871 733- 3 Construction Requirements: Construction shall be such that all conductors are concealed within assemblies. Cable guides shall be used to support and protect conductors entering through poles. All threads shall be coated with rust - preventive paint during assembly. Each vehicle, pedestrian signal, or flasher assembly shall be mounted at the location and in the manner shown on the project plans. When signal faces are mounted on a mast arm, the plumbizer when specified shall be placed on the mast arm, and a 3/8- inch by 4 -inch bolt shall be used to fasten both together. Materials removed and not designated to be salvaged or incorporated into the work shall become the property of the contractor. All traffic signal heads not in use shall be covered with burlap and shall be unmistakably out of service when observed by an approaching driver. Plastic coverings shall not be allowed. 733- 4 Method of Measurement: Traffic signal faces, pedestrian signal faces, traffic signal mounting assemblies and flashing beacons will be measured as a unit for each type of signal face, mounting assembly or flashing beacon furnished and installed or modified. 733- 5 Basis of Payment: The accepted quantities of traffic signal faces, pedestrian signal faces, traffic signal mounting assemblies and flashing beacons, measured as provided above, will be paid for at the contract unit price each, for the type signal face, mounting assembly or flashing beacon designated in the bidding schedule, complete in place, which price shall be full compensation for the work described and specified herein and on the plans, including visors, backplates, lamps and all hardware necessary to provide a complete, functional, traffic signal installation. No direct payment will be made for assembly of Department -furnished items, the cost being considered as included in the contract price bid for the item in place. 734- 1 Description: The work under this section shall consist of furnishing and installing traffic controller assemblies at the locations shown on the project plans TABLE OF CONTENTS INDEX SECTION 734 872 and in accordance with the details shown on the plans and the requirements of these specifications. A traffic controller assembly shall consist of a complete assemblage of electrical equipment and components for controlling the operation and timing of traffic control signals. 734- 2 Materials: The controller assembly shall include the controller unit, all necessary auxiliary equipment, the controller cabinet, concrete foundation, conduit, elbows, anchor bolts and clearance pad. The auxiliary equipment shall include all appurtenances such as flasher controls, loop detector amplifiers, power assemblies, signal load switches, conflict monitors, pre- emptors, controllers, coordinators, time switches, external logic, lighting controls, cabinet wiring and accessories as indicated on the plans or in the Special Provisions. The entire surface area of each circuit board shall be sealed to protect against moisture. The following auxiliary equipment shall be furnished with all wired traffic controller assemblies when required: Controller ; Power Panel ; Signal Load Switches; Signal Conflict Monitor ; Detectors; Controller Flasher Assembly; Flash Switches; Surge Protector ; Radio Interference Suppresser ; Cabinet Ventilation Fan; Terminal Tie Points; and Field Terminals 734- 2.01 General Requirements: The traffic controller assembly equipment shall conform to the requirements of the current edition of NEMA Publication TS -1.
The contractor's material proposal shall include complete technical information, shop drawings, photographs, graphs, circuit diagrams, instruction manuals, and any other necessary documents to fully describe the proposed traffic controller assembly items. TABLE OF CONTENTS INDEX 873 At t he time of delivery, the contractor shall furnish three sets of instruction books and an itemized price list for each type of equipment, their sub- assemblies, and their replacement parts. The instruction books shall include the following information:
information for the entire assembly and for all components capable of being adjusted;
The instruction manuals shall include itemized parts lists. The itemized parts list shall include the manufacturer's name and part number for all components (such as transistors, integrated circuits, diodes, switches, resistors, capacitors, relays, etc.) used in each circuit module. The list shall also include cross- references to parts numbers of other manufacturers who make the same replacement part.
Each controller unit and all of its auxiliary equipment shall be warranted by the supplier against all defects in materials and workmanship in accordance with Subsection 106.13 of the specifications with the additional requirements as specified hereinafter. The warranty for the controller unit and its auxiliary equipment shall provide that in the event of malfunction during the warranty period, a like controller unit, module, or auxiliary equipment shall be furnished, within three working days, for use while the warranted unit is being repaired. The isolation of any malfunction and the repair and/or replacement of any device within the warranty period shall be the responsibility of the supplier. The Department reserves the right to reject equipment of a specific model type in which the Department has determined that its past field performance has been unsatisfactory. The Department's rejection of an item shall be final. TABLE OF CONTENTS INDEX 874
A Certificate of Compliance conforming to the requirements of Subsection 106.05 of the specifications shall be submitted for each traffic controller assembly. The Department reserves the right to require Certificates of Compliance for each controller assembly component. The Department reserves the right to perform tests on any equipment supplied by the contractor in the Department's testing facilities.
The Department will only accept equipment furnished by manufacturers or vendors with proof of liability insurance for controller units, conflict monitors, load switches, flashers, and flash relays, and which have been pre-approved by the Department. All traffic signal controller units shall be tested by the Department's testing procedures and be pre- approved by the Department. Pre- approved traffic signal controller units will be listed in the Special Provisions. Any controller unit and specified component not listed in the Special Provisions will not be accepted. The Department reserves the right to re- test any pre- approved equipment supplied by the contractor in the Department's testing facilities. The following includes all traffic signal controller units that have been tested and preapproved as specified by the Department as per these specifications. The following controller equipment has been pre- approved by the Department as of January 2014:
System Applications (TS2, Type 2 - Downward Compatible TS1):
EPAC M53 with the following special programs: MPS -SI Computer Supervised Unit MPS -P Pre-emption MPS -T-C Time Base and Traffic - Actuated Coordination MPS -M Arterial Master Controller
TABLE OF CONTENTS INDEX 875
ASC/3 with the following special programs: ADOT Basic Program Configuration MPS -SI Computer Supervised Unit MPS -P Pre-emption MPS -T-C Time Base and Traffic - Actuated Coordination MPS -M Arterial Master Controller
ASC/2 -1000 with the following special programs: MPS -SI Computer Supervised Unit MPS -P Pre-emption MPS -T-C Time Base and Traffic - Actuated Coordination MPS -M Arterial Master Controller
Colbalt with the following special programs: ADOT Basic Program Configuration MPS -SI Computer Supervised Unit MPS -P Pre-emption MPS -T-C Time Base and Traffic - Actuated Coordination MPS -M Arterial Master Controller
NEMA Controller X series with the following special programs: MPS -P Pre-emption MPS -T-C Time Base and Traffic - Actuated Coordination MPS -M Arterial Master Controller
ATC eX with the following special programs: MPS -SI Computer Supervised Unit MPS -P Pre-emption MPS -T-C Time Base and Traffic - Actuated Coordination
TABLE OF CONTENTS INDEX 876
3 Channel LT-213 6 Channel LT-216 12 Channel LT-222
3 Channel NCMU -3 6 Channel NCMU -6 12 Channel NCMU -12
3 Channel NSM -3L 6 Channel NSM -6L 12 Channel NSM -12L 16 Channel MMU -16LE 16 Channel MMU2 -16LE
3 Channel NM(NP) -3L 6 Channel NM(NP) -6L 12 Channel NM(NP) -12L 18 Channel LCD -18P
3 Channel Model 300 6 Channel Model 600 12 Channel Model 1200
3 Channel LSM -3 6 Channel LSM -6 12 Channel LNM -12E 12 Channel LMN -12E
TABLE OF CONTENTS INDEX 877
Software Protocol Econolite ASC/2 and ASC/2S NTCIP Econolite ASC/3 NTCIP Econolite ASC/2 AB3418 Peek 3000/3000E ATC -1000 NTCIP Eagle M50/M52 NTCIP
Software Protocol US Traffic ATC NTCIP Econolite 2070 ASC/2 and ASC/3 NTCIP Eagle SEPAC NTCIP Siemens NextPhase NTCIP Fourth Dimension D4 NTCIP NWS Voyage AB3418E Intelight NTCIP McCain Omni eX (basic status) NTCIP
A completely wired controller assembly with wiring diagrams and instruction books shall be delivered for inspection and testing unless otherwise specified. The equipment shall be delivered to: Arizona Department of Transportation Traffic Operations Services Traffic Signal Shop 2104 South 22nd Avenue Phoenix, Arizona 85009 It shall be the responsibility of the contractor to correct or replace any equipment t hat fails Department testing. Such corrections or replacements shall be as directed by the Engineer.
The traffic controller assembly shop test procedure shall be as follows:
TABLE OF CONTENTS INDEX 878
of 72 hours under on- line conditions;
Department at the discretion of the Engineer ;
working days to correct the failure. Procedures (3) and
passes the tests. The Engineer may require the replacement of any component after that component's second failure under test ;
contractor shall pick up the control cabinet and equipment, haul them to the job site, and install them as specified. After the contractor has mounted the control cabinet on the cabinet foundation, Department personnel will connect all the field wiring inside the control cabinet and test the signal circuits; and
Electrical Inspection Unit at 2104 South 22nd Avenue, Phoenix, Arizona 85009, (602) 712- 7312. No activations outside the Phoenix metropolitan area shall be scheduled either on Monday or Friday. The Contractor shall be responsible to ensure that all the required work has been completed and that the traffic signals are ready to be activated on the pre- arranged date. If the Department determines that the traffic signal work is not complete and cannot be activated, then the contractor shall be responsible for costs incurred by the Department (personnel, equipment, lodging, per diem, salary etc.). 734- 2.02 Traffic Signal Controllers: A traffic signal controller shall consist of an electronic device dedi cated to the selection and timing of traffic movements. Each controller shall provide all the features, functions and phasing operations as indicated on the plans and the Special Provisions.
The solid state digital controllers shall utilize modular construction, solid state circuitry, and digital timing techniques. Integrated or discrete semiconductor devices shall be used exclusively. Controller logic shall have high noise immunity. TABLE OF CONTENTS INDEX 879 Solid state components shall be standard production types and shall be readily available. Components shall be properly rated with respect to heat dissipating capacity and rated voltage. The minimum rated life of all components shall be 10 years under 24- hour -a-day operation. Components shall be clearly identifiable by markings on circuit boards or parts numbers on pictorial diagrams. The digital timing techniques and repeatability shall be accordance with:
The controller shall contain plug -connected module boards. The solid state components shall be mounted on printed circuit module boards. The module boards from the controller shall be easily removed without the use of special tools and shall be designed to permit replacement of all components without damage to the board or its circuits. Each individual printed circuit board shall be identified by a serial number or parts number clearly stamped or etched on the board. The module circuit boards shall be arranged by functional groupings. Each module board by functional design shall be electrically and mechanically interchangeable with other controllers of the same model, controller series, or frame type. The module boards shall be fabricated from epoxy glass laminate NEMA grade G -10 or G -11, with a minimum weight of 2 ounces of copper per square foot. The copper track shall have adequate cross- section to carry the designed current capacity. All contact surfaces shall be non- corrosive construction. The entire surface area of each circuit board shall be sealed to protect against moisture. Phase timing modules which time more than one phase shall be programmable to permit the selective disabling of unused phases. Modules that have a 120- volt AC input shall be properly fused within the controller. The interfaces and the power supply for the controller shall be designed to accommodate the maximum module configuration possible for the controller such that no additional future modifications are required. Interchangeable connectors (except data buss type) shall be keyed to prevent their insertion into the wrong receptacle of the controller. TABLE OF CONTENTS INDEX 880 The controller's housing shall be an integral frame assembly constructed of non- ferrous metals. The housing shall conform to all NEMA requirements.
All volatile memory in controllers, time switches, and time base coordinators shall utilize a battery back- up supply to maintain memory as follows:
is removed from controller ;
battery shall be rated to maintain memory for not less than five years in continuous use and include a battery condition indicator ; and
shall be the type that can be operated, stored, or charged in any position and be capable of being recharged not less than 1,000 times. The rechargeable batteries shall have an automatic battery charger with a battery discharge indicator and shall operate within the NEMA environment standards.
Indicators shall be the sub- miniature type and may be either incandescent lamps or solid state. Incandescent lamps shall be replaceable from the front of the panel. All programming pins shall be the printed circuit receptacle, non-corrosive, turning fork type. The pin contactor shall fit any standard 0.055- inch to 0.73- inch board. The pin shall be rated for 600 volts and 5 amperes.
The DPT controller shall designate a digital pre- timed controller compatible with NEMA standards, these specifications, the Special Provisions, and the plans. The Type DPT controller shall be designated with six- position alphanumeric code. The two numbers in the code shall have the following meanings: DPT18_ - Capacit y of up to 18 signal load circuits TABLE OF CONTENTS INDEX 881 DPT40_ - Capacity of up to 40 signal load circuits The letters in the last position shall have the following meanings: DPT__S - Computer Supervised Unit DPT__P - Programmed for Pre- emption DPT__T - Programmed for Time Base Coordination DPT__H - Hard Wire Intertie When the last position has more than one letter, the controller shall have all the functional features defined by each letter. All the DPT controller units supplied shall be readily programmable for pre-emption and shall include the time base coordination module and programming.
The DPT18 shall meet the following specifications and shall be designed for non- actuated operation of traffic signals having pre- determined cycle lengths, cycle lengths, interval durations, and interval sequences. The controller shall have three independent cycles with three offsets and two splits per cycle. Cycle lengths shall be front panel adjustable with a front panel cycle- in-effect indicator. The cycle display shall show the local elapsed time, inputs, outputs, and timing values. The controller shall have 10 signal intervals and 18 independently controlled on/off signal circuit outputs which may be independently programmed for flashing the signal output in a designated interval. The controller unit for replacement for a type- F electromechanical controller shall be a retrofit back panel 22.5 inches high, 13.0625 inches wide, and 10.3125 deep. The back panel shall house NEMA -type flasher, load switches, and two- channel card rack amplifier. The flasher transfer relays shall be interfaced with a Cinch- Jones type eight -pin socket. The signal load shall be controlled by a 60- ampere tungsten mercury contactor.
Indicators shall include digital read- outs to display all inputs, countdown timing intervals, cycle, split, local master and pre- emption. TABLE OF CONTENTS INDEX 882
Program entries shall be front panel programmable without the use of tools or software.
Pre-emption functions shall be programmable assignments to include entrance times, track clearance (passage and clearance times), minimum duration protection time, and exit. The programming shall also include detection mode, pedestrian indications operation, delay time, and flash operation.
The back panel shall include card- rack mounted NEMA -type vehicle detector for two detector channels. Each channel shall input each actuated vehicle signal phase group.
The actuated signal phase groups shall have pedestrian actuated movements.
The start -up operation and flash operation intervals and timing shall be programmable in the unit.
The control cabinet shall be the type specified on the plans and in the Special Provisions. The control cabinet shall include the following items: cabinet fan, light, convenience outlet, and police panel. The following switches shall be included: main- on/off, controller auto on/controller on- flash/controller off -flash, signal lights on/off, and auto/manual. The following switches shall be mounted inside the police panel: main switch, auto/flash switch, and auto/manual switch, and manual control cord.
The conflict monitor shall be a cable -connected unit, external, shelf mounted, six channel, NEMA -wired to monitor all functions. All the TABLE OF CONTENTS INDEX 883 equipment housed in the control cabinet shall be installed and removed from the front with ease.
The DPT40 shall be designed for non- actuated operation of traffic signals w ith pre- determined cycle lengths, interval durations, and interval sequences. The controller unit shall have a minimum of three independent cycles. Each cycle shall have a minimum timing range of 0-255 seconds and interval timing of 0- 25.5 seconds, in one -second and one- tenth- second increments. Each cycle length shall be front panel adjustable with a front panel cycle- in-effect indicator. A cycle read- out shall show the time of the local cycle that has elapsed. Each cycle shall have three offsets and four splits. The four splits (signal interval plans) shall be selected by either a remote interconnect, time switch, or a local detector actuation. The controller unit shall have 31 signal intervals and 40 independently controlled on/off signal circuit outputs which may be independently programmed for flashing the signal output in a designated interval.
The pre- timed controller unit shall have a manual switch to synchronize itself with an intertie system input, or the controller unit shall be capable of providing a sync- pulse to an intertie system when programmed to be a master controller unit.
The controller unit shall be capable of operating with an existing master controller unit with six of 10 functions. The controller unit inputs from a standard- type pre- timed interconnect shall be as follows: Dial 2 One Input Offset 1 Split 1 * 2 * 3 * 4 * Flash Common AC neutral Note:
*Splits 1, 2, 3, and 4 shall be used with a 10- function intertie system only.
TABLE OF CONTENTS INDEX 884 Dial 1 shall be in effect when neither the Dial 2 nor the Dial 3 lines are energized. A master controller unit with direct control by a computer system shall have NEMA -logic level inputs.
The conflict monitor shall be an external shelf -mounted, 12- channel or larger NEMA cable- connect unit wired to monitor all functions.
An auto- manual control switch and wiring terminals shall be furnished in the controller cabinet assembly for a momentary contact hand held switch. The auto- manual control switch shall be accessible with a standard police type key. The hand- held manual switch shall be weather -proof on a retractable cable. Manual operation of the controller shall provide the same color sequence as was programmed for the automatic operation. The duration of all intervals, except the yellow vehicle interval and the red vehicle clearance interval, shall be controlled by operation of the manual switch. Duration of the yellow interval and red clearance interval shall be the minimum time specified to be programmed in the controller unit.
A guaranteed minimum back- up time for each interval, programmed in accordance with the signal plan non- volatile programmable read- only memory, shall be provided as specified on the plans or in the Special Provisions.
The following functions shall be programmed by the manufacturer into the programmable read only memory in accordance with the signal plan specified on the project plans:
TABLE OF CONTENTS INDEX 885
The following functions shall be programmable from the front panel by the operator in the field: Timing Entry; Cycle Lengths; Offsets; Interval Time; Read- out of cycle, split, and interval; Read- out of Timing in the PROM; and Pre-Emption Interval Timing.
The following function switches shall be provided: Lock/Non- Lock - Recall for each detector Local/Remote selection of cycle, offset, split and plan Sync/Hold for non- interconnected operation The programming of the timing entry, cycle, offsets, selectable functions, and phase timing intervals shall be set by entry switches, programming pins or by keyboard entry. Programming shall include digital solid state read- outs of keyboard programmed functions.
The signal output connectors shall be compatible with the NEMA four - phase controllers. The controller unit shall use the stan dard NEMA connectors A and B per NEMA table 13- 3, four -phase terminations, and the following tables: TABLE OF CONTENTS INDEX 886 CONNECTOR A Pin No. Function Pin No. Function A Reserved f Det. 1 B 24-Volt DC g Det. 5 C Voltage Monitor h Det. 9 D Sig. Ckt. # 3 i - E Sig. Ckt. # 6 j Remote Flash F Sig. Ckt. # 10 k Guar. Interval G Sig. Ckt. # 13 m - H Sig. Ckt. # 12 n Signal Plan 2 (Preempt 1) J Sig. Ckt. # 11 p AC + K Det. 2 q Master Sync (Out) L Det. 6 r Spare M Det. 10 s Sig. Ckt. # 1 N Stop Time t Sig. Ckt. # 4 P Coord. Sync (IN) u - R External Start v - S Manual (Interval Advance) w Overlap Advance T Indicator Lamp Control x Free U AC - y Cycle 2 V Chassis Gnd z Split 4 W Logic Gnd AA Signal Plan 3 (Preempt 2) X Flash Logic (1PPS) BB O'L Mode Y Spare CC Spare Z Sig. Ckt. # 2 DD Sig. Ckt. # 7 a Sig. Ckt. # 5 EE - b Sig. Ckt. # 9 FF Signal Plan c Sig. Ckt. # 8 GG Split 2 d - HH Cycle 3 e Sig. Ckt. # 14
TABLE OF CONTENTS INDEX 887 CONNECTOR B Pin No. Function Pin No. Function A Free Output f Spare B Flash Cont. g Spare C Spare h Det. 12 D Sig. Ckt. # 15 i Det. 11 E Sig. Ckt. # 16 j Cycle 4 (Optional Function) F Sig. Ckt. # 17 k - G Sig. Ckt. # 24 m - H Sig. Ckt. # 26 n - J Sig. Ckt. # 27 p Sig. Ckt. # 30 K - q Sig. Ckt. # 31 L Det. 4 r - M Det. 8 s Sig. Ckt. # 21 N Det. 3 t Spare P Det. 7 u Sig. Ckt. # 40 R Offset 3 v - S Offset 2 w Sig. Ckt. # 38 T - x - U Offset 1 y - V CMU Stop Time z - W Split 3 AA Sig. Ckt. # 29 X - BB Sig. Ckt. # 36 Y Sig. Ckt. # 18 CC Sig. Ckt. # 37 Z Sig. Ckt. # 19 DD Sig. Ckt. # 34 a Sig. Ckt. # 20 EE Sig. Ckt. # 39 b Sig. Ckt. # 22 FF Sig. Ckt. # 32 c Sig. Ckt. # 23 GG Sig. Ckt. # 35 d Sig. Ckt. # 25 HH Sig. Ckt. # 33 e Sig. Ckt. # 28
The following inputs shall be in accordance with NEMA: Stop Timing Shall have the effect of halting the local percent counter. Manual Enable Guaranteed interval inhibit. Interval Advance (Manual) Shall step controller through each programmed interval sequentially. Shall operate on trailing edge of pulse. When asserted with stop timing shall provide manual control of all intervals. Indicator Lamp Control Shall extinguish all front panel indicators. External Start Shall force the controller to the specified starting interval. The normal cycle shall resume immediately upon release of this input. Detectors, Chassis Ground, and Pre -Emption.
The following outputs shall be in accordance with NEMA: TABLE OF CONTENTS INDEX 888 Signal Output Circuits: Interval 1 On Shall be active for the duration of interval 1. Voltage Monitor Shall be active as long as the controller is providing proper operation. + 24 volts DC Logic Common Master Sync Shall be active at all times except during the master sync period. Flash Logic Shall alternate between true -false logic levels at a one pulse per second repetition rate.
When specified, a pre- emption program shall be provided in the controller software. The pre- emption program shall be initiated by a non- locking pre- emption call. The pre- emption mode shall have its own timing, including minimum timing and signal plan.
The controller programs provided by the manufacturer shall be permanently stored in a non- volatile memory such that batteries shall not be required to maintain the minimum interval timing, interval sequences, start -on, offsets, cycle and splits, flash on/off, detectors, signal circuits flash, and pre- emption.
The actuated solid state digital controller shall be designed for the operation of traffic signals with fully actuated or semi -actuated timing of the traffic signals including operation with auxiliary equipment. Each actuated controller shall be furnished with the required number of phases, phase sequence, phase timing features, and all other control functions that are specified herein, on the plans, or in the Special Provisions.
Actuated controllers shall be designated on the plans or Special Provisions with the followi ng designations: The DAN controller shall designate a digital actuated controller conforming to NEMA Standards, these specifications, the Special Provisions, and the plans. The number in the alphanumeric code type shall mean the following: TABLE OF CONTENTS INDEX 889 DAN- 2 Two -phase controller DAN- 4 The controller shall be capable of operating four phases. DAN- 8 The controller shall be capable of operating eight phases.
Each DAN controller unit phase timing or phase module shall include timing periods for each vehicle and pedestrian phase actuated with volume density timing, or non- actuated timing for semi -actuated phase operation. Each phase timing period shall be not less than the minimum required by NEMA.
The DAN controller pre- approval shall be in accordance with current NEMA specifications and these specifications. No additional functions shall be in the DAN controller. Pre- approval tests and evaluations shall be performed by the Department and approved by the Engineer.
Controllers with more than two phases shall be furnished with a NEMA 14-9 overlap program board and driver outputs. The NEMA -type overlaps shall be programmed by the NEMA program board assembly with hard wire jumpers easily accessible inside the controller, or programmed in the controller without the use of tools.
The controller unit frames shall be two- , four -, and eight -phase, not exceeding the NEMA -specified dimensions, except height which shall be 17 inches maximum. Equipment shall be interchangeable in the controller cabinet.
Each phase and associated overlap phases of a single- ring controller shall be sequentially timed as indicated on the plans. Dual -ring controllers shall be sequentially timed per ring and concurrently timed per non- conflicting phase. Dual -ring controllers shall be programmed for the dual entry mode of operation. Dual -ring traffic signal controllers that are PROM programmable shall include three PROMS, one installed PROM, and include two spare phase sequence PROMS as follows: TABLE OF CONTENTS INDEX 890 PROM A - Eight -phase, quad left turn operation. PROM B - Eight -phase, dual left turn ring one operation, sequential ring two operation. PROM C - Eight -phase sequential operation. The two spare PROMS shall be identified and packaged for future use.
Connectors: The controller shall provide all the NEMA input/output functions. The A, B, and C Connectors and their pin assignm ents shall be the same as shown in Table 13- 3 of 1983 NEMA for two- , four -, and eight -phase controller units and their cables. All A and B connectors and cables shall include specified four - and eight -phase functions, for future use. Auxiliary connectors shall not be permitted on Type DAN controllers.
Standard controller functions specified by NEMA, and as specified in these specifications shall be furnished. The controller unit functions shall include NEMA TS -1, Sections 13 and 14. The standard functions shall be the NEMA -specified features on a per phase, per ring, and per unit basis.
Clearance Timing: All controllers shall have a guaranteed minimum clearance timing program and shall be programmed as follows:
The controller shall have the capability to permit exclusive pedestrian phase when required. TABLE OF CONTENTS INDEX 891
All controllers with a backup timing PROM capability shall be programmed for the type of phase movement for the minimum times as follows: Any Vehicle and Pedestrian Phase Movement (Non -Actuated) Interval Time in Seconds Minimum Green 25 Walk (Solid) 7 Ped Clearance (Flashing) 10 Yellow Change 4 Red Clearance 2
Any Vehicle and Pedestrian Phase Movement (Actuated) Interval Time in Seconds Initial Green 10 Vehicle Extension (Passage) 3 MAX I 25 MAX II 30 Walk (Solid) 7 Red Clearance (Flashing) 10 Detector Memory ON Recall Mode PED.
Any Vehicle Exclusive Turning Phase Movement Interval Time in Seconds Initial Green 8 Vehicle Extension (Passage) 2 MAX I 20 MAX II 25 Yellow Change 4 Red Clearance 2 Detector Memory ON Recall Mode Vehicle Any required change or additions by the manufacturer to these time values shall be cleared through the Engineer before delivery of the controller assembly.
The MPS controller shall designate a digital microprocessor controller that conforms to all the DAN controller specifications, and shall include special programmable applications as specified in these specifications, and the plans. TABLE OF CONTENTS INDEX 892
The MPS Controller shall be a four -phase or eight -phase dual ring operation or twelve- phase dual or three ring operation as required in the plans. The type of MPS controller shall be designated by the special program applications required. The last letters shall designate t he following: MPS -SI Computer Supervised Unit - Interconnected MPS -SD Computer Supervised Unit - Dial Up MPS -P Programmed for Pre- Emption MPS -T Programmed for Time Base Coordination MPS -C Programmed for TM Coordination - Traffic Actuated Coordination MPS -M Arterial Master Controller - Interconnected MPS -SF Programmed for any additional Special Functions per Special Provisions. The MPS controller shall include the following features:
programming and module for Time Base Coordination with a front panel "D" connector, or auxiliary connector for all non- NEMA functions;
contained in a system or "D" connector only;
interface and port. The printer interface shall permit printout of all controller, coordinator, and pre-emptor operator entered data;
compatible for MPS -P pre -emptor programming. TABLE OF CONTENTS INDEX 893
In addition to meeting the DAN controller pre- approval requirements, the Department will require each MPS controller model and special program type to be tested and evaluated on a program -by-program basis before approval by the Engineer. Each approval will be limited to each type of program required by the Department, not by manufacturer or model. The number of manufacturers pre- approved by the Department may be limited for each type of program the Department requires. Existing Department approved controller programs shall be limited to the manufacturer's program version and model currently in operation for a specified geographic area as required by the Engineer. Approval of a MPS arterial or interconnected supervised controller unit shall be limited to the Department's operating computer management software and hardware.
The twelve -phase controller shall meet all DAN controller specifications plus the following functions:
contained in a "D" connector or auxiliary connector on the front panel ;
both vehicle and pedestrian timing ;
be operated in a special programmable concurrent phase or co- phase mode. Up to six phases may be used as co- phases. The co- phases shall be capable of being implemented to create additional rings. The co- phase timing parameters shall be entered from the front panel ;
Coordination and three pre- emption pr ograms; and
inputs. TABLE OF CONTENTS INDEX 894
The MPS -S computer supervised controller and the MPS -M arterial master controller for systems shall be pre- approved by the Engineer per the Department's computer hardware and software requirements. The MPS -C TM coordination and MPS -T time base coordination shall be pre-approved by the Engineer per the Department's system requirements. Each manufacturer's unit shall be readily interchangeable within the same model line.
included in each MPS controller unit. The MPS -T program shall consist of the hardware, software, and cabinet wiring to provide coordinated traffic flow without the use of interconnect cables between controller units in a dedicated geographic area. The MPS -T program shall be supervised by its own clock, which will monitor the program's memory so as to implement routine time of day, day of week, and week of year programs; as well as automatic daylight savings selection.
functions:
(intertie or dial -up) for a program monitoring and data down- loading and system data up- loading. The data down- loading and clock updating shall also be accomplished by a hand- held device;
following phase timing options: The MPS -T Controller shall have a coordination system "D" connector. The system connector shall function as input/output port and auxiliary output connector. All outputs shall be NEMA compatible; and
base coordination, user program data input, and the status read- outs, including cycle countdown and program data display, on the front panel. TABLE OF CONTENTS INDEX SECTION 7 34 895
The following cabinet wiring functions shall be included with the MPS -T controller cabinet assembly:
actuated mode I for the highway and mode II for cross street, unless otherwise specified;
switch for coordination, and free run modes of the coordinator program. The remote free input shall be wired to a cabinet terminal tie point ; and
be wired in the cabinet to program special functions via the coordination system "D" connector.
The MPS Controller shall include all the required hardware and CPU software so as to readily accept the addition of a MPS -P program. The MPS -P pre -emptor programmed controller unit shall be pre- approved by the Engineer as per the Department's requirements for any geographic area or system. Each manufacturer's unit shall be readily interchangeable within the same model line. The MPS- P pre -emptor program shall include all required hardware and programming with an input/output connector cable interface. The removal of the pre- emption module shall not interfere with the normal operation of the controller unit. The MPS -P controller shall have the pre- emption user program data inputs and status read- outs, including pre- emption intervals and program data, displayed on the front panel. The following is an outline for a MPS -P program scheme. Each MPS -P program shall be evaluated by this scheme.
The pre- emptor shall control intervals by ring. Before the initiation of pre-emption, a delay input interval must be completed. If the delay is released before timing out, the pre- emptor will not initiate time. During pre- emptor timing any higher priority pre- emption input will override the active pre -emptor mode. TABLE OF CONTENTS INDEX 896
The following interval functions and sequence per ring shall be programmed in the pre- emptor module. Interval 1: The minimum guaranteed green interval. The effective start time for this interval is when the phase that is timing enters green. Therefore, if the phase was in green longer than the interval programmed time prior to initiation of pre- emption, the pre- emptor will advance to interval 3. Interval 2: The minimum guaranteed green- pedestrian clearance interval. The effective start time for this interval is when the phase that is timing enters pedestrian clearance. Therefore, if the phase was in pedestrian clearance longer then the interval programmed time prior to initiation of pre-emption, the pre -emptor will advance to interval 3. Interval 3: The minimum guaranteed phase yellow clearance interval. The effective start time for this interval is when the phase that is timing enters yellow clearance. Therefore, if the phase was in yellow clearance longer than the interval programmed time prior to initiation of pre- emption, the pre- emptor will advance to interval 4. This interval will only be in effect if pre- emption was initiated during green or yellow. Pre- emption will terminate the green or yellow phase. Interval 4: The minimum guaranteed overlap yellow clearance interval. Any overlap is assigned to one ring that is timing during entry into pre- emption. The overlap will terminate when that ring starts interval. The effective start time for this interval is when overlaps go into yellow clearance. If the overlaps have been in yellow clearance longer than the interval programmed time prior to the initiation of pre- empt, the pre- emptor will advance to interval 5. Interval 5: The minimum guaranteed overlap all -red clearance interval. The effective start time for this i nterval is when the overlaps that are going to terminate and the phase that is timing are in red. This interval will stay in effect until all the overlaps that are going to terminate, and the phase that is timing has been in red for the programmed all -red time. The pre- emptor then will advance to interval 6. If there is no track clearance phase assigned to a ring, that ring will advance to interval 9. TABLE OF CONTENTS INDEX 897 Interval 6: The track clearance green interval. This interval will time the assigned track clearance green programmed time, and upon completion, the ring will advance to interval 7. Interval 7: The track clearance yellow interval. This interval will time the assigned track clearance yellow programmed time. When the timing is complete, the ring will advance t o interval 8. Interval 8: The track clearance all red interval. This interval will time the assigned track clearance all red programmed time. When the timing is complete, the ring will advance to interval 9. Interval 9: The hold/lock interval. When both r ings of the pre- emptor sequence have reached interval 9, the pre- emptor will be advanced to interval A. Interval A: The duration passage interval. This interval will time the completion of the programmed duration time. The duration time will start timing when the pre- emption sequence is started. Interval A will insure that the pre- emption sequence will not terminate until programmed time after initiation of pre- emption, regardless of the phases and intervals in effect during initiation of pre-emption or t he timing of intervals preceding interval A. The phase assigned for each ring shall operate as a hold phase. The options of "ped indications active" and "hold flash" take effect during this interval. Interval B: The hold/passage interval. The hold time wi ll start timing when pre- emption interval A starts. Interval B will insure a minimum time in the passage movement before pre-emption will be permitted to terminate. The interval will terminate only when the programmed time is complete and the pre- emption input is non- active, after which the interval will be set to C. The hold phases, "ped indications active" and "hold flash" shall be applied during interval B. Interval C: The hold/passage yellow clearance interval. At the completion of the hold/passage interval, the hold clearance yellow will time unless: TABLE OF CONTENTS INDEX 898
active, and exit as soon as interval B is complete.
back to interval B. When the hold/passage yellow clearance timing is complete, the interval will advance to interval D. Interval D: The hold/clearance all -red clearance interval. If the pre -emption call returns, the pre- emptor will go back to interval B. When the hold/passage all red clearance timing is complete, the interval will advance to interval E. Interval E: The exit lock interval for the pre- emptor. When both pre- emption rings get to interval E, the pre- emptor will exit the pre- emption sequence.
The Type MPS controller pre- emption module flash can be initiated in the following ways:
The pre- emptor flash control output shall be true (low) during pre- emptor flash. The controller signal output drivers will flash red if they are not assigned as a hold phase. The output shall flash yellow if assigned as a hold phase. The required preemption inter vals shall be programmed for single track or dual track clearance as shown on the plans. 734- 2.03 Control Cabinets:
The control cabinets covered in this section shall be used to house all traffic pre -timed and actuated signal controller assemblies and shall TABLE OF CONTENTS INDEX 899 include intersection controller cabinets and auxiliary controller cabinets. The cabinets shall be wired for all additional future phases and all associated equipment for the future phases shall be furnished and installed. Cabinets shall be wired and tested by the controller manufacturer or a representative designated by the controller manufacturer. The cabinet wiring shall be covered by the controller manufacturer's warra nty. The following cabinet types shall be supplied when specified on the plans. The cabinets shall be constructed according to the Traffic Signal and Highway Lighting Standard Drawings: Type I Pedestal Base Cabinet Type I Controller Cabinet Type I I Controller Cabinet Type III Controller Cabinet Type IV Controller Cabinet Type V Controller Cabinet Auxiliary controller cabinets shall be either a Type I controller cabinet for pole mounting or a Type II Load Center Cabinet for foundation mounting. The controller cabinet housings shall be of a NEMA 3 weather resistant construction. The steel cabinet housing and accessories shall be treated on the inside and outside with one coat of primer paint and painted with two coats of alum inum paint in accordance with Section 1002 of the specifications. Cabinets shall have continuous welded seams on all outside seams. The steel fabricated cabinet housings shall be constructed with No. 14 copper bearing sheet steel. The aluminum fabricated cabinet housings shall be constructed with No. 10 gage welded sheet aluminum. The cabinet finish shall be clean and not painted.
The doors shall have a neoprene gasket around the perimeters of each door frame. The door hinge pins shall be stainless steel. The main TABLE OF CONTENTS INDEX 900 controller cabinet door, except the Type I, shall have a two- position steel -bar type door stop. The main doors of the Types III, IV, and V controller cabinets shall be secured by a three- point locking device.
The main doors of controller cabinets shall have a standard traffic signal self-locking tumbler lock. The three- point door latch cam shall be steel. The pedestal base cabinet doors and the police panel doors shall have a standard police- type lock. The police -type lock key shaft shall be a minimum of 1 -3/4 inch in length. A minimum of two keys per lock shall be furnished with each cabinet.
Each controller cabinet shall be furnished with metal shelves capable of supporting all shelf mounted equipm ent without bending or sagging. The shelves shall not sag or restrict the free flow of air. The cabinets shall contain adjustable support brackets. For NEMA controllers the following shelf heights shall be furnished with the delivered cabinet:
provided for two- phase controllers; and
controllers, and pre- timed controllers.
The following accessories shall be provided with each controller cabinet as specified herein:
The Types II and III controller cabinets shall contain a minimum 15- inch fluorescent light fixture and lamp. The Types IV and V controller cabinets shall contain a minimum 18 -inch fluorescent light fixture and lamp. The fixture shall be mounted on the inside top of the cabinet near the front edge of the roof so that the front panels of the control equipment will be illuminated. A door -actuated, refrigerator -type, normally closed, durable push- button type switch shall automatically turn the light fixture on and off when the door is opened and closed. TABLE OF CONTENTS INDEX 901
The switches described in this section shall be provided for all solid state digital controller cabinets. Each switch shall be a commercial grade switch properly rated for the circuits they control. Each switch shall be individually labeled to identi fy its function. The label shall be an engraved laminated plastic legend plate or a permanently printed metallic legend plate. The following switches shall be mounted on the cabinet switch panel inside the controller cabinet housing:
shall operate with any controller unit which activates the controller indicator lamps;
flashing operation. During the flash operation the AC power shall be disconnected from the controller ;
Cabinets): A test switch shall be furnished to simulate a vehicle and pedestrian actuation. Each switch shall be a momentary contact push button. The metering controller shall have test switches for each detector input shown on the plans. Each switch shall be labeled to identify its function and phase;
is specified on the plans, it shall be controlled by a two-position toggle sw itch. The "Test" position shall manually turn on the pre- emption operation. The "Auto" position shall be for automatic external control of the pre- emptor ;
toggle switch shall be provided to permit stop timing/automatic mode of the controller's stop time function. The two positions shall be labeled "stop time - auto". When required, other special function switches shall be furnished. Such switches shall be of the proper voltage and current rating to perform the function as specified. The following switches shall be mounted in the police panel ;
control the AC power to the signal controller assembly. The switch shall be properly sized for the amperage of the equipment ; TABLE OF CONTENTS INDEX 902
transfer from automatic control to flashing operation. During the flash operation the AC power shall be maintained to the controller ; and
be controlled by a three- position double- pole, double- throw switch. The "Photo" position shall place the contactor under the control of the photoelectric cell unit. The "Off" position shall disconnect the contactor's coil from the photoelectric contr ol. The "Manual" position shall activate the contactor and turn on the intersection lighting.
A 120- volt AC, 15- Amp. NEMA 5 -15 G.F.I. convenience duplex outlet shall be mounted in each cabinet for energizing test equipment or tools. The outlet shall be fuse protected.
Controller cabinets containing solid state electronic equipment shall be ventilated by means of a 120- volt AC, 60- hertz, tube- axial compact type fan. The fan's free delivery air flow shall be not less than 100 cubic feet per minute. The fan housing shall be approximately 4 inches square by 1 -1/2 inches deep. The magnetic field of the fan motor shall not affect the performance of the control equipment. The f an bearings shall operate freely within the environmental standards specified herein. The fan unit shall not crack, creep, warp, or have bearing failure within a five- year rated duty cycle. The maximum noise level shall be 40 decibels. The fan unit shall be corrosion resistant. The cabinet fan shall be controlled by an adjustable snap action thermostat. The thermostat's turn- on setting shall be adjustable from 90 to 120 degrees F. The fan shall run until the cabinet temperature decreases to approximatel y 20 degrees F below the turn- on temperature setting. The fan shall be fused. The cabinet fan assembly shall be mounted either inside the control cabinet or inside a rainproof housing on top of the control cabinet. TABLE OF CONTENTS INDEX 903 The cabinet shall have louvered air inlets in the lower portion of the main door. A standard furnace filter shall be mounted behind all the louvered air inlets. The air outlets shall be screened on the exhaust side of the fan unit. The cabinet shall have a dust resistant air outlet baffle well secured and removable in the top of the cabinet. Auxiliary cabinets containing solid state electronic equipment shall use fan units with a free delivery air flow of not less than 100 cubic feet per minute. The fan unit shall be approximately 3- 1/2 inches square. All other fan characteristics shall be as described above in this section.
An engraved laminated plastic legend plate or a permanently printed metallic legend plate shall be provided inside the control cabinet for each control device, connector cable, connector, and fuse mounted in the cabinet. Each control device shall be labeled to identify the type of device and its connector number. Each fuse shall be labeled to identify its rating and circuit function.
The power supplied to the controller cabinet shall be 120- volt AC, two - wire, 60- hertz, single- phase service unless otherwise specified. The power leg to the controller and the signal load circuits shall be protected by a single- pole, 120- volt AC, circuit breaker. The breaker shall have a 10,000 ampere interruption rating, a trip indicator, and shall be the bolt -on type. The ampere rating shall be properly sized for the traffic signal intersection's load. The neutral service leg shall be connected to the AC neutral buss. The 120- volt AC intersection lighting control circuit, and the convenience outlet shall not be connected to the same service leg to which the controller's power supply is connected. The lighting load shall be 240- volt AC unless otherwise specified.
Each control cabinet shall be equipped with a single radio interference suppressor (RIS) of sufficient ampere rating t o handle the load requirements. The RIS shall be installed at the input power point. It shall minimize interference in both the broadcast and the aircraft frequencies, and shall provide a minimum attenuation of 50 decibels TABLE OF CONTENTS INDEX 904 over a frequency range of from 200 kilohertz to 75 megahertz, when used in connection with normal installations. The RIS shall be hermetically sealed in a substantial metal case which shall be filled with a suitable insulating compound. The terminals shall be nickel -plated 10/24 brass studs of sufficient external length to provide space to connect on No. 8 AWG wires, and shall be so mounted that they cannot be turned in the case. Ungrounded terminals shall be properly insulated from each other, and shall maintain a surface leakage distance of not less than 1/4 inch between any exposed current conductor and any other metallic parts. The terminals shall have an insulation factor of 100- 200 megohms dependent upon external circuit conditions. The RIS shall not be rated less than 50 amperes. The RIS shall be designed for operation on 115- volt AC ± 10 percent, 60-hertz., single- phase circuits, and shall meet the standards of UL and the Radio Manufacturers Association.
Each controller cabinet shall be provided with a 350- volt surge protector at the input power point. The surge protector shall reduce the effects of power line voltage transients and shall have ratings as follows: Impulse Breakdown Less than 1,000 volts in less than 0.1 microseconds at 10 kilovolts per microsecond Standby Current Less than 1.0 milliampere Striking Voltage 350 volts D.C. Shall be capable of withstanding 15 pulses of peak current each of which will rise in 8.0 microseconds to one- half the peak voltage at three- minute intervals. The peak current rating shall be 20,000 amperes.
Each 120- volt AC circuit that serves an inductive device, such as a fan motor, cabinet light, or a mechanical relay, shall have a suppressor to protect the controller's solid state devices from excessive voltage surges. Such suppressors shall be in addition to the surge protector at the main input power point.
All conductors used in controller cabinet wiring shall be No. 22 or l arger, with a minimum of 19 copper strands. Conductors shall conform to Military Specification MIL- W-16878D, Type B or better. The insulation shall have a minimum thickness of 10 mils and shall be nylon- jacketed polyvinyl chloride or shall be irradiated cross- link polyvinyl chloride, polyhalocarbon, or polychlor -alkene. TABLE OF CONTENTS INDEX 905
Lead- in wires, from the loop detector field terminals in the cabinet to the amplifier unit inside the cabinet, shall conform to one of the following: A twisted pair of No. 22, or larger, conductors. A cable containing two No. 22, or larger, conductors with each conductor insulated with either (1) a minimum of 10 mils of polyvinyl chloride and 2 mils of nylon, or (2) a minimum of 14 mils of polyethylene or polypropylene. The conductors shall be twisted pairs with three to six turns per foot. The cable shall be provided with a polyethylene or polyvinyl chloride outer jacket with a minimum thickness of 20 mils, or with a chrome vinyl outer jacket with a minimum thickness of 25 mils. All conductors used in controller cabinet wiring shall conform to the following color code requirements: The AC common conductors shall be identified by a continuous white or natural gray. The chassis ground conductors shall be identified by a continuous green color with one or more yellow stripes. The non- grounded conductors shall be identified by any color not specified above.
Each of the load switch outputs (120- volt AC) and the flash transfer relay load base terminals shall be hard- wired wit h a minimum No. 14 copper conductor with a 90 degrees C rated jacket, or No. 16 copper conductor with a 105 degrees C rated jacket. The 120- volt AC load switch and flash relay terminals shall be soldered to each base terminal.
The AC+ signal load switch buss shall be controlled by a signal -pole 120- volt AC mercury contactor or an auxiliary control relay. The minimum contactor size per switch buss shall be 30 amperes.
All load switches, flashers, and flash transfer relays shall be mounted on a load bay panel or back panel assembly of the appropriate size. TABLE OF CONTENTS INDEX 906 Each load switch input from the controller shall be programmable on the back panel by use of removable jum pers to facilitate possible redesignation of output assignments due to future phasing requirements. Detector amplifier modules may be mounted on the panel in lieu of a detector rack. The signal load panel or back plane panel shall be easily removable from the cabinet for repair in the field. All the control hardware and wiring shall be mounted and installed so as to permit the main back panel to be released and dropped for the service repairs in less than 10 minutes. The load bay or back plane panel shall be wired to include all future signal phases and operations shown on the plans. Printed circuit board type back panels shall only contain 0- to 24 -volt DC circuits. No 120- volt AC circuits will be allowed.
When specified, the controller cabinet shall include the cabinet wiring provisions for a pre- emptor controller unit and its cables.
Meter pedestal cabinets shall be furnished and installed in accordance with the project plans and specifications. The cabinet shall be UL listed. The cabinet shall be 12 gage steel of tamperproof construction with piano- hinged doors and provisions for padlocks. The top and front covers of the cabinet shall be 16 gage steel. The cabinet shal l be treated on the inside and outside with one coat of primer paint and painted with two coats of aluminum paint, conforming to the requirements of Section 1002 of the specifications. The cabinet shall be completely wired with copper conductors to include the required circuit breakers and lighting contactors and shall be wired and equipped to handle electrical service loads as detailed on the project plans. The service pull section shall be 4- 1/2 inches deep and shall be located in back of the cabinet. A n access opening in the cabinet shall be provided at the bottom of the service pull section. Each cabinet shall have a detachable pad mount sleeve for easy installation in concrete which can be bolted to the base of the pedestal. Electrical service shall b e 120/240- volt 60- hertz, three- wire service. TABLE OF CONTENTS INDEX 907
The cabinet -mounted service enclosure shall be mounted on the back of control or load- center cabinets to provide a combination of metered and unmetered service for traffic signals and highway lighting, respectively. The service enclosure shall provide for both metered and unmetered load circuits. The enclosure shall be rated for 100- ampere continuous service and shall comply with the requirements of the serving uti lity company. The cabinet -mounted service enclosure shall be fabricated from 14 gage zinc- coated steel with tamperproof construction. The enclosure shall be a NEMA 3R rainproof type with provisions for padlocks. The enclosure shall have factory installed breakers, sockets and other components and shall be U.L. listed. The installed conductors shall be copper of the size and type to conform to the NEC and U.L. requirements. The enclosure shall be finished with one coat of primer paint and two coats of alum inum paint conforming to the requirements of Section 1002 of the specifications.
Concrete for cabinet foundations shall be 3,000- pound per square inch ClassS concrete. 734- 2.04 Auxiliary Control Equipment: The auxiliary equipment described in this section shall be supplied and installed as required inside the controller cabinet. All auxiliary equipment shall conform to current published NEMA Standards pertaining to that device.
The flasher control equipment shall consist of a complete electrical assembly which shall provide flashing traffic signals by enabling flash relays when the auto/flash switch or conflict monitor is activated. The relays shall be the flash load relay type as specified herein.
The flasher unit shall be a solid state NEMA -type flasher. All flashers for signalized intersections, pole flashers, and overhead flashers, shall be the dual circuit type. TABLE OF CONTENTS INDEX 908 All the flashers shall be constructed of replaceable, molded relay modules. Each relay module shall have the specified ampere capacity and shall operate with zero point switching. The flasher shall turn on within 5 degrees of the zero voltage point of the line sinusoid and shall turn off within 5 degrees of the zero current point of the line sinusoi d. The flashing rate shall be 55 to 60 flashes per minute with a 50 percent duty cycle. Solid state flashers shall be one of the following types: Type 1 20 amperes per circuit, single circuit Type 2 20 amperes per circuit, dual circuit The flashers shall interconnect with a six- pin Cinch- Jones, S -406-SB socket. The flasher shall either have a support bracket or shall be mounted in a rack frame.
Load switches shall mee t the requirements of NEMA for three- circuit load switches. Each load switch shall contain three individually replaceable, solid state relay modules. Each relay module shall utilize optical isolation between the input and the output. The relay module shall have the following functions and terminal assignments: Terminal Function 1 120 volt AC Output 2 120 volt AC Line 3 +12 to 28 volts DC 4 Sequence Input (Ground)
Each panel of load switches shall either be rack mounted or shall have a switch support bracket extending across the entire length of the switch panel. The load switch unit shall have three indicators to designate when the AC output circuits are activated. Each indicator shall monitor the outputs and shall be labeled top to bottom "R " Red, "Y" Yellow, and "G" Green, on the front panel of the load switch unit.
Flash load relays shall be for the purpose of providing special circuitry or operational requirements. The relays shall be the double- pole, double- throw type. TABLE OF CONTENTS INDEX 909 Flash relays shall interconnect with a Cinch- Jones type eight -pin socket or an approved equal. The relay shall be covered with a clear dust cover which shall be secured to the relay base with a fastening device. The relay contact points shall be of fine silver or silver alloy, or a superior alternate material, and shall be capable of carrying a load of 20 amperes per contact unless otherwise specified at 120 volts AC. The relay shall show no failure while making, carrying, and breaking a 10-ampere, 120 -volt, traffic signal lamp load through 10,000 cycles at the rate of 10 cycles per minute and a 50 percent duty cycle. Each relay shall be capable of making, breaking, and carrying all the current for a 1,000- watt tungsten lamp load without burning, pitting, or otherwise failing for at least one million operations. The relay shall be electrically and mechanically operative after a momentary current of 100 amperes at 120 volts is applied to the set of closed contacts at least five times with a minimum of two minutes between applications of current. The relay shall not break down or flash over while carrying a load of 10 amperes at 120 volts for at least 50 cycles at the rate of five cycles per minute. The duty cycle shall be 50 percent on and 50 perce nt off. The relay shall withstand 1,500 volts at 60 hertz between insulated parts and between current carrying parts and grounded or non- current carrying parts.
These types of relays shall be utilized in circuits to provide special operations. Auxiliary control relays shall have a pin- type connector on the base. The relay shall be removable without the use of tools. The relay shall be covered with a removable dust cover. The relay coil shall be rated at 120- volts AC, 28- volts AC /DC, or 12 -volts AC/DC as required. The contacts shall be single- pole or double- pole. The number of contacts shall be as required by the relay's operational functions. The contacts shall be properly rated for the circuit load and shall be constructed of gold - and/or silver -plated material.
The conflict monitor shall conform to the current NEMA specifications. Fully programmable monitors shall be programmed with soldered wire jumpers on a NEMA interchangeable programming card. Jumpered channels shall represent nonconflicting phases. Non- jumpered channels shall be in conflict with any other channel. TABLE OF CONTENTS INDEX 910 When a malfunctioning monitor is replaced in the field, the replacement monitor shall be field programmable without the use of tools. The jumper numerical sequence shall be standard NEMA matrix. The monitor shall have an active indicator for each channel.
The correct type and quantity of detector ampli fiers shall be furnished as specified herein, as required on the plans. Unless otherwise specified, all detector amplifiers shall be rack mounted or mounted on a load bay panel with support brackets. Each rack position shall be labeled. Each detector card shall be the edge connected type. The detector edge connector shall be a 44- pin double read- out contact. The connector shall have 0.128- inch diameter mounting holes on each end, MIL- M-14 insulation material, and MIL- C-21097 contacts. The edge connector terminals, for the specified type of detector amplifier, shall be wired as specified herein. All of the detector channel inputs and outputs, including those channels specified for future use, shall be wired from the mounting rack to the tie points and the field terminals of the controller cabinet. Each amplifier rack assembly shall include one power supply card per each set of four detector amplifier modules. The required number of power supply cards shall be furnished with each rack assembly which shall include the quantity of power supply cards for future phases shown on the plans and one spare edge connector. The required quantity of amplifier modules, including those required for future phases shown on the plans, and one spare edge connect or shall be furnished with each control cabinet assembly. The amplifier rack positions shall be mechanically and electrically interchangeable such that amplifier modules of different manufacturers can be connected into any amplifier module positions. The rack spacing shall be for NEMA 2.31- inch wide front panels on all card rack units.
A rack- mounted 24- volt DC power supply shall be furnished with each controller cabinet assembly with more than two amplifier modules. Each detector amplifier module shall have a 24 -volt DC power supply. The power supply shall have four power outputs each fused and rated at 300 TABLE OF CONTENTS INDEX 911 milliamps and 24 volts DC and a maximum ripple voltage of 2.2 volts peak to peak. All 120- volt AC circuits shall have fused inputs. The power supply PIN numbers and functions shall be as designated in the following table: Standard Input and Output Functions for Vehicle Detection Assembly Power Supply Pin No. Function Pin No. Function A Output Logic Ground 1 (Redundant Side) B Output 1 (+24 -volt DC) 2 C 3 D 4 E 5 F 6 H 7 J 8 K 9 L Chassis Ground 10 M 115-volt AC ( -) 11 N 115-volt AC (+) 12 P 13 R 14 S 15 T 16 U Output 3 (+24 -volt DC) 17 V Output 4 (+24 -volt DC) 18 W 19 X 20 Y 21 Z 22
There shall be one amplifier channel per detector, except for the 6- by 6-foot detectors, unless otherwise specified. The amplifier unit shall utilize digital solid state circuitry. The detection, frequency counting, and inductance measuring circuitry shall utilize crystal controlled MOS -LSI microelectronic circuits. The loop detector amplifiers shall detect all licensed motor vehicles when using the loop configurati on shown on the plans. The loop amplifiers shall be operational when using up to 1,000 feet of lead- in cable for a 6 by 6-foot, three -turn, loop. Each loop detector amplifier shall detect vehicles at speeds of zero to 80 miles per hour using loop configurations ranging from: 6 by 6 feet - two-turn, 6 by 50 feet - one- turn, 6 by 70 feet - one-turn; up to 6 by 100 feet - one- turn loops. The TABLE OF CONTENTS INDEX 912 smaller size 6 by 6-foot loop sensors shall be capable of being connected to the amplifier in series and/or parallel as required.
The loop detector amplifier unit shall contain two to four channels per unit. The following types of loop detector card rack units shall be used to identify the number of detector channels and timing functions for each card: LCR- 2 Loop detector card unit with two channels. LCR- 2T Loop detector card unit with two channels having timing functions. LCR- 4 Loop detector card unit with four channels. LCR- 4T Loop detector card unit with four channels having functions. No single channel amplifier shall be utilized. All loop detector card units shall be mechanically and electrically interchangeable with other card units of the same type and function from different manufacturers. The loop modules and loop modules with timing function PIN numbers and functions shall be as designated in the following table: TABLE OF CONTENTS INDEX 913 Standard Input and Output Functions for Vehicle Detection Assembly Loop Module 2 or 4 Channel Pin No. Function Pin No. Function A Logic Ground 1 Channel 1 Green B +24-volt DC IN 2 Channel 2 Green C 3 Channel 3 Green D Loop 1 Twisted 4 E Loop 1 Pair 5 F Output 1 (+) 6 H Output 1 ( -) 7 J Loop 2 Twisted 8 K Loop 2 Pair 9 L Chassis 10 Channel 4 Green M 11 N 12 P Loop 3 Twisted 13 R Loop 3 Pair 14 S Output 3 (+) 15 T Output 3 ( -) 16 U Loop 4 Twisted 17 V Loop 4 Pair 18 W Output 2 (+) 19 X Output 2 ( -) 20 Y Output 4 (+) 21 Z Output 4 ( -) 22
Standard loop detector racks for amplifiers not requiring timing functions shall still be wired for possible future use of timing functions (pins 1, 2, 3, and 10). The wires from these pins shall be tied to spare terminal block tie points in the cabinet. Polarization keys shall be located at three positions:
Each amplifier channel shall have a front panel mounted indicator to provide a visual indication of each vehicle detection. The indicator shall be visible in bright sunlight from 3 feet directly in front of the amplifier. The amplifier shall operate in compliance with all the requirements herein specified when connected to an inductance loop plus lead- in, of from 50 to 500 microhenries with a loop Q parameter as low as 5.0 at the amplifier's operating frequency. TABLE OF CONTENTS INDEX 914 Each channel's call output shall be an optically isolated solid state type. Each amplifier channel shall conform to the following requirements:
or self -tuning and shall be fully operational within three minutes after power up. After a power interruption, the channel shall automatically return to normal operation;
designed so that changes due to environmental drift and applied power fluctuations shall not cause an actuation. Self -tracking shall be capable of compensating for environmental changes of up to 0.001 percent per second. The requirement must be met within two hours after initial power up. The channel shall be capable of normal operation as the input inductance is changed ± 5.0 percent from the quiescent turning point regardless of initial circuit drift ; and
mode selection switch on the front panel which shall per mit the selection of either the presence mode or the pulse mode of operation. In the pulse mode, the pulse width shall be 100 milliseconds unless otherwise specified. Each module shall have an off switch position for disabling unused channels.
The following special timing functions shall be furnished only when specified on the plans or in the Special Provisions.
delay the call output up to 15 seconds after the vehicle enters the l oop sensor. The timer shall be adjustable, from 0 to 15 seconds, into no more than 1.0- second increments;
shall carry over (i.e., extend) the call output up to seven seconds after the vehicle leaves the loop sensor. The timer shall be adjustable, from zero to seven seconds, in not more than 0.5 - second increments. When any of the above special functions are specified, then that special function shall be furnished on all channels of the same amplifier module. TABLE OF CONTENTS INDEX 915
Each of the amplifier channels shall have a minimum of three sensitivity settings per detection mode. The settings shall be selectable from the front panel. The highest sensitivity sheeting shall consistently respond to a l oop inductance change of 0.02 percent. The lowest sensitivity setting shall respond to nominal loop inductance changes of from 0.15 to 0.4 percent. All modules must have sensitivities which differ by not more than ± 0.05 percent change in inductance from the nominal value chosen. A channel shall not respond to loop inductance changes less than 0.1 percent in the lowest sensitivity setting.
The amplifier channel response time in the lowest sensitivity setting shall be less than 20 milliseconds. For any negative inductive change which exceeds the sensitivity threshold, the channel shall output a ground true logic level within 20 milliseconds. When such inductance change is removed, the output shall become an open circuit within 20 milliseconds. For test purposes, a negative change of inductance shall be maintained for a minimum of 100 milliseconds and a maximum of 600 milliseconds after it is applied. When the response time differences are averaged over 10 trials, the value of that average difference shall not exceed 10 milliseconds. The response time of the detector channel for the highest sensitivity setting shall be less than 250 milliseconds for a 1.0 percent inductance change.
Each channel shall have a minimum of three operating frequencies. The frequency switch may be either on the front panel or on the circuit board. Frequency selection shall be possible without the use of tools.
The detector channel, in the least sensitive position, shall maintain the presence detection of a vehicle for a minimum of four minutes while the vehicle is over the loop sensor and is causing an inductance change of 1.0 percent or greater. The channel, in the highest sensitivity position, shall maintain the presence detection of a vehicle for a minimum of three minutes while the vehicle is over the loop sensor and is causing an inductance change of 0.02 percent or greater. TABLE OF CONTENTS INDEX 916
The operation of the amplifier shall not be affected by environmental temperature changes at the rate of 1.5 degrees F per three minutes.
Each channel shall not cause crosstalk with any other channel either within the same amplifier or within any other amplifier that is mounted in the same cabinet assembly. An amplifier channel shall not detect vehicles, moving or stopped, at distances of 3 feet or more from the loop perimeter to which it is connected.
Each amplifier shall have lightning protection as an integral part of its own circuitry. The protection shall enable the detector to withstand the discharge of a 10- microfarad capacitor, charged to 1,000 volts. The discharge shall be applied directly across the detector loop input pins with no loop load present. The protection shall enable the detector to withstand the discharge of a 10-microfarad capacitor, charged to 2,000 volts. The discharge shall be applied directly across either the detector loop input pins or across either side of the loop input pins to earth ground. For this test, the detector chassis shall be grounded and the detector loop input pins shall have a 5.0- ohm dummy resistive load connected across them.
Each channel shall have a fail -safe design such that if the loop sensor circuit is open, the channel shall output a continuous vehicle call.
Each loop sensor shall be coupled to the channel input by isolated transformers. The isolated input shall provide continued operation of the channel if the loop sensor in the street becomes grounded or has resistive leakage to ground.
The magnetometer detector shall detect all licensed motor vehicles when using the probe conf iguration shown on the plans. TABLE OF CONTENTS INDEX 917
The amplifier shall be operational with up to 12 probes per channel, up to 2,000 feet of lead- in cable, and vehicular speeds up to 90 miles per hour. Each amplifier shall have two independent channels per card. The card shall be connectable in any detector rack position. Solid state circuitry shall accurately measure changes in the earth's vertical magnetic field intensity caused by motor vehicles. The front panel shall have a cal ibration control for each channel to calibrate the amplifier for the local magnetic field strength. Each amplifier channel shall have a front panel mounted indicator to provide a visual indication of each vehicle detection. The indicator shall be visible in bright sunlight. Each channel call output shall be an optically isolated solid state NPN transistor with a normally open collector which shall be rated for a 5 - milliampere load and 0.7- volt drop maximum. The collector shall be rated for 30- volts DC when in the off mode. Each magnetometer amplifier shall conform to the magnetometer table and the following requirements:
Each channel shall permit the selection of either a presence mode or a pulse mode. Each channel shall be independent of the other channel of the amplifier. In the presence mode, the channel shall indicate the presence of a vehicle until the vehicle leaves the detection area. The indication shall then cease in 100 milliseconds. In the pulse mode, the channel shall output a single 30- to 50 -millisecond pulse for each vehicle entering the detection area.
Each channel shall have the following independently selectable functions. The functions shall be selectable from the front panel:
This timing function shall inhibit subsequent call outputs up to five seconds after each vehicle leaves the sensor area.
This timing function shall carryover or extend the call output up to five seconds after each vehicle leaves the sensor area. TABLE OF CONTENTS INDEX 918
The operation of the amplifier shall not be affected by nominal changes in the environment.
Each amplifier channel shall operate with one to twelve sensor probes. Standard Input and Output Functions for V ehicle Detection Assembly Magnetometer Module 2-Channel Pin No. Function Pin No. Function A Logic Ground 1 No Connection B +24-volt DC IN 2 No Connection C 3 No Connection D Probe Set 1 (White) 4 E Probe Set 1 (Black) 5 F Output 1 (+) 6 H Output 1 ( -) 7 J Probe Set 1 (Red) 8 K Probe Set 1 (Green) 9 L Chassis Ground 10 No Connection M 11 N 12 P Probe Set 2 (White) 13 T Output 2 ( -) 16 U Probe Set 2 (Red) 17 V Probe Set 2 (Green) 18 W 19 X 20 Y 21 Z 22 A polarization key shall be located between pins R/4 and S/15.
Each pedestrian push button, bicycle push button, or remote vehicle detector call input to the controller shall be isolated from the controller's logic ground by an auxi liary isolation relay. The isolation relay will be provided and installed by the Department. The size of the relay will be 1.6 inches wide by 2 inches long. The terminal strip shall be provided and wired by the contractor. The terminal strip shall be the Type 141 with terminals in multiples of four. The size shall be 1- 1/8 inches wide by 1/2 inch deep. The terminal spacing shall be 7/16 inch. The screw size shall be 6- 32. TABLE OF CONTENTS INDEX 919
The isolation relay shall be mounted on the A -side of the terminal strip. The A -side shall be the left hand side when the terminal strip is mounted vertically, the top side when the terminal strip is mounted vertically, or the top side when the terminal strip is mounted horizontally. Terminal No. 1 shall be the top terminal when mounted vertically or the first terminal from the right when mounted horizontally. A field terminal shall be provided to connect the detector call field inputs to the A -terminal strip.
The B -side of the terminal shall be wired as follows for each relay required: Terminal Function 1 +12 or 24 -volt (DC or AC) 2 Logic ground 3 (N.O.) Det. Call (for specified phase) 4 Det. call field input (for specified phase)
A power supply external to the controller shall be provided for the isolation relays. The controller power supply shall not be used for this purpose. 734- 2.05 External Logic Circuit Boards:
External logic that is required to supplement the controller or auxiliary control units shall be on solid state, plug -in cards. The logic cards shall be designed as specified herein. The logic cards shall be the 22- pin, edge- connector or octal -base type. The pins shall be either single- or double- sided as required. Each card shall be keyed to prevent the improper connection of the card. The printed circuit board shall meet the requirements of NEMA TS1- 14.2.3. Power supplied from the controller's power supply shall not exceed 350 milliamperes. If more than 350 milliamperes is required, then a separate external power supply must be utilized. Such an external power supply may be either shelf -mounted or rack- mounted. The logic circuitry shall be properly interfaced and buffered from the controller and other controller assembly equipment. TABLE OF CONTENTS INDEX 920 All external logic timing functions shall be digital and shall be in the required timing range. Timing entries shall be front -panel programmed without the use of tools or software and shall be accessible without the removal of the enclosure's cover. The timing shall be set by thumbwheel switches, programming pins, or digital binary (DIP) switches. The timing accuracy shall conform to NEMA TS1- 2.1.11 for digital timing.
When specified, each controller cabinet shall include a solid state digital time switch of the type specified, wired for the function detailed in the Special Provisions or plans. The solid state digital time switch shall utilize solid state circuitry and digital timing techniques. Integrated or discrete semi -conductor devices shall be used exclusively. No electro- mechanical parts shall be employed except for the controlled circuit output relay. The design life of all components under 24- hour -a-day operation in their electrical applications shall be not less than 10 years. All components shall be clearly identifiable by markings on circuits boards or parts numbers on pictorial diagrams.
Each time switch shall control the required number of circuit outputs in a 24- hour period, for seven days w ith an omit control for any one or more of the seven days. The time switch shall be powered by a 120 -volt 60- hertz input in the temperature range between 30 and 165 degrees F. The 60 -hertz line frequency shall be the time base for the clock.
The time switch shall have a battery back -up circuit which shall power the timer for not less than 12 continuous hours during the loss of electrical A.C. power. Battery back- up shall generate its own time base, and clock accuracy shall be w ithin 0.02 percent. During battery back- up operation, all luminous displays and relays shall be disabled. During normal operation, the battery shall be trickle charged. The rechargeable battery system shall be an integral part of the time switch housing . The battery unit shall include an on- off control switch to permit it to be disconnected from the time switches.
Programmed time entries shall be front -panel programmed without the use of tools or software. The programming of the selectable functions TABLE OF CONTENTS INDEX 921 and time operations shall be set by thumbwheel switches, programming pins, DIP switch, or front -panel keyboard entry. All programming pins shall be the printed circuit receptacle, non-corrosive, turning -fork type. The pin contactor shall fit any standard 0.055- inch to 0.73- inch board. The pins shall be rated 600 volts RMS at 5 amperes. The time operations shall be programmable to a one- minute increment.
The time switch shall have a digital time- of-day display; 24- hour or with A.M./P.M . indicator; in hours and minutes past midnight. There shall be a day- of-the-week- in-effect indicator. A separate indicator shall indicate when an output circuit is active (on).
Each output control circuit shall be a single- pole, double- throw independent relay output. The relay shall be rated not less than 5 amperes at 120 volts AC. The relay shall be energized when the clock program is on, and de- energized when the clock program is off.
The time switch shall have the 120- volt AC input fused to protect its internal circuitry. Line transients normally experienced in traffic signal controller environments shall not affect the clock accuracy herein specified. Line transient protection devices shall be provided to prevent these inaccuracies.
The entire time switch shall be completely enclosed in a dust resistant housing. The housing door shall enclose all the program switches, display and indicators. The housing shall contain solderless lug -type terminals or a detached connector.
The solid state digital time switches shall be designated in the Special Provisions or plans with the following five- position alphanumeric code. The code shall have the following meaning: The type DTS clock shall mean the solid state digital time switch. TABLE OF CONTENTS INDEX 922 DTS -1-1 is a single program, single circuit. DTS -1-3 is a single program, three -circuit. DTS -3-3/4 is a three program, three or four -circuit as required. The single program shall have seven on -off operations per unit and three on-off operations per circuit in a 24- hour period. Each program shall be selectable for day omit (days 1 through 7). The solid state time switches shall have an 11- pin octal connector. The cabinet shall have a female interface connector as shown in the following table: Cabinet Solid State Time Switch Interface Connector Pin No. Function 1 Common No. 1 2 Output No. 1 N.O. 3 Output No. 1 N.C. 4 Common No. 2 5 Output No. 2 N.O. 6 Output No. 2 N.C. 7 AC Common 8 Common No. 3 9 120-volt AC Input 10 Output No. 3 N.C. 11 Output No. 3 N.O. 734- 3 Construction Requirements: 734- 3.01 General Requirements: All traffic controller assembly equipment shall be furnished and installed as shown on the plans, and in accordance with the Special Provisions and these specifications. Cabinet wiring, connecting cables, support bases, and shelves shall be provided to allow for future installation and use. 734- 3.02 Test Requirements:
All specified traffic controller assembly items shall meet the applicable environmental and testing standards of NEMA Publication TS -1. All traffic signal controller units shall be tested by the Department's testing procedures. TABLE OF CONTENTS INDEX 923 734- 3.03 Wiring and Grounding Requirements:
All cabinet wiring shall be neatly arranged and made tight by the use of wiring harnesses, cable sheaths, cable wraps, or raceways. All wires in a harness shall be laced or bound together. Harnesses shall be routed to minimize crosstalk and electrical interference. Cabling shall be routed to prevent conductors from being in contact with metal edges. Cabling shall be arranged so that any removable assembly may be removed without disturbing conductors not associated with that assembly. All pin assignments shall be wired to the controller cabinet terminal for future use. The following time- base coordination wiring functions shall be provided when MPS coordination is specified to be furnished in the control cabinet :
coordination, and free run modes of operations. The remote free input shall be wired to a cabinet terminal tie point to permit control input from a remote input ; and
connector output shall be wired in the cabinet to program the Max 2 Function.
The conflict monitor unit cable shall be wired to perform the following functions:
for future use shall have a removable jumper so as to permit future implementation of that phase without rewiring the controller cabinet ;
unit and a ny auxiliary controller unit ;
TABLE OF CONTENTS INDEX 924
interlock A and B wired to control cabinet tie points for future use; and
terminated at the furthest field terminal point, so as to monitor both the automatic and flash modes of the controller cabinet.
All controller cabinets and auxiliary cabinets shall have the AC common, the logic ground, and the chassis ground isolated from each other as detailed in the current NEMA Standards.
All field terminals shall be installed on a terminal support which shall be located at the rear of the lower portion of the controller cabinet and not less than 5 inches from the base of the cabinet. All connectors for field terminals shall be connected to barrier -type terminal blocks. Each terminal block position shall have two No. 10-32 screw connectors (not less than 3/8 inch in length), and a removable shorting bar. Each terminal shall accommodate at least three No. 12 AWG conductors. The terminal block shall have a labeling strip for each position. All controller assembly wiring tie points on the front side of the terminal blocks shall be the spade type. Tie points of the back side of terminal blocks shall be soldered to a lug. All crimp style connectors shall be applied with the proper tool. The tool's handles shall not open until the crimp is completed. Each terminal position shall be permanently labeled at the terminal position. Tie points shall be required for all controller unit and auxiliary control equipment circuits.
The pre-emption cabinet shall include a load switch circuit to operate the pre- emption "No Right Turn" illuminated message signal (120- volt AC output). The field terminals shall include the following terminal positions:
TABLE OF CONTENTS INDEX