The connectors on the MMU shall have a metallic shell and be attached to the chassis internally. They shall be manufactured to meet MIL-C 26482 specifications. The connectors shall be mounted on the front of the unit in accordance with the following: Connector A shall mate with a MS 3116 22-55 SZ, and Connector B shall mate with a MS 3116 16-26 S.

2.3.2.1 In the interest of reliability and reparability, printed circuit board mounted MS connectors shall not be acceptable. Internal MS harness wire shall be a minimum of AWG #22, 19 strand.

2.3.3 All indicator lights shall be water clear, T-1 package, Red Super Bright type LED’s. Indicators shall be provided for the following items:

Channel Status 1-16

Conflict

Red Fail

CVM / External Watchdog

24V-2

24V-1

Clearance Fail

Port 1 Fail

Diagnostic / Program Card

Dual Indication

Type 12 mode

Power

Port 1 Receive

Port 2 Transmit

2.4 OPERATING MODES

2.4.1 The MMU shall operate in both the Type 12 mode and Type 16 mode as required by the NEMA Standard.

The following monitoring functions shall be provided in addition to those required by the NEMA Standard Section 4.

3.1 DUAL INDICATION MONITORING

3.1.1 Sixteen switches labeled FIELD CHECK / DUAL ENABLES shall be provided on the MMU front panel to enable Dual Indication Monitoring on a per channel basis. The Dual Indication Monitor function shall provide two modes of operation, Dual Indication Fault and Green/Yellow - Dual Indication Fault.

3.1.2 When voltages on two inputs of a channel are sensed as active for more than 1000 msec, the MMU shall enter the fault mode, transfer the OUTPUT relay contacts to the FAULT position, and illuminate the DUAL INDICATION indicator. The MMU shall remain in the fault mode until the RESET button or the EXTERNAL RESET input resets the unit. When voltages on two inputs of a channel are sensed as active for less than 700 msec, the MMU shall not transfer the OUTPUT relay contacts to the FAULT position.

3.1.3 When operating in the Type 16 mode with Port 1 communications enabled, Bit #68 (Spare Bit #2) of the Type #129 response frame shall be set to indicate a Dual Indication fault has been detected.

3.1.4 Dual Indication Monitoring shall be disabled when the RED ENABLE is not active. When operating in the Type 16 mode with Port 1 communications enabled, Dual Indication Monitoring shall also be disabled if the LOAD SWITCH FLASH bit is set to "1" in the Type #0 message from the Controller Unit.

3.2.1 Dual Indication monitoring shall detect simultaneous input combinations of active Green (Walk), Yellow, or Red (Don’t Walk) field signal inputs on the same channel. In Type 12 mode this monitoring function detects simultaneous input combinations of active Green and Yellow, Green and Red, Yellow and Red, Walk and Yellow, or Walk and Red field inputs on the same channel.

3.3.1 Sixteen switches labeled FIELD CHECK/DUAL ENABLES shall be provided on the MMU front panel to enable Field Check Monitoring on a per channel basis. The Field Check Monitor function shall provide two modes of operation, Field Check Fault and Field Check Status.

3.3.2 Field Check Monitoring shall be disabled when the RED ENABLE input is not active. When operating in the Type 16 mode with Port 1 communications enabled, Field Check Monitoring shall also be disabled if the LOAD SWITCH FLASH bit is set to "1" in the Type #0 message from the Controller Unit. The Field Check Monitoring function shall be disabled in the Type 12 mode.

3.4.1 The MMU shall provide the capability to monitor an optional external logic level output from a Controller Unit or other external cabinet circuitry. If the MMU does not receive a change in state on the EXTERNAL WATCHDOG input for 1500 msec ( +100 msec), the MMU shall enter the fault mode, transfer the OUTPUT relay contacts to the FAULT position, and illuminate the CVM / WATCHDOG indicator. The MMU shall remain in the fault mode until the RESET button or the EXTERNAL RESET input resets the unit. An MMU Power Failure shall reset the CVM / WATCHDOG fault state of the monitor.

3.4.2 When operating in the Type 6 mode with Port 1 communications enabled, Bit #70 (Spare Bit #4) of the Type #129 response frame shall be set to indicate an External Watchdog fault has been detected.

3.5.1 The MMU shall verify at power-up that the Type 12 or Type 16 operating mode as determined by the TYPE SELECT input that is consistent with the mode set by the last external reset.

3.5.2 Detection of a Type Fault shall place the MMU into the fault mode, transfer the OUTPUT relay contacts to the FAULT position, illuminate the DIAGNOSTIC indicator, and flash the Type 12 indicator at a 2 Hz rate. The MMU shall remain in the fault mode until the RESET button or the EXTERNAL RESET input resets the unit. An MMU Power Failure shall reset the Type Fault State of the monitor.

The following display functions shall be provided in addition to those required by the NEMA Standard Section 4.

4.1.1 The MMU Channel Status display shall indicate with a steadily illuminated LED indicator, those channels which had the short Yellow plus Red interval (i.e., those channels which did not meet the minimum Yellow Change plus Red Clearance Interval). The conflicting channel(s) which was sensed active Green causing the Minimum Yellow Change plus Red Clearance Fault shall also be indicated with a single pulsed LED indicator.

4.2.1 The FIELD CHECK FAIL indicator shall illuminate when a Field Check Fault is detected. The Channel Status display shall show the channels on which the Field Check fault occurred.

4.2.2 If Field Check errors occurred during a Conflict Fault, Red Fail, Clearance Fail, or Dual Indication Fail the FIELD CHECK FAIL indicator shall illuminate and double pulse every 2 seconds. The channels on which the Field Check Status was detected during the fault shall double pulse on the Channel Status Display at the same time as the FIELD CHECK FAIL indicator.

The following display indicators shall be provided in addition to those required by the NEMA Standard Section 4.

4.3.1 The TYPE 12 indicator shall illuminate when the MMU is programmed for Type 12 operation. If a Type Fault is detected the DIAGNOSTIC / PGM CARD indicator shall illuminate and the TYPE 12 indicator shall flash at a rate of 2 Hz.

4.3.2 The BND FAIL indicator shall illuminate when a BND Fault is detected. The Channel Status display shall show the channels that were detected as BND Fail.

4.3.3 The DUAL INDICATION indicator shall illuminate when a DUAL INDICATION Fault is detected. The Channel Status display shall show the channels that were detected as DUAL INDICATION.

4.3.4 The POWER indicator shall flash at a rate of 2 Hz when the AC LINE voltage is below the dropout level. It shall illuminate steadily when the AC LINE voltage returns above the restore level.

4.3.5 The RECEIVE indicator shall illuminate for a 33 msec pulse each time a Port 1 message is correctly received from the Controller Unit.

4.3.6 The TRANSMIT indicator shall illuminate whenever the MMU has the Port 1 transmitter enabled.

4.3.7 The DIAGNOSTIC / PGM CARD indicator shall flash at a 2 Hz rate if the Programming Card is absent or not seated properly in its mating connector.

5.1 The MMU shall include both automatic and operator initiated diagnostics.

5.1.1 Automatic diagnostics shall verify memory and microprocessor operation each time power is reapplied to the MMU. After power has been applied, diagnostics shall continually verify the operation of essential elements of the MMU including at a minimum: PROM, EEPROM, communications, internal power supply, and the microprocessor.

5.1.2 Operator initiated diagnostics shall allow the operator to verify proper operation of all indicator lights, PROM, EEPROM, RAM, and microprocessor.

1.0 INTRODUCTION

The TS 2 cabinet power supply shall provide regulated DC power, unregulated AC power and a line frequency reference for the TS 2-detector rack, Bus Interface Units, load switches, and other auxiliary equipment. As a minimum, the power supply shall meet all applicable requirements of the NEMA TS2-1992 Standard. Where differences occur, this specification shall govern.

2.0 ENCLOSURE

2.1 The power supply shall be compact so as to fit in limited cabinet space. It shall be capable of being mounted on a shelf. In addition, the power supply shall be capable of being wall mounted using key-hole slots on the rear of the power enclosure.

2.2 The power supply shall be constructed of sheet aluminum and shall be finished with an attractive and durable protective coating.

3.1 MATERIALS

All printed circuit boards shall be made from NEMA FR.-4 glass epoxy or equivalent (see NEMA LI--1989 Industrial Laminated Thermosetting Products).

All printed circuit boards shall meet the following requirements to enhance reliability:

All plated-through holes and exposed circuit traces shall be plated with solder.

Both sides of the printed circuit board shall be covered with a solder mask material.

The circuit reference designation for all components and the polarity of all capacitors and diodes shall be clearly marked adjacent to the component. Pin 1 for all integrated circuit packages shall be designated on both sides of all printed circuit boards.

All electrical mating surfaces shall be gold plated.

All printed circuit board assemblies shall be coated on both sides with a clear moisture-proof and fungus-proof sealant.

The power supply shall perform its specified functions when the ambient temperature and humidity are within the specified limits defined in section 2 of NEMA TS2-1992 Standard.

As a minimum, the electrical requirements shall follow those described in section 5 of the NEMA TS2-1992 Standard, plus all other applicable sections.

6.1 PIN CONNECTIONS

The power supply connector shall be located on the front of the unit, have a metallic shell which is connected to the chassis ground internally and mate with an MS3106 ( )-18 -1SW cable connector, or equivalent.

Connector pin terminations shall be as follows:

7.0 INDICATORS AND TEST POINTS

7.1 Indicators

The power supply shall include LED indicators to display the status of all outputs.

7.2 Test Points

The power supply shall include banana jack style test points for the following signals:

• +24 VDC
• Logic Ground

The functions of each power supply shall be thoroughly tested to insure compliance with the requirements of this specification. Upon completion of initial tests, each power supply shall be burned in at a minimum of 74 degrees C for 48 hours. After burn-in, the functions of the power supply shall be re-tested to insure satisfactory operation.

1.0 SCOPE

This specification sets forth the minimum requirements for a control cabinet assembly. The cabinet assembly shall meet, as a minimum, all applicable sections of the NEMA Standard Publication No. TS-2-1992. All cabinets shall meet the requirements of a NEMA 3R rating, and shall be U. L. listed as an entire unit. Where differences occur, this specification shall govern.

2.0 CABINET DESIGN AND CONSTRUCTION

2.1 GENERAL

2.1.1 The cabinet and door(s) shall be constructed from type 5052-H32 aluminum with a minimum thickness of 0.125 inches. The top, door, and each side of the cabinet shall each be a single sheet of aluminum. Welding pieces together to form any of these surfaces shall not be permitted. External welds shall be made by using the Heliarc welding method, whereas internal welds will be made by the wire welding method. All welds shall be neatly formed and free of cracks, blowholes and other irregularities.

2.1.2 All inside and outside edges of the cabinet shall be free of burrs. All sharp edges shall be made smooth.

2.1.3 The cabinet shall be designed and manufactured with materials that will allow ridged mounting, whether intended for pole, base or pedestal mounting. The cabinet must not flex on its mounting.

2.1.4 A rain channel shall be incorporated on all four (4) sides of the main door opening to prevent liquids from entering the enclosure. Cabinet door openings shall be double flanged outward on all four (4) sides to produce the rain channel.

2.1.5 The top of the cabinet shall incorporate a 1 (inch) slope toward the rear to prevent rain accumulation.

2.1.6 The cabinet shall be supplied with a natural aluminum finish. Sufficient care shall be taken in handling to ensure that scratches are minimized. All surfaces shall be cleaned of all oil residue and shall be free from weld flash.

2.1.7 All interior seams shall be sealed with RTV sealant or equivalent material.

2.1.8 All cabinets shall be supplied with two removable shelves manufactured from 5052-H32 aluminum having a minimum thickness of 0.125 inches. Shelves shall have a minimum depth of 10.5 inches.

2.1.9 One set of vertical "C" channels shall be mounted on each interior wall of the cabinet for the purpose of mounting the cabinet components. The size six-(6) cabinets shall have an additional set of channels mounted on the left and right side walls. The mounting channels shall provide infinite horizontal and vertical adjustments of mounted equipment and shelves. The channels shall accommodate spring-mounted nuts or studs. All mounting rails shall extend to within four (4) inches of the top and bottom of the cabinets. Rivets or pop-rivets of any kind shall not be used in the cabinet or on the main panel. No bolts or screws shall protrude through the outside walls, top, bottom, or sides of the cabinet.

2.1.10 All cabinets shall be supplied with four (4) anchor bolts to properly secure the cabinet to its base.
 

2.1.10.1 Bolt patterns for the size 5 cabinets shall be as shown in Figure 7.8.3.1 of the NEMA Standards, except there shall be two (2) additional mounting slots centered in the right and left side mounting flanges.

2.1.10.2 Bolt patterns for the size 6 cabinets shall be as shown in Figure 7.8.3-2 of the NEMA Standards.

2.1.11 The cabinet shall have an open bottom that is surrounded by a heavy duty attachment flange (lip) made of double thickness material having a minimum thickness or 0.25 inches. Around the opening, the flange shall be three (3) inches wide, plus or minus one-half (1/2) inch. One inch slots shall be provided in all four corners for the anchor bolts or for securing the removable bottom panel of pole mounted cabinets.

2.1.12 All size 5 cabinets shall be provided with stiffener plates Made from 0.250 inch aluminum and tack welded to the top and bottom of the rear wall to allow pole mounting.

2.1.13 All size 5 cabinets shall be fitted with a removable 0.250-inch thick bottom panel. The bottom panel of the cabinet shall be removable to allow the cabinet to be used as a base mount type if desired. A closed cell neoprene pad having a minimum thickness or 0.5 inches shall be installed between the cabinet and the bottom panel to prevent dust and moisture from entering the cabinet. The pad shall cover the entire cabinet opening to the outside edges of the cabinet. Montgomery County personnel shall cut holes for conduits.

2.1.14 Each cabinet shall be of sufficient size to accommodate all equipment without crowding. Each piece of equipment shall have its own space on a shelf. It shall not be necessary to move any other piece of equipment in order to service any component or unit. All auxiliary equipment shall be accessible for removal or installation without moving any other component in the cabinet. The minimum cabinet sizes are as follows:

• Size 5 cabinets -- 50" H x 36" W x 17" D

• Size 6 cabinets -- 55" H x 44" W x 26" D

2.1.15 For reference size 5 cabinets shall be pole-mounted cabinets. All pole-mounting hardware shall be supplied and shall be made of rustproof material. Top and bottom mounting brackets shall be supplied and shall permit the use of two (2) bands on each bracket (for secure mounting). Mounting brackets shall allow the use of a minimum of 3/4-inch wide bands.

2.1.16 All size 5 cabinets shall be supplied with an Extender Base that is at least 15 Inches in height. The extender base shall be made of 5052-H32 aluminum having a minimum thickness of 0.125 inch. The top and bottom opening shall match the bottom of the cabinet and shall have the same mounting bolt pattern as the cabinet. Extender base, mounting bolts and gasket shall be supplied as one unit and separate from the size 5 cabinets.

2.1.17 All cabinets shall be equipped with a three- (3) position alarm and light switch bracket. This bracket shall be attached to the top right corner of the door opening.
 

2.2.1 A stiffener plate shall be welded across the inside of the main door to prevent flexing. The stiffener plate shall not cover or prevent access to any door component(s).

2.2.2 The lower section of the cabinet door shall be equipped with a louvered air entrance. The air inlet shall be large enough to allow sufficient airflow per the rated fan capacity. Louvers must satisfy the NEMA rod entry test for 3R ventilated enclosures. A removable fiberglass, air filter shall be supplied with each cabinet. The filter shall be secured to the air entrance in such fashion as to maintain close contact, at all times, to the louvered air entrance. The filter retainer shall be a slide fit design with no bolts or springs utilized to secure the filter to the door opening.

2.2.3 The roof of the cabinet shall incorporate an exhaust plenum with a vent screen. Perforations in the vent screen shall not exceed 0.125 inches in diameter.

2.2.4 The main door shall be equipped with a three-point draw roller type latching mechanism. The push rods shall be turned edgewise at the outward supports and shall be 0.250 inch by 0.750 inch aluminum, minimum. The push rods shall maintain a uniform thickness along their entire length. A reduction in thickness at the center latch point shall not be accepted.

2.2.4.1 Rollers shall have a minimum diameter of 0.875 inch and will be made of nylon. The center catch shall be fabricated from 0.187 aluminum, minimum.

2.2.5 The handle on the main door shall utilize a stainless steel shank of 5/8 inches minimum diameter. The handle shall include a hasp for the attachment of an optional padlock. The cabinet door handle shall rotate counter-clockwise to open. The handle shall not extend beyond the perimeter of the main door at any time. The lock assembly shall be positioned so that the handle shall not cause any interference with the key when opening the cabinet door. When the door is closed and latched, the door shall automatically lock. It shall not be necessary to use a key in order to lock the door.

2.2.6 The main cabinet and police panel door hinges shall be a one-piece, continuous piano hinge. The hinge shall be located on the right side of the door when viewed from the front. The hinge and pin shall run the entire length of the door. All cabinet and police panel door hinge pins shall be capped at the top and bottom by weld to render the pin tamper proof.

2.3 POLICE SWITCH COMPARTMENT

2.3.1 A switch compartment shall be provided on the main door.

2.3.2 The opening for the switch compartment door shall be double flanged on all four sides and shall incorporate a rain channel on all four sides.
2.3.3 The police door-in-door shall be provided with a treasury type lock Corbin No. R357SGS series,or approved equivalent. The lock shall be of brass construction, and shall have a swing away cover. All cabinets shall have a police panel door that utilizes a slam shut type latching mechanism. Two police keys shall be supplied and attached to each cabinet door upon shipment.

2.3.4 The door hinge for the switch compartment shall be 0.063-inch stainless steel with a 0.120-inch diameter stainless steel hinge pin.
 

3.1 The main panel shall be constructed from 5052-H32 brushed aluminum of 0.090 inches minimum thickness and formed so as to minimize any flexing when plug-in components are installed.

3.2 All main panels shall be hinged at the bottom to allow easy access to all wiring on the rear of the panel. The cabinet back panel conductors shall be arranged to allow the top of the panel to be tilted out through the main cabinet door. Removal or disconnecting of any conductors or equipment mounted on the side walls of the cabinet shall not be necessary.

3.3 The main panels shall be fully wired in the following configurations:

Type 1 Configuration 3 -- Twelve load switch sockets, (eight vehicle sockets and four pedestrian sockets) six flash transfer relay sockets, one flasher socket, and two main panel BIU rack positions. This configuration shall be installed into all size five (5) cabinets.

Type 1 Configuration 4-- Sixteen load switch sockets, (eight vehicle sockets, four pedestrian sockets and four overlap sockets) eight flash transfer relay sockets, one flasher socket and two main panel BIU rack positions. This configuration shall be installed into all size six (6) cabinets.

Type 2 Configuration 3 -- Twelve load switch sockets, (eight vehicle sockets and four pedestrian sockets) six flash transfer relay sockets, one flasher socket. This configuration shall be installed into all size five (5) cabinets.

Type 2 Configuration 4 - Sixteen load switch sockets, eight vehicle sockets, four pedestrian sockets and four overlap sockets) eight flash transfer relay sockets. This configuration shall be installed into all size six (6) cabinets.

3.4 Reference designators for all load switch and flash transfer relay sockets shall be silk-screen labeled on the front and rear of the main panel.

Up to eight load switch sockets may be positioned horizontally or stacked in two rows on the main panel. If more than eight load switch sockets are required they shall be mounted in two horizontal rows. All load switch sockets, flasher sockets, and flash transfer sockets shall be mounted on the main panel only.

3.6 A bracket extending at least half the length of the load switch shall support all load switches. This support must be rigidly mounted to the main panel and be removable for maintenance by using hand tools only.

3.7 In Type 1 Main Panels rack style mounting shall be provided to accommodate the required BIU’s per the configuration listed in section 3.3 above. A duel -- row, 64 -- pin female din 41612 Type B connector shall be provided for each BIU rack position. Card guides shall be provided for both edges of the BIU. Terminal and facilities BIU mounting shall be an integral part of the main panel. Detector rack BIU mounting shall be an integral part of the detector rack.

3.7.1 In Type 1 Main Panels all BIU rack connectors shall have pre-wired address pins corresponding to the requirements of the TS 2 Specification. The address pins shall control the BIU mode of operation. BIU’s shall be capable of being interchanged with no additional programming.

3.8 All twelve position main panels shall have all field wires terminated on one row of horizontally mounted terminal blocks. All sixteen position main panels shall have all field wires terminated within one or two rows of horizontally mounted terminal blocks. If two rows are used, the upper row shall be wired for the pedestrian and overlap field terminations. The lower row shall be reserved for phase one through eight vehicle field terminations.

3.9 All field output circuits shall be terminated on a non-fused terminal block with a minimum rating of 20 amps.

3.10 All Type 2 Main panels shall provide means of programming the controller phase outputs to load switch inputs with only the use of a screwdriver.

3.11 Permanent alphanumerical labels shall identify all field input/output (I/O) terminals. All labels shall use standard nomenclature per the NEMA TS 2 Specification.

3.11.1 Type 1 Main Panels shall have as a minimum, terminals provided for the input/output signals listed in table 5.3.1—2 for terminal facilities configurations 3 and 4 of NEMA TS2—1992.

3.11.2 Type 2 Main Panels shall have as a minimum, sufficient screw terminals shall be provided for the termination of the input/output functions described in section 5.3.2 of the TS2—1992 standard.

3.12 All flash color selection shall be accomplished at the field terminals with the use of a screwdriver only. It shall also be possible to select, through terminal connections, which of the two flasher circuits is connected to each phase. All cabinets shall be wired so that flasher circuit output #1 shall be wired for phases 2, 3, 6, and 7, overlap B and overlap D. Flasher output circuit #2 shall be wired for phases 1, 4, 5, and 8, overlap A and overlap C. All cabinets shall be pre-wired to flash phases 2 and 6 yellow and all other phases and overlaps red.

3.13 Field terminal blocks shall be wired to use a minimum of three positions per vehicle, pedestrian and overlap phase. All bolts and screws used for electrical connections shall be stainless steel. All equipment grounds shall run directly and independently to the Earth ground bus bar. All neutral conductors shall be carried throughout the cabinet without a break, splice, or fuse unless otherwise noted. A separate insulated Neutral Bus Bar with a minimum of twenty positions or terminals sized to allow three #12 wires per terminal shall be mounted to the main panel. A separate insulated Earth Ground Bus Bar with a minimum of ten positions or terminals sized to allow three #12 wires per terminal shall be mounted to the main panel. The mounting of each bus bar shall be ridged with minimal flexing at all points on the bar.

3.13.1 Signal output terminals shall be screw type, Compression type termination shall not be acceptable. . 3.14 The main panel shall contain a flasher capable of operating a 15-amp, 2-pole, NEMA solid state flasher. A bracket that extends at least half its length shall support the flasher.

3.15 As a minimum, a RC network shall be wired in parallel with each group of three flash-transfer relay coils. A RC network shall be installed on all other relay coils.

3.16 All logic-level, NEMA Controller Unit and Malfunction Management Unit input and output terminations on the main panel shall be permanently labeled. Cabinet prints shall identify the function of each terminal position. All screws and terminals shall be made of stainless steel.

3.17 Type 1 Main Panel terminal blocks for DC signal interfacing shall have a number 6-32 x 7/32-inch screw as a minimum. All screws and terminals shall be made of stainless steel. Functions to be terminated shall be as specified in the listing of input/output Terminals in the NEMA TS2--1992 Standard document (Section 5).

3.18 Type 2 Main Panels shall have as a minimum, terminal blocks shall be provided at the top of the main panel to provide access to the Controller Unit’s programmable and non-programmable inputs and outputs. Terminal blocks for DC signal interfacing shall have a # 6-32 x 7/32-inch screw minimum. All screws and terminals shall be made of stainless steel.

3.19 All main panel wiring shall conform to the following wire size and color:
 

Green or Walk load switch output	brown wire	16 AWG
Yellow load switch output	yellow wire	16 AWG
Red / Don’t Walk load switch output	red wire	16 AWG
MMU (other than AC power)	optional color	22 AWG
Controller Unit Input / Output	blue wire	22 AWG
AC Line (power panel to main panel)	black wire	***
AC Line (main panel)	black wire	***
AC Neutral (power panel to main panel)	white wire	***
AC Neutral (main panel)	white wire	***
Earth ground (power panel)	green wire	***
Logic ground	gray wire	22 AWG
*** Gauge varies with power panel / main panel set.  Unless otherwise noted, wire size shall comply with NEMA Standard TS 2 - 1992 Table 5.2.5-1.

 

3.20 All wiring, 14 AWG and smaller, shall conform to MIL-W-16878/1, type B/N, 600V, 19-strand tinned copper. The wire shall have a minimum of 0.010 inches thick PVC insulation with clear nylon jacket and rated to 105 degrees Celsius. All 12 AWG and larger wire shall have UL listed THHN / THWN 90 degrees Celsius, 600 V, 0.020 inches thick PVC insulation and clear nylon jacketed.

3.21 All Controller Unit and Malfunction Management Unit cables shall be of sufficient length to allow the units to be placed on either shelf or the outside top of the cabinet in the operating mode. Connecting cables shall be sleeved in a braided nylon mesh. The use of exposed tie-wraps or interwoven cables are unacceptable.

3.22 All cabinet configurations shall be provided with enough RS-485 Port 1 communication cables to allow full capabilities of that cabinet. Each communication cable connector shall be a 15-pin metal shell D sub-miniature type. The cable shall be a shielded cable suitable for RS-485 communications.

3.23 All main panels shall be pre-wired for a Type-16 Malfunction Management Unit.

3.24 All wiring shall be neat in appearance. All cabinet wiring shall be continuous from its point of origin to its termination point. Butt type connections/splices are not acceptable. All cabinet back panel conductors shall be soldered, at its destination point as specified. Printed circuit boards, except for BIU rack and pedestrian isolation boards, shall not be used on main panels.

3.25 All connecting cables and wire runs shall be secured by mechanical clamps. Stick-on type clamps are not acceptable.

3.26 The grounding system in the cabinet shall be divided into three separate circuits (AC Neutral, Earth Ground, and Logic Ground). These ground circuits shall NOT be connected together at a single point as outlined in the NEMA TS 2 Standard.

3.27 All pedestrian push-button inputs from the field to the controller shall be opto-isolated and operate at 12 VAC.

3.28 All wire (size 16 AWG or smaller) at solder joints shall be hooked or looped around the eyelet or terminal prior to soldering to ensure circuit integrity. Lap joint soldering is not acceptable. All connections to other than solder connections shall be made with insulated spade connectors.

3.29 All exposed or protruding 120 VAC terminals or screws shall be covered or shielded to prevent shock hazard to personnel.

3.30 All conductors used in cabinet wiring shall be identified by the use of a pre-printed sleeve or wire marker clearly visible and before attachment to a lug, terminal or making a connection. All unused wires shall be terminated and labeled at a terminal strip. The tying back of unused wires is not acceptable. All wiring harnesses shall be encased in a continuous mesh sheath. The use of cable ties to arrange wiring harnesses is not acceptable. All conductors and wiring harnesses shall be routed and arranged to allow easy access to all equipment and terminals.

3.31 The main panel shall incorporate a relay to remove +24VCD from the common side of the load switches when the intersection is placed into flash. The main panel shall incorporate a relay or interlock that will initiate stop time to the controller on ring 1 and ring 2 whenever the intersection goes into a "conflict flash" condition. The relays mention above shall be Potter & Brumfield, Model KRAP-N11AG-120V or approved equal.

4.0 POWER PANEL DESIGN AND CONSTRUCTION

4.1 The power panel shall consist of a separate, fully enclosed module, securely fastened to the lower right side wall of the cabinet. The power panel shall be wired to provide the necessary power to the cabinet, controller, Malfunction Management Unit, cabinet power supply and auxiliary equipment. It shall be manufactured from 0.090 inch, 5052-H32 aluminum with removable plastic front cover. Means shall be provided to allow access to the main and auxiliary breakers without removing the front cover. All components of the power panel shall be accessible for ease of replacement without removing any other components or equipment. Adequate space between components shall be provided for the tightening of all terminals.

4.2 The power panel shall be identical for all cabinets except for breaker sizing. The power panel shall house the following components:

All circuit breakers shall be single pole Square-D or approved equivalent and supplied in a Q.O.U. mounting. The main breaker shall be labeled "MAIN". A 30-amp main breaker for 12-position cabinets and a 40-amp breaker for 16 position cabinets. This breaker shall supply power to the controller, MMU, signals, cabinet power supply, isolation transformer, and separate breakers used to split the power feed and auxiliary panels. Breakers shall be thermal magnetic type, UL listed for HACR service, with a minimum of 10,000 amp interrupting capacity. All breakers shall be installed in a vertical orientation.

One (1) single pole fifteen amp (15-amp) breaker labeled "Auxiliary" shall supply power to the fans, lights and GFCI outlet. The power feed for this breaker shall not be fed from the load side of the main breaker but will be fed from the main feed side.

One (1) single pole fifteen amp (15-amp) breaker shall supply power to a SOLA CVS SERIES CONSTANT VOLTAGE TRANSFORMER TYPE 23-23-125-8 which shall be called (isolation transformer) throughout these specifications. No substitution shall be allowed. The isolation transformer shall be mounted inside the cabinet on the right side of the cabinet wall above the power panel. This breaker shall be labeled "ELECTRONIC EQUIPMENT". The power feed for this breaker shall be from the "line out equipment" side of the power line surge protector (EDCO Surrestor SHP-300-10). No substitute shall be allowed. The "neutral equipment" side of the same SHP-300-10 shall be wired to the neutral input of the isolation transformer. The load side of the isolation transformer both AC+ and AC- (neutral) shall power the Controller Unit, Malfunction Management Unit, Power Supply, and the Lau Panel and no other equipment.

A 50 amp, 125 VAC radio interference line filter.

A normally open, 60-amp, mercury contactor Durakool model BBC-7032 or exact equivalent.

One (1) Insulated AC Neutral bus bar with a minimum of twelve (12) positions capable of accepting three #12 wires per position.

One (1) Earth ground bus bar (chassis ground) with a minimum of seven (7) positions large enough to accept three #12 wires per position.

A NEMA type 5-15R GFCI convenience outlet wired as specified.

A six (6) position (minimum) terminal block shall be provided for the termination of the AC+ Feed to the cabinet, the AC- Neutral Feed to the cabinet and the Earth Ground or (Chassis Ground) to the cabinet. A single hole compression lug capable of accepting as a minimum #10 AWG to a maximum #4 AWG wire shall be provided for each termination. The compression lug shall be a screwdriver slot type rated for copper wire. Four (4) terminal lugs shall be provided for each cabinet. These lugs shall be protected with a transparent cover. Means shall be provided for installing or tighten the cabinet service feeds without removing the protective cover.

The AC neutral bus, earth ground bus and DC logic ground shall "NOT" be electrically connected and shall be electrically isolated from each other within the cabinet wiring in lieu of NEMA TS 2-1992 FIGURE 5.4.2-1 conductors indicated.

END OF SECTION FOUR

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1.0 AUXILIARY CABINET EQUIPMENT

1.1 The cabinet shall be provided with two thermostatically controlled (adjustable between 80-150 degreeåhrenheit) ventilation fans in the top of the cabinet plenum. Each fan shall be a ball bearing type fan and shall be capable of drawing a minimum of 100 cubic feet of air per minute. The fans shall have a minimum design life of one hundred thousand (100,000) hours. Each fan shall have its own thermostat, fan and thermostat shall be rated for one hundred and twenty-five percent (125%) of capacity. Each fan and thermostat assemble shall be fused. All fuse holders shall be of the encased type.

1.2 A 25-watt R-25 plated metallic gooseneck incandescent lamp fixture mounted on a 14-inch flexible arm shall be included. The flexible arm shall be permanently mounted on the lower right side to sufficiently illuminate the field terminals. A rotary type switch, used to activate this lamp shall be provided and installed on the rear of the lamp housing. The lamp shall be wired to a door-activated switch mounted near the top of the door. If the toggle switch is ON and the main door is closed the lamp will be off. If the rotary switch is ON and the main door is closed the lamp will be off.

1.2.1 A 25-watt R-25 plated metallic gooseneck incandescent lamp fixture mounted on a 14-inch flexible arm shall be included. The flexible arm shall be permanently mounted to the middle of the cabinet door. A rotary type switch, used to activate this lamp shall be provided and installed on the rear of the lamp housing. The lamp shall be wired to a door-activated switch mounted near the top of the door. If the toggle switch is ON and the main door is closed the lamp will be off. If the rotary switch is ON and the main door is closed the lamp will be off.

1.2.2 A fluorescent lighting fixture shall be mounted on the inside top of the cabinet near the front edge. The fixture shall be rated to accommodate a F15T8 lamp operated from a normal power factor UL or ETL listed ballast. The fluorescent lighting fixture shall be rapid start type and cold weather rated. The lamp shall be wired to a door-activated switch mounted near the top of the door. If the main door is closed the lamp will be off.

1.3 A rigid slide-out document tray shall be mounted below the bottom shelf. The tray shall be of sufficient size and strength to hold a complete set of cabinet wiring drawings, intersection diagrams, equipment and programming manuals for all equipment and modules applicable to each cabinet. The tray shall operate by sliding out, then opening a hinged cover to remove documents. After removing the documents and closing the cover, the tray shall serve as a suitable resting place for documents or a laptop computer. See diagram concerning the design and construction of this tray. As a reference, use Hennesy Products Inc. Part No. 541.

1.4 Three- (3) sets of complete and accurate cabinet wiring drawings shall be supplied with each cabinet.

1.5 One (1) set of manuals for the Controller Unit, Malfunction Management Unit, Power Supply, Detector Rack, Vehicle Detector Amplifier modules shall be supplied with each cabinet.

1.6 Ten complete sets of schematics, logic drawings, and assembly drawings for each type of electronic unit supplied i.e. Controller Unit, MMU, Power Supply, Load Switches, and Flashers. This documentation shall be provided prior to the delivery of any equipment and shall be a one-time shipment.

1.7 Two complete copies of component, hardware, and manufacturer indices of every item, unit, assemble and component within a cabinet, shall be included as part of these specifications. A complete listing of replacement parts and cost shall be included.

2. 0 VEHICLE DETECTION

2.1. A vehicle detector amplifier rack(s) shall be provided in each cabinet. Detector racks shall be available in two configurations.

3.0 CABINET AUXILIARY SWITCH PANEL AND POLICE PANEL

3.1 An auxiliary switch panel shall be mounted on the inside of the main door. The auxiliary switch panel shall provide as a minimum the following:

AUTO/FLASH SWITCH. When in the FLASH position, power shall be maintained to the controller and the intersection shall be placed in flash. The controller shall not be stop timed when in flash. When the switch is moved from FLASH position to the AUTO position, an external start signal shall be applied to the controller. This external start signal will force the controller to initiate the start up sequence when exiting flash.

STOP TIME ON/OFF SWITCH. STOP TIME ON position, when applied, the controller shall be stop timed in the current interval.

CONTROL EQUIPMENT POWER ON/OFF SWITCH. This switch shall control the Controller Unit, Malfunction Management Unit and Power Supply AC power. When in the ON position the AC power shall be applied.

LAU POWER ON/OFF SWITCH. This switch shall control the AC power to Montgomery County's LAU panel terminal #12.

Two (2) spare switch positions holes shall be provided and plugged for future use.

3.2 The police door switch panel shall contain the following:

AUTO/FLASH SWITCH. When in the FLASH position, power shall be maintained to the controller and stop time shall be applied. The intersection shall be placed in flash. When the switch is moved from FLASH position to the AUTO position, an external start signal shall be applied to the controller. This will force the controller to initiate the start up sequence when exiting flash.

SIGNALS ON/OFF SWITCH. When in the SIGNALS OFF position, power shall be removed from all signal heads in the intersection. The MMU shall not conflict or require reset.

AUTO/MANUAL SWITCH. Cabinet wiring shall include provisions for an AUTO/MANUAL toggle switch and a six (6') foot hand cord. A legend, knockout for the toggle switch and terminals for a hand cord shall be provided. All knockouts shall be plugged. The switch shall be in the top position in the AUTO mode. The AUTO/MANUAL switch and hand cord shall not be provided unless it is called for in the special provisions of this specification.

3.3 All toggle type switches shall be heavy duty and rated 15 amps, at a minimum. Single or double-pole switches may be provided, as required.

3.4 Any exposed terminals or switch solder points shall be covered with a non-flexible shield to prevent accidental contact.

3.5 All switch functions shall be permanently and clearly labeled.

3.6 All wire routed to the police panel and auxiliary panel shall be adequately protected against damage from repetitive opening and closing of the main door. No modular connectors will be allowed in the cabinet except for the detector panel interface. All other cabinet wiring shall be "hard wired" point to point.

4.0 CONTROLLER TELEMETRY INTERFACE PANEL

4.1 A telemetry interface harness and panel shall be supplied with each cabinet.

4.2 The harness shall be a minimum of 6 feet long and shall consist of two twisted shielded pairs, 22 AWG wire with drain wire in an overall jacket, terminated to a 9-pin "D" type connector at one end. The pin out of the 9-pin connector shall be in exact accordance with the NEMA TS 2 Standard. The opposite end of the harness shall be terminated on a 10-position EDCO PCB-1B or exact equal lightning protection socket base.

4.3 All terminal block designations and peripheral board-mounted components shall be labeled as to their number and function and shall correspond to the cabinet wiring diagrams.

4.4 The following signals shall be accessible from the telemetry interface panel:

Local controller command lines 1 & 2.

Local controller read-back lines 1 & 2.

Master controller command lines 1 & 2.

Master controller read-back lines 1 & 2.

Earth grounds.

4.5 A socket mounted communication line transient protection device shall be supplied with the telemetry interface panel. The device shall be an EDCO model PC642C-008D or exact approved equivalent. The transient protection device shall be wired in series with the telemetry communication circuit.

4.6 Communication line impedance shall be matched to the transmitter output impedance to minimize noise on the communication lines. The panel shall allow connection of a 620 ohm resistor across the command and read-back lines, where necessary.

5.0 PREEMPT AND COORDINATION INTERFACE PANEL

5.1 All cabinets with a Type 2 Main Panel shall have a Preempt and Coordination panel mounted on an inside cabinet wall. This panel shall have a harness and connector that will mate with a connector on the Control Unit and will access the following minimum input/output functions. This is also known as the "D" Connector, Panel and Harness Assembly.

6.0 AUXILIARY DEVICES

6.1 LOAD SWITCHES

6.1.1 Load switches shall be solid state and shall conform to the requirements of Section 6.2 of the NEMA TS 2 Standard or as specified.

6.1.2 Signal load switches shall have a minimum load current rating of 10 amperes at 120 VAC for incandescent lamp load.

6.1.3 The front of the load switch shall embody a minimum of six LED indicators. Three indicators to show the input to the load switch and three indicators to show the output of the load switch.

6.1.4 Load switches shall be dedicated per phase. The use of load switches for other partial phases is not acceptable.

6.1.5 The full supplement of load switches shall be supplied with each cabinet to allow for maximum phase utilization for which the cabinet is designed.

6.2 Flashers

6.2.1 The flasher shall be solid state design and shall conform to the requirements of section 6.3 of the NEMA TS 2 Standard.

6.2.2 Flashing of field circuits for the purpose of intersection flash shall be accomplished by a separate flasher.

6.2.3 The flasher shall be rated at 15 amperes, double pole with a nominal flash rate of 60 FPM.

6.3.1 All flash transfer relays shall meet the requirements of Section 6.4 of the NEMA TS 2 Standard or as specified. Contacts shall be capable of making, breaking, with a contact current rating of twenty (20) amperes.

6.3.2 The coil of the flash transfer relay must be de-energized for flash operation.

6.3.3 The full complement of flash transfer relays shall be supplied with each cabinet to allow for maximum phase utilization for which the cabinet is designed.

6.4.1 Each cabinet assembly shall be supplied with one Malfunction Management Unit (MMU) as defined by the requirements of Section 4 of the NEMA TS 2-1992 Standard.

6.4.2 Malfunction Management Units shall be a Type 16.

6.5.1 All Bus Interface Units (BIU's) shall meet the requirements of Section 8 of the NEMA TS 2-1992 Standard.

6.5.2 The full complement of Bus Interface Units shall be supplied with each cabinet to allow for maximum phase and function utilization for which the cabinet is designed.

6.5.3 Each Bus Interface Unit shall include power on, transmit and valid data indicators. All indicators shall be LED’s.

6.6.1 The cabinet power supply shall meet the requirements of Section 5.3.5 of the NEMA TS 2 Standard.

6.6.2 The cabinet power supply shall provide LED indicators for the line frequency, 12 VDC, 12 VAC, and 24 VDC outputs.

6.6.3 The cabinet power supply shall provide (on the front panel) jack plugs for access to the +24 VDC for test purposes.

6.6.4 One (1) power supply shall be supplied with each cabinet assembly.

6.7.1 All detector racks shall contain a full complement of four (4) channel detectors detector amplifier that are compatible with conventional loops as well as 3M Microloop probes. These amplifiers shall be 3M C424T Loop Detectors. Substitutes shall not be accepted.

7.1 LAU PANELand RELAY PACKAGE

7.1.1 Montgomery County shall supply the LAU Panel that will be installed into each cabinet. The LAU Panel shall be wired in accordance with the inputs and outputs listed below. The LAU Panel shall be mounted on the inside left side wall of the cabinet.

7.1.2 A Relay Package shall be mounted immediately below the LAU Panel. A fuse block shall be mounted immediately below the Relay Package. It shall be the responsibility of the cabinet manufacturer to supply the Relay Package with fuse block. The Relay Package shall be wired as specified below.

7.1.3 The LAU Panel, Relay Package and Fuse Block may all be mounted on a single panel to facilitate their installation.

7.1.3.1 The size of the LAU is 6 ½ " Wide X 7 ½" High X 11" Deep.

7.1.3.2 The size of the LAU Panel is 7 5/16" Wide X 9 5/8 " Long. The LAU Panel is mounted on four 0ne inch long standoffs located at each corner of the panel.

7.1.4 The Lau Panel terminal numbers, function, and voltages are listed below.

• 5 Sample Detector #4--Input Logic Common
• 6 Sample Detector #5--Input Logic Common
• 7 Sample Detector #6--Input Logic Common
• 8 Sample Detector #7--Input Logic Common
• 9 Sample Detector #8--Input Logic Common
• 10 Sample Detector #9--Input Logic Common
• 11 Sample Detector #10-Input Logic Common
• 12 AC+ from LAU power switch 120V AC+
• 13 AC- from Isolation Transformer 120V AC- (AC Neutral Line)
• 14 Earth Ground (Chassis Ground) (0) AC Voltage
• 20 Sample Detector #1--Input Logic Common
• 21 Sample Detector #2--Input Logic Common
• 22 Sample Detector #3--Input Logic Common
• 24 +24VDC Controller Logic +24VDC
• 26 Preemptor #1 Active--Input Logic Common
• 27 Phase Check--Input Logic Common
• 28 Flash Input--Input 120V AC+
• 29 Phase #1 Green--Input 120V AC+
• 30 Phase #2 Green--Input 120V AC+
• 31 Phase #3 Green--Input 120V AC+
• 32 Phase #4 Green--Input 120V AC+
• 33 Phase #5 Green--Input 120V AC+
• 34 Phase #6 Green--Input 120V AC+
• 35 Phase #7 Green--Input 120V AC+
• 36 Phase #8 Green--Input 120V AC+
• 37 Detector Phase #1--Input Logic Common
• 38 Detector Phase #2--Input Logic Common
• 40 Detector Phase #3--Input Logic Common
• 41 Detector Phase #4--Input Logic Common
• 42 Detector Phase #5--Input Logic Common
• 43 Detector Phase #6--Input Logic Common
• 45 Detector Phase #7--Input Logic Common
• 46 Detector Phase #8--Input Logic Common
• 47 Logic Common (Logic Ground) Logic Common
• 55 Flash Request--Output 120V AC+
• 56 Inhibit Max--Output 120V AC+
• 58 Special Function #1--Output 120V AC+
• 59 Emergency Flash--Output 120V AC+
• 60 Stop Time--Output 120V AC+
• 62 Call Non-Act II--Output Logic Common
• 63 Hold Phases--Output Logic Common
• 66 Force Off Ring #1--Output Logic Common
• 67 Force Off Ring #2--Output Logic Common

Special Note: There shall be a minimum service loop of 1 ½" at all Lau Panel connections. All jumpers installed on the Lau Panel shall be at least 3" long.
 

• 1. Lau Terminals: 1,2,3,4,15,16,17,18,19,25,48,49,50,51,52,53,54,57,61,64,65,68,69,70,71,72 shall not be wired.
• 2. Lau Terminals 5-11 and 20-22 shall be wired to ten (10) separate I/O terminals to facilitate programmability of these vehicle sampling inputs through the controller from any vehicle channel input.
• 3. Lau Terminal 23 shall be connected to terminal 13.
• 4. Lau Terminal 26 shall be wired to a programmable I/O terminal for preemption #1 active status of the controller. Six (6) terminals shall be provided for the six preemption inputs. Six preemptor active output status terminals shall be included in the I/O terminals.
• 5. Lau Terminal 27 shall be wired to Phase Check of phase #1. Eight (8) separate I/O terminals shall be provided for phases 1 through 8 Phase Check. Phase check terminals for phases 1 through 8 shall be connected together using individual 3" (inch) long jumpers.
• 6. Lau Terminal 28 shall be wired to AC+ signal bus and shall have 120 VAC power as long as the intersection is running normally. If a flash condition exists, either MUTCD flash, conflict flash, police panel or auxiliary flash, AC power to terminal 28 shall be removed.
• 7. Lau Terminals 29-37 shall be wired to 120 VAC Green outputs for phases 1 through 8.
• 8. Lau Terminals 37-46 shall be wired to eight (8) separate I/O terminals to facilitate programmability of these vehicle detection inputs through the controller from any detector channel input for phases 1 through 8.
• 9. Lau terminal 39 shall be connected to terminal 44.
• 10. Lau Terminal 55 shall be wired to relay CR3 terminal #7 of the relay package denoted on the diagram.
• 11. Lau Terminal 56 shall be wired to relay CR4 terminal #7 of the relay package denoted on the diagram.
• 12. Lau Terminal 58 shall be wired to relay CR5 terminal #7 of the relay package denoted on the diagram.
• 13. Lau Terminal 59 shall be wired to relay CR6 terminal #7 of the relay package denoted on the diagram.
• 14. Lau Terminal 60 shall be wired to relay CR7 terminal #7 of the relay package denoted on the diagram.
• 15. Lau Terminal 62 shall be wired to Call To Non-actuation Mode II. I/O terminals shall be provided for Call to Non-actuation Mode I and one terminal for Call to Non-actuation Mode II. Terminals shall be provided for Ring I Max II and Ring II Max II. A jumper shall be installed from CAN II to Ring I Max II and to Ring II Max II.
• 16. Lau Terminal 63 shall be wired to Hold Phases 2 and 6. Eight (8) I/O terminals shall be provided for Hold Phases 1 through 8.
• 17. Lau Terminal 66 shall be wired to Force Off Ring I. One (1) I/O terminal shall be provided for Force Off Ring I.
• 18. Lau Terminal 67 shall be wired to Force Off Ring II. One (1) I/O terminal shall be provided for Force Off Ring II.
• 19. I/O Terminals shall be provided for Ring I and Ring II Ped Recycle. Ring I and Ring II Ped recycle shall be wired to Logic Common.

7.2 RELAY PACKAGE

7.2.1 Relay Packages provided in all cabinets shall meet the provisions as outlined in this section as well as section

7.1.2. above.

7.2.2 All relays shall be Potter & Brumfield Type KRPA-N11AG-120V with indicator lamp wired in parallel with the coil.

7.2.3 All relay sockets shall be Potter & Brumfield Type 27E891-din rail mount, with screw terminals.

7.2.4 All relay sockets shall be mounted on a single Din Rail with appropriate mounting hardware. A minimum of eight (8) sockets and relays shall be provided in each cabinet.

7.2.5 All relays shall be clearly label, and mounted as follows from left to right:

CR1 PRE-EMPT 1

CR2 PRE-EMPT 2

CR3 REMOTE FLASH

CR4 INHIBIT MAX

CR5 SPECIAL FUNCTION

CR6 EMERGENCY FLASH

CR7 STOP TIMING

CR8 SPARE

7.2.6 Immediately below the Relay Package shall be mounted a six (6) position (minimum) fuse block capable of accepting appropriate 120 volt buss fuses from 1/4 amp to 20 amperes. A five (5) ampere slow-blow fuses shall be provided in each fuse holder. A clear plastic cover shall be provided over the fuse block to protect personnel from electrical shock. The Fuse block shall be numbered from left to right starting with FU1 through FU6. AC+ shall be wired to the top of fuse FU1 and to no others. The source of AC+ shall be from the AC+ signal bus and shall have 120 VAC power as long as the intersection is in color operation. If a flash condition exists, either MUTCD flash, conflict flash, police panel or auxiliary flash AC+ power to FU 1 shall be removed. Each fuse block shall use screw terminals for wire termination, soldered terminals are not acceptable.

7.2.7. All relays shall be wired as per this explanation and diagram provided.

1. PRE-EMPT 1
• CR1 terminal #1 shall be wired to Logic Common.
• CR1 terminal #2 shall be wired to AC- neutral.
• CR1 terminal #3 shall be wired to I/O Pre-empt input #1.
• CR1 terminal #7 shall be wired to the top of fuse FU2.
 
2. PRE-EMPT 2
• CR2 terminal #1 shall be wired to Logic Common.
• CR2 terminal #2 shall be wired to AC- neutral.
• CR2 terminal #3 shall be wired to I/O Pre-empt input #2.
• CR2 terminal #7 shall be wired to the top of fuse FU4.
  3. REMOTE FLASH
• CR3 terminal #1 shall be wired to Logic Common.
• CR3 terminal #2 shall be wired to AC- neutral.
• CR3 terminal #3 shall be wired to I/O Test Input B which shall initiate Automatic flash per NEMA T 2-1992 section 3.9.1.2(1).
• CR3 terminal #7 shall be wired to Lau terminal #55.
 
4. INHIBIT MAX.
• CR4 terminal #1 shall be wired to Lau terminal #62.
• CR4 terminal #2 shall be wired to AC- neutral.
• CR4 terminal #3 shall be wired to I/O terminals
• Inhibit Max Ring I and Inhibit Max Ring II.
• CR4 terminal #7 shall be wired to Lau terminal #56.
 
5. SPECIAL FUNCTION
• CR5 terminal #2 shall be wired to AC- neutral.
• CR5 terminal #7 shall be wired to Lau terminal #58.
  
  

  6. EMERGENCY FLASH
• CR6 terminal #1 shall be wired to Logic Common.
• CR6 terminal #2 shall be wired to AC- neutral.
• CR6 terminal #3 shall be wired to I/O terminals
• Stop Time Ring I and Stop Time Ring II.
• CR6 terminal #5 shall be wired to MMU Connector A Pin W. (output relay 1 common).
• CR6 terminal #7 shall be wired to Lau terminal #59.
• CR6 terminal #8 shall be wired to the load side of the Line Filter or terminal connected to Line Filter.
• If this relay is removed the intersection shall immediately go to flash.
• Upon activation of this relay the intersection shall immediately go to flash.
• An external restart shall be applied to the controller when the intersection is returned to color operation.

7. STOP TIME
• CR7 terminal #1 shall be wired to Logic Common.
• CR7 terminal #2 shall be wired to AC- neutral.
• CR7 terminal #3 shall be wired to I/O terminals
• Stop Time Ring I and Stop Time Ring II.
• CR7 terminal #7 shall be wired to Lau terminal #60.

8. SPARE
• CR8 This relay and socket shall be provided in all relay packages. No wiring shall be required for this relay.
• 7.2.8 All relays included in the relay packages shall be provided with individual suppression.

1.0 MODULES, TESTERS, SPECIAL EQUIPMENT & SOFTWARE

1.1 Five (5) Controller Testers shall be supplied as part of this specification. The controller tester shall be "portable", commonly referred to as a "suitcase" size tester. It shall be powered by a 120VAC line cord. It shall be capable of testing and simulating all inputs and outputs of the Controller Unit described earlier in this specification. As a minimum, all inputs and outputs of connectors "A","B", "C", shall be capable of being tested or simulated.

1.2 Controller, BIU, Cabinet I/O Programmability software shall be restricted to one (1) copy only under the direction of Keith Lord, Supervisor, Signal Shop. It shall be the responsibility of the vendor to provide specific training for I/O programming to Keith Lord and designated personnel and to ensure these persons are capable in its use. It shall be the responsibility of Montgomery County Signal Shop Supervisor to safeguard the use of this software. At no time shall any person be capable of I/O programming without the correct passwords and software to do so.

1.3 Three (3) Athens Technical Specialists, Inc. Automated Loop System Analyzers shall be supplied as part of these specifications.

1.4 Four (4) Automatic Load Switch Testers shall be supplied as part of these specifications. The tester shall automatically cycle the outputs under a Ten (10) amp load. Cycle time shall be adjustable from five (5) seconds to five (5) minutes in thirty (30) second increments. It shall also be possible to manually turn on or off any output.

1.0 TESTING

1.1 Each Controller, MMU, Power Supply, Detector Rack, Detector Modules, BIU's and cabinet assembly shall be tested as a complete entity under signal load for a minimum of 24 hours.

1.2 Each assembly shall be delivered with a signed document detailing the cabinet final tests performed.

1.3 The cabinet shall be assembled and tested by the controller manufacturer or authorized local distributor to ensure proper component integration and operation.

1.4 Montgomery County reserves the right to reject an entire shipment of cabinets, units, or devices covered by this Specification and purchase order if ten (10) percent or more prove to be defective with in a thirty (30) day period after shipment, or fail any performance test.

2.0 WARRANTY

2.1 Electronic components shall be warranted by the manufacturer against mechanical and electrical defects for a period of 2 years. The cabinet assembly and all of it’s component parts shall be warranted for a period of one year. The manufacturer's warranty shall be supplied in writing with each cabinet, and unit within the cabinet. Second party extended warranties is not acceptable.

2.2 Any defects in the design, workmanship, or material shall be fully corrected by the supplier during the warranty period at no cost to the owner. All costs of labor, parts and transportation to and from vender shall be borne by the vender for the duration of the warranty period.

2.3 The vendor shall be fully responsible for extending manufacturer's warranties on the cabinet and all equipment contained therein. The vendor shall be responsible for obtaining service on all warranted equipment.

2.4 The vendor shall provide all revisions to any equipment furnished under these specifications, at no cost to Montgomery County.

1.0 TRAINING

1.1 The successful bidder shall provide two (2) sessions of twenty (20) classroom hours for training in the maintenance of all furnished devices.

1.2 The sessions shall be provided within twenty (20) days after receipt of ten (10) percent of the first order of cabinets.

1.3 A maximum of 25 students shall be trained.

1.4 Operational and maintenance training for all furnished equipment shall be provided to designated personnel through means of practical demonstrations, seminars, operator and maintenance manuals, and other related technical teaching procedures.

1.5 The successful bidder shall furnish all necessary labor, programming, audio-visual materials, training, facilities and engineering services to demonstrate all possible means of programming and other features. The sessions shall demonstrate fully operational equipment.

1.6 Training shall include, but not be limited to the following.

• Hands-on operation of all furnished equipment.
• Instructions of trouble-shooting or problem identification procedures.
• Instruction on required preventive maintenance procedures.

1.6.1 The training shall achieve a training level to effectively diagnose an equipment failure.

1.6.2 Separate video (VHS) training tapes shall be provided detailing all functional and operational aspects of the furnished equipment. Tapes shall be professional audio and video quality, edited to explain the following.

• Basic unit operation and maintenance.
• All possible means of programming and other features.
• Servicing procedure to effectively diagnose an equipment failure in the field.


END OF SECTION EIGHT

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1.0 SHIPMENT

1.1 The successful bidder shall DELIVER and UNLOAD all shipments onto a loading dock.

1.2 The successful bidder shall notify Mr. Keith Lord or Mr. Tom Shifflett at (301) 279-1291 or (301) 279-1971 at least seven (7) calendar days in advance of delivery and unloading of any shipment to verify the delivery date and location. No more than two (2) trailer loads shall be accepted per day and then only on County workdays, between the hours of 7:00 a.m. and 1:00 p.m.

1.3 Shipments shall be delivered to Montgomery County, Signal Unit, Building "C", 1283 Seven Locks Road, Rockville, Maryland, 20854 unless otherwise specified.

1.4 All cabinets shall be shipped mounted on skids constructed to fit the cabinet to be transported. Skids shall be fabricated from new materials only. The use of recycled materials in the manufacturing of the skids is unacceptable. The bottom of the cabinets shall be sealed when attached to the skid and a 3.5 inches clearance shall be provided between the bottom of the skid and the floor. Additionally the cabinet shall be banded to the skid from front to back and side to side.

1.5 All cabinets shall be provided with their full complement of equipment inside each cabinet. All equipment shall be boxed and protected for shipment. All documentation shall be provided in each cabinet as outlined in these specifications. If size constraints prohibit the shipment of equipment inside the cabinet, the following alternative may be used. Each cabinet shall be labeled with a box number. The same box number shall be applied to each box of equipment or documentation belonging to that cabinet.

1.6 Serial numbers, model numbers and the manufacturer's name and production date shall be clearly legible and permanently placed on all cabinets, Controller Units, assemblies, MMU's, Power Supplies, BIU's, Detector racks, all equipment and modules supplied, and circuit boards.

1.7 All other equipment, assemblies and documentation shall be shipped separately and in their own containers or boxes. No unlike unit(s) or item(s) shall be shipped together in a single container.

1. 0 DESCRIPTION AND QUANTITIES NEEDED PER SPECIFICATION
 
 

SPECIAL INSTRUCTIONS OR INFORMATION

For purposes of clarification, instruction or information regarding these Specifications, the person or persons to contact shall be: