Operation Manual January Opticom Infrared System. 700 Series Emitters Detectors Phase Selectors Discriminators Accessories

Transcription

1 Operation Manual January 2009 Opticom Infrared System 700 Series Emitters Detectors Phase Selectors Discriminators Accessories

2 Table of Contents 1. Introduction System Theory of Operation Major Components Emitters Detectors Phase Selectors/Discriminators Accessories Confirmation Lights Auxiliary Interface Panels Operation Emitters Overview Model 792 Series Emitters Controls, Indicators, and Wiring Specifications Block Diagrams Model 492 Series Emitters Controls, Indicators, and Wiring Specifications Block Diagram Detectors Overview Detector Features Configuring Detectors Detector Reception Angle Detection Coverage Model 700 Series Detectors Model 711 Detector Model 721 Detector Model 722 Detector Operational Description Specifications Block Diagrams Model 711 Detector Model 721 Detector Model 722 Detector Phase Selectors/Discriminators Overview Model 750 Series Phase Selectors Controls, Indicators, Connectors, and Wiring Operational Description Specifications Block Diagrams i

3 Table of Contents Opticom Infrared System 5-3. Model 450 Series Discriminators Controls, Indicators, Connectors, and Wiring Operational Description Specifications Block Diagrams Accessories Model 138 Detector Cable Specifications Model 560 System Chassis Wiring Specifications Model 755 Four-Channel Adapter Card Specifications Model 756 Auxiliary Harness Wiring Specifications Model 757 Auxiliary Interface Harness Wiring Specifications Model 758 Auxiliary Interface Panel Wiring Specifications Model 760 Card Rack Wiring Specifications Model 798 Emitter Bezel Mount Kit Specifications Emitter Reflector Lens Assy Specifications Model 832 Communication Module Specifications Interface Software ITS Link Series Interface Software (790-CS) Series Interface Software (750-CS) Maintenance Preventive Maintenance Emitters Detectors Phase Selectors/Discriminators System Maintenance Troubleshooting A. Glossary... A-1 B. Drive a Relay from a Phase Selector Output... B-1 ii

4 1. Introduction This Operation Manual contains Opticom Infrared 700 series system operation, maintenance, and troubleshooting information. The manual is divided into eight sections and one appendix. Section 2 contains a general operational view of Opticom components, as well as a description of how they work together in a matched-component system. Sections 3 through 6 are devoted to the individual system components. Section 7 describes how to maintain the system to ensure proper system operation. Section 8 contains system and component troubleshooting information. Appendix A is a glossary of terms used in this manual. Appendix B describes how to connect a relay to a phase selector/discriminator output.

5 2. System Theory of Operation 2-1. Major Components The Opticom Infrared 700 series system consists of three major component groups: vehicle-mounted emitters, detectors mounted at or near the traffic intersection, and phase selectors or discriminators mounted in the traffic controller cabinet Emitters An emitter, with an appropriate emitter control switch module, is mounted on the priority vehicle. The emitter generates a series of pulses in infrared and visible wavelengths Detectors Detectors are mounted at or near the intersection and are aimed so they have an unobstructed view of the approach to the intersection. The pulses generated by the emitter are sensed by the detector, which converts the infrared energy into electrical signals that are transmitted by the detector cable to the phase selector/discriminator in the traffic controller cabinet Phase Selectors/Discriminators Phase selectors/discriminators are mounted in the traffic controller cabinet. A phase selector/ discriminator discriminates between valid emitter signals and other sources of energy received from the detectors, and activates its outputs in response to valid priority emitter signals. The phase selector/ discriminator outputs are connected to the traffic controller s inputs to request the traffic controller to deliver the desired green for the priority vehicle. Card racks or input files provide the power and logic wiring for the phase selector/discriminator, which plugs directly into a slot in the unit. 2. System Theory of Operation 2-2. Accessories Some of the accessories used with 700 series equipment include confirmation lights and auxiliary interface panels Confirmation Lights Confirmation lights are mounted at the intersection and aimed at approaching traffic. They are intended to indicate to emergency vehicle drivers that their call was received. Confirmation lights are not required for Opticom system operation. They are optional. Various patterns of confirmation light activity are available. You can select a pattern appropriate for your system needs and for those of the surrounding jurisdictions (if appropriate). You select the confirmation light pattern using 750 configuration interface software (750-CS) Auxiliary Interface Panels A Model 758 auxiliary interface panel is recommended for installations using auxiliary detectors and is required for installations with confirmation lights that are controlled by the phase selector. The auxiliary interface panel is a terminal block assembly designed for easy connections between the phase selector/ discriminator and the traffic controller wiring Operation When an emitter-equipped vehicle, with the emitter turned on, approaches an Opticom Infrared system equipped intersection, the detector senses the emitter signals, converts the infrared signals to electrical signals, and transmits the signals by cable to the phase selector/ discriminator. The phase selector/discriminator verifies the signal validity and requests the traffic controller to give the approaching vehicle a green light. This process of granting momentary right-ofway to an approaching priority vehicle continues intersection-by-intersection as needed. 2-1

6 2. System Theory of Operation Opticom Infrared System This page intentionally left blank. 2-2

7 3. Emitters 3-1. Overview The emitter, with an appropriate emitter control switch module, is mounted on the priority vehicle. When activated, the emitter generates a series of pulses in infrared and visible wavelengths. The detector mounted at the intersection senses the emitter pulses. The sensed pulses are processed and forwarded to a phase selector or discriminator for further processing. A system-level theory of operation is covered in Section 2 of this manual. Model 792 and 492 series emitters are rugged, compact, lightweight, weather-resistant, encoded signal devices intended for use on priority, maintenance, and transit vehicles. In addition, Model 792 series emitters can be used on probe vehicles. Probe frequency does not provide priority control; however, it does provide vehicle presence (class and ID information) to Model 750 series phase selectors. The emitter housing contains a reflector/flashtube/ lens assembly, an integrated power supply, and pulse timing circuitry. Included with the emitter is an installation cable, mounting hardware, and installation instructions. The emitter may be surface mounted on the vehicle with the bracket provided, recess mounted into a vehicle panel with an optional mounting kit, or mounted in a lightbar. Most emitters have a clear lens, but some models have an opaque lens that appears black. This lens is known as a visible light filter and it filters out wavelengths of light that are visible to the human eye, but allows infrared wavelength energy to pass. This type of operation is useful for transit or probe vehicles where the visible light from an emitter may be undesirable. The visible light filter reduces the effective range of the emitter. 3. Emitters The emitter is electrically connected to a 12 volt DC vehicle battery. The emitter converts the vehicle battery voltage to the high voltage DC required to power the xenon flashtube. The timing circuit generates the control signal that determines the emitter flash rate. Three base flash rates are available: 14 Hz for High priority 10 Hz for Low priority 12 Hz for Probe mode An emitter connected to a Model 793R emitter control switch module is switchable between base flash rates. Encoded emitters generate extra pulses between the pulses of the base flash rate. The encoded pulses contain a vehicle class and identification code. Emitters can also generate an automated signal intensity threshold level (range) code. This can be used to set the maximum distance from the intersection at which the phase selector or discriminator will respond to the approaching vehicle. Only Opticom Infrared system equipment can decode an encoded emitter signal to provide the vehicle class/identification code and the range setting threshold information. The emitter has a disable feature that turns off the emitter automatically when a signal is received from an outside source. A typical sources for this signal is the driver s door switch. This signal requires a normally open switch providing vehicle ground (DC return) upon opening the driver s door. Without a disable switch, it is possible for the vehicle operator to park the vehicle at the emergency site and forget to turn off the emitter. Any Opticom Infrared system equipped intersection in front of the vehicle could be under priority control of the parked vehicle. GTT recommends the use of the disable feature. 3-1

8 3. Emitters Opticom Infrared System 3-2. Model 792 Series Emitters A Model 792 series emitter has a A Model 792 series emitter consists of a reflector/flashtube/lens assembly with a built-in power supply, an emitter installation cable, and the appropriate emitter control switch module. The emitter may be surface mounted, recess mounted, or incorporated into the vehicle s lightbar. The emitter has a disable switch option that enables an existing vehicle switch (such as the driver s door switch) to turn off the emitter. Once it is disabled, the emitter remains off until the disable function is deactivated. communication port available by connecting the appropriate interface cable assembly to a PC or modem. You can use the communication port to set all configurable parameters of the emitter via 790 series configuration software (790-CS). Information stored in the emitter is also accessible via the configuration software. It is also possible to communicate with the emitter via the J1708 port to devices such as an transit AVL computer. Figure 3-1 shows a typical emitter installation on a priority vehicle. Figure 3-1. Typical Emitter Installation 3-2

9 Model 792H Emitter This emitter is programmed with a fixed mode of High priority control, and a base flash rate of approximately 14 Hz. It has a clear lens permitting emission of light in both visible and infrared wavelengths. The transmission range is up to 2500 feet (762 meters). Model 792H emitters are intended for use on emergency vehicles. Model 792HF Emitter This emitter is programmed with a fixed mode of High priority control, and a base flash rate of approximately 14 Hz. It has a black (filtered) lens permitting emission of light in only the nonvisible infrared wavelength. The transmission range is up to 1800 feet (549 meters). Model 792HF emitters are intended for use on emergency vehicles. 3. Emitters With a Model 792R emitter, a Model 793R emitter control switch module, and a Model 750 series phase selector, the operating range can be set for both High and Low priority control. A momentaryaction range-setting switch is used to implement the automated signal intensity threshold level adjustment. Refer to the Model 750 series phase selector Installation Instructions for details about setting the operating range. Model 792L Emitter This emitter is programmed with a fixed mode of Low priority control, and a base flash rate of approximately 10 Hz. It has a clear lens permitting emission of light in both visible and infrared wavelengths. The transmission range is up to 2500 feet (762 meters). Model 792L emitters are intended for use on emergency vehicles operating in low priority. Model 792T Emitter This emitter is programmed with a fixed mode of Low priority control, and a base flash rate of approximately 10 Hz. It has a black (filtered) lens permitting emission of light in only the nonvisible infrared wavelength. The transmission range is up to 1800 feet (549 meters). Model 792T emitters are intended for use on transit vehicles. Model 792R Emitter This emitter has three user-selectable base flash rates of approximately 14 Hz for High priority, 10 Hz for Low priority, or 12 Hz for Probe mode. It has a clear lens permitting emission of light in both visible and infrared wavelengths. The transmission range is up to 2500 feet (762 meters). Model 792R emitters are intended for use on maintenance vehicles. 3-3

10 3. Emitters Opticom Infrared System Controls, Indicators, and Wiring Emitter Control Switch Modules The following emitter control switch modules are available for Model 792 series emitters. All of the control modules include diagnostic indicators. Model 793B Emitter Control Switch Module The Model 793B emitter control switch module can be used with Model 792H, HF, L, T, and P emitters. The Model 793B emitter control switch module is a two position, on/off rocker switch with a built-in indicator light. The rocker switch is rated at 24 VDC, 7 ampere, 100,000 actuations. The built-in indicator lamp is rated at 14 VDC. This control switch may be knockout/panel mounted or dash mounted with the simple mounting bracket provided. The rocker switch turns the emitter on or off only. No provision exists with this model to modify the emitter base flash rate. The built-in indicator lamp is used for visual indication of the emitter power on, optional disable mode, and self-diagnostics. Model 793S Emitter Control Switch Module The Model 793S emitter control switch module can be used with Model 792H, HF, L, T, and P emitters. The Model 793S emitter control switch module has an alternate-action, on/off pushbutton switch with a positive latch down in the ON position and a built-in indicator light. A mounting bracket is included to mount the unit under the dashboard. The on/off switch turns the emitter on or off only. No provision exists with this model to modify the emitter base flash rate. The built-in indicator lamp is used for visual indication of the emitter power on, optional disable mode, and self-diagnostics. Model 793R Emitter Control Switch Module The Model 793R emitter control switch module can be used only with a Model 792R emitter, which is intended for use on maintenance vehicles only. The Model 793R emitter control switch module has an alternate-action, push-button on/off switch with a positive latch down in the ON position and a built-in indicator light, a momentary-action range switch, and a threeposition rocker switch. A mounting bracket is included to mount the unit under the dashboard. This emitter control switch module has an Electronic Frequency Control Module (EFCM), which is used to change the emitter High priority flash rate to either the Low priority or the Probe flash rate. With the emitter power on and the threeposition rocker switch set to the center position, the emitter flashes at the High priority flash rate of 14 Hz. Moving the rocker switch to the down position activates the built-in EFCM. The EFCM provides a signal on the disable control line, which switches the emitter to the Low priority flash rate of 10 Hz. Moving the rocker switch to the up position causes the EFCM to provide a signal on the disable control line, which switches the emitter to the Probe flash rate of 12 Hz. With the three-position rocker switch set to the center position for High priority or the down position for Low priority, the momentary-action range switch can be pushed and held for 15 seconds to automatically set the signal intensity threshold level for the selected priority control. Refer to the Model 792R emitter Installation Instructions for details about setting the automated signal intensity threshold level. 3-4

11 3. Emitters Diagnostic Indicators Model 792 series emitters have some diagnostic capabilities. In the event of a failure, the emitter turns off automatically. The built-in indicator lamps show the following conditions: The light is on steady (flickering is normal) when the emitter is on and operating normally. The light flashes every other second (0.5 Hz) when the emitter is disabled by the optional disable switch. The light flashes two times per second (2 Hz) when a fault is detected that turns off the emitter. Note For Model 792 series emitters, additional information (fault types, firmware version, model number, and flash count) is available by using 790 series configuration software (790-CS). Refer to the online Configuration Software Help that comes with the 790 series configuration software. 3-5

12 3. Emitters Opticom Infrared System Disable Switch When activated, the optional disable switch turns off the emitter. The disable switch is typically a vehicle door switch, parking brake switch, or any other switch that would be activated when the emergency vehicle reaches its destination. When activated, the disable switch output is grounded. When deactivated, the disable switch output returns to an open (non-grounded) state. The disable feature is software configurable to Latching mode or Non-latching mode using 790 configuration software (790-CS). The factory default is Latching mode. Latching mode turns the emitter off when the disable switch is activated. The emitter will not turn on until the disable switch is deactivated and the emitter control switch is turned off for approximately 5 seconds and then turned back on. Non-latching mode turns the emitter off when the disable switch is activated and turns it back on when the disable switch is deactivated. Power does not need to be cycled off and back on to turn on the emitter. Vehicle Identification Code Encoded emitters generate extra pulses between the pulses of the base flash rate. The encoded pulses enable the emitter to generate a coded signal that identifies the specific vehicle using the Opticom Infrared system. The vehicle identification code includes a class number (0 9) and an identification number (0 999). The class/identification numbers can be combined to form 10,000 unique vehicle identification codes for each of the three base flash rates; a total of 30,000 codes. The appropriate vehicle class/identification numbers are determined at the time of installation and are programmed by the user via 790 series configuration software (790-CS). Refer to the online Configuration Software Help that comes with the 790 series interface software. Emitter Installation Cable The emitter installation cable is 25 feet long with a molded socket connector on one end. The cable may be cut to length or spliced to meet specific application requirements. The installation cable socket connector mates with a corresponding pin connector attached to the emitter cable. Figure 3-2 shows the cable connector pin view and Figure 3-3 shows the socket view. Figure 3-2. Cable Connector Pin View Figure 3-3. Cable Connector Socket View Table 3-1 lists the pin, wire color, and function for the wires in the emitter installation cable. Table 3-1. Emitter Installation Cable Wiring Pin Wire Color Function 1 Red +12 VDC 2 Orange Range setting enable (input) 3 White Disable (input) 4 Gray Serial communication (B) 5 Green DC return for indicator light 6 Black DC return 7 Blue Serial communication (A) 3-6

13 3. Emitters Specifications Table 3-2. Model 792 Series Emitter Specifications Physical Characteristics Height in (9.4 cm) Width in (14.7 cm) Depth in (8.9 cm) Weight lb (0.86 kg) Electrical Requirements Voltage...10 to 16 volts DC Current, maximum..less than 5 amps DC Environmental Requirements Temperature to +165 F ( 34 to +74 C) Humidity, relative...5% to 95% Operating Characteristics Base flash rate High priority...14.xxxx Hz ± 0.xxxxx Hz Low priority...9.xxxxx Hz ± 0.xxxxx Hz Probe mode...11.xxxx Hz ± 0.xxxxx Hz Transmission range Clear lens ft (762 m) Black lens ft (549 m) Encoding Vehicle class Vehicle ID

14 3. Emitters Opticom Infrared System Fuse (7A, 250V, 312) RED RED +12 VDC Vehicle Battery -DC Return BLK Model 793S Emitter Control Switch Module ON/OFF Switch BATTERY Lamp RED ORN GRN +12 VDC Range In Disable In Serial B DC Lamp Return DC Return RED ORN WHT GRY GRN BLK Model 792H, HF, L, T, P Emitter Power Supply and Pulse Timing Circuit KVDC Flashtube Trigger WHT Disable Switch (Optional) WHT Serial A BLU 7 Emitter Installation Cable KVDC Return Fuse RED/BLK Model 793B Emitter Control Switch Module ON/OFF Switch RED +12 VDC Lamp GRN DC Lamp Return Opticom-413R Figure 3-4. Model 792H, HF, L, T Emitter with Model 793S or B Emitter Control Switch Module Fuse (7A, 250V, 312) RED +12 VDC Vehicle Battery -DC Return Model 793R Emitter Control Switch Module ON/OFF Switch RED BATTERY RED Range Lamp Switch BLK BLK Mode Switch 100 Hz EFC Module 200 Hz ORN GRN WHT +12 VDC Range In Disable In Serial B DC Lamp Return DC Return Serial A RED 1 ORN 2 3 WHT 4 GRY GRN 5 BLK 6 7 BLU Model 792R Emitter Power Supply and Pulse Timing Circuit KVDC Flashtube Trigger KVDC Return BLK WHT Disable Switch (Optional) WHT Emitter Installation Cable Figure 3-5. Model 792R Emitter with Model 793R Emitter Control Switch Module Optitom-411R 3-8

15 3-3. Model 492 Series Emitters Model 492 series emitters consist of a reflector/flashtube/lens assembly with a built-in power supply, an emitter installation cable, and the appropriate emitter control switch module. The emitters may be surface mounted, recess mounted, or incorporated into the vehicle s lightbar. The emitters have a disable switch option that enables an existing vehicle switch (such as the driver s door switch) to turn off the emitter. Once it is disabled, the emitter remains off until the disable function is deactivated. Model 492H Emitter This emitter is programmed with a fixed mode of High priority control, and a base flash rate of approximately 14 Hz. It has a clear lens permitting emission of light in both visible and infrared wavelengths. The transmission range is up to 2500 feet (762 meters). Model 492H emitters are intended for use on emergency vehicles. Model 492HF Emitter This emitter is programmed with a fixed mode of High priority control, and a base flash rate of approximately 14 Hz. It has a black (filtered) lens permitting emission of light in only the nonvisible infrared wavelength. The transmission range is up to 1800 feet (549 meters). Model 492HF emitters are intended for use on emergency vehicles Controls, Indicators, and Wiring Emitter Control Switch Modules Two emitter control switch modules are available for Model 492 series emitters. Both switch modules include diagnostic indicators. 3. Emitters Model 793B Emitter Control Switch Module The Model 793B emitter control switch module is a two position, on/off rocker switch with a built-in indicator light. The rocker switch is rated at 24 VDC, 7 ampere, 100,000 actuations. The built-in indicator lamp is rated at 14 VDC. This control switch may be knockout/panel mounted or dash mounted with the simple mounting bracket provided. The built-in indicator lamp is used for visual indication of the emitter power on, optional disable mode, and self-diagnostics. Model 793S Emitter Control Switch Module The Model 793S emitter control switch module has an alternate-action, on/off pushbutton switch with a positive latch down in the ON position and a built-in indicator light. A mounting bracket is included to mount the unit under the dashboard. The built-in indicator lamp is used for visual indication of the emitter power on, optional disable mode, and self-diagnostics. Diagnostic Indicators Model 492 series emitters have some diagnostic capabilities. In the event of a failure, the emitter turns off automatically. The built-in indicator lamps show the following conditions: The light is on steady (flickering is normal) when the emitter is on and operating normally. The light flashes every other second (0.5 Hz) when the emitter is disabled by the optional disable switch. The light flashes two times per second (2 Hz) when a fault is detected that turns off the emitter. 3-9

16 3. Emitters Opticom Infrared System Disable Switch When activated, the optional disable switch turns off the emitter. The disable switch is typically a vehicle door switch, or any other switch that would be activated when the emergency vehicle reaches its destination. When activated, the disable switch output is grounded. When deactivated, the disable switch output returns to an open (non-grounded) state. The disable mode is factory set to Latching mode and is not changeable Emitter Installation Cable The emitter installation cable is 25 feet long with a molded socket connector on one end. The cable may be cut to length or spliced to meet specific application requirements. The installation cable socket connector mates with a corresponding pin connector attached to the emitter cable. Figure 3-7 shows the cable connector pin view and Figure 3-8 shows the socket view. Latching mode turns the emitter off when the disable switch is activated. The emitter will not turn on until the disable switch is deactivated and the emitter control switch is turned off for approximately 5 seconds and then turned back on. Vehicle Identification Code Encoded emitters generate extra pulses between the pulses of the base flash rate. The encoded pulses enable the emitter to generate a coded signal that identifies the specific vehicle class using the Opticom Infrared system. The encoded signal pattern generated by the emitter is established prior to ordering the emitter and is specified at the time of procurement. Vehicle class selection (0 9) is factory set during the manufacturing process. Vehicle ID is not selectable and is factory set to 1. Figure 3-7. Cable Connector Pin View Figure 3-8. Cable Connector Socket View Table 3-3 lists the pin, wire color, and function for the wires in the emitter installation cable. Table 3-3. Emitter Installation Cable Wiring Pin Wire Color Function 1 Red +12 VDC 2 Orange Range setting enable (input) 3 White Disable (input) 4 Gray Not used 5 Green DC return for indicator light 6 Black DC return 7 Blue Not used 3-10

17 3. Emitters Specifications Table 3-4. Model 492 Series Emitter Specifications Physical Characteristics Height in (9.4 cm) Width in (14.7 cm) Depth in (8.9 cm) Weight lb (0.86 kg) Electrical Requirements Voltage...10 to 16 volts DC Current, maximum..less than 5 amps DC Environmental Requirements Temperature to +165 F ( 34 to +74 C) Humidity, relative...5% to 95% Operating Characteristics Base flash rate High priority...14.xxxxx Hz ± 0.xxxxx Hz Low priority...9.xxxxx Hz ± 0.xxxxx Hz Transmission range Clear lens ft (762 m) Black lens ft (549 m) Encoding Vehicle class (factory set) Vehicle ID...1 (factory default) 3-11

18 3. Emitters Opticom Infrared System Block Diagram The Model 492 series emitters consists of a reflector/flashtube/ lens assembly, an integrated power supply, and a pulse timing circuit. An emitter installation cable connects the emitter to an emitter control switch module, which is electrically connected to a 12 volt DC vehicle battery. Fuse (7A, 250V, 312) RED RED +12 VDC Vehicle Battery -DC Return BLK Model 793S Emitter Control Switch Module ON/OFF Switch BATTERY Lamp RED ORN GRN +12 VDC Not Used Disable In Not Used DC Lamp Return DC Return RED 1 2 ORN 3 WHT GRY 4 5 GRN BLK 6 Model 492H, HF, L, T Emitter Power Supply and Pulse Timing Circuit KVDC Flashtube Trigger WHT Disable Switch (Optional) WHT Not Used BLU 7 Emitter Installation Cable KVDC Return Fuse RED/BLK Model 793B Emitter Control Switch Module ON/OFF Switch RED +12 VDC Lamp GRN DC Lamp Return Opticom-443R Figure 3-9. Model 492H, HF Emitter with Model 793S or B Emitter Control Switch Module 3-12

19 4. Detectors 4. Detectors 4-1. Overview Detectors are typically mounted at or near the intersection. The detector senses emitter pulses and converts them from infrared energy to electrical signals that are transmitted by the detector cable to a phase selector or discriminator in the traffic controller cabinet. Since detectors are line of sight devices, they must be mounted and aimed so they have an unobstructed view of the approach to the intersection. If there are obstructions that cannot be removed, mount the detector in an alternate location or mount additional detectors. Detectors can be mounted upright on mast arms, signal head framework, pedestals, or other appropriate locations in line of sight of controlled intersections. They can also be inverted and suspended from a span wire over the intersection. Weep holes are provided to drain moisture from the detector. The appropriate weep holes must be opened by the installer. Additionally, drip loops must be included in the detector cable whenever the cable is exposed Detector Features Transient voltage protection Modular design Detection cone angle of 8 degrees Adjustable turret configuration which accommodates aiming for skewed or slightly curved approaches and wide approaches with multiple lanes Weather-resistant enclosure is lightweight, durable, high impact polycarbonate construction Gray cover on Model 722 detector provides aid to distinguish between Model 722 and 721 detectors from street level. 4-1

20 4. Detectors Opticom Infrared System Configuring Detectors Detectors can be configured for either upright or inverted mounting by simply rotating the tube shells. Figure 4-1 shows how to convert a detector for inverted mounting. CAUTION Before installing a detector, be sure there are no obstructions limiting the view of the detector. If there are obstructions that cannot be removed, choose an alternate installation location. CAUTION Before installing a detector, punch out the correct weep holes. Failure to punch out the correct weep holes may result in failure of the detector. CAUTION The detector has internal stops to prevent rotation of the tube assemblies in excess of 360 degrees. Do not force the tube assemblies past these stops. Forcing the tube assemblies may result in severe damage to the detector. CAUTION Forcing the detector into a tightened position by rotating the detector body may severely damage it. Secure the detector in place by tightening the mounting hardware only. WARNING Connecting more than one detector signal wire to a detector input terminal may damage the detectors and may cause improper operation of the input circuitry, which may result in accidents and/or injuries. To avoid this problem, connect only one detector signal wire to each detector input terminal. Improper operation of the traffic control system may result in unsafe driver action. A. Shells configured for upright pedestal or mast arm mounting. B. By hand, rotate tube shells 180 degrees. C. Shells configured for inverted span wire mounting. Figure 4-1. Tube Rotation for Upright or Inverted Mounting 4-2 Copyright 2000, 3M IPC. All rights reserved.

21 4. Detectors Detector Reception Angle The detector reception angle varies with distance. At a distance of 2500 feet (762 meters), the reception angle is approximately 8 degrees. Due to internal detector reflections, the reception angle increases at close range. Figure 4-2 shows a typical upright detector installation on a pedestal and on a mast arm. Figure 4-2. Upright Detector Pedestal/Mast Arm Installation 4-3

22 4. Detectors Opticom Infrared System Detection Coverage Detectors have a conical detection angle of approximately 8 degrees. The approximate width of the detection area can be calculated with the following formula: x n = Width of detection area Where n is the distance (in feet) away from the detector. This formula can be used to determine if the particular mounting location provides the detection coverage expected. The detection angle may appear to be greater than 8 degrees near the detector. This is because of reflections that occur within the detector at close range, which is beneficial. These reflections augment the detection range near the intersection, but they do not cause adjacent intersection detection. Table 4-1 and Figure 4-3 show some typical widths of the detection area versus distances from the detector. Table 4-1. Detection Width Versus Distance Distance from Detector (Feet) Approximate Width of Detection Area (Feet)

23 4. Detectors Figure 4-3. Detection Width Versus Distance 4-5

24 4. Detectors Opticom Infrared System 4-2. Model 700 Series Detectors The Model 700 series detectors are available in the following three models Model 711 Detector The Model 711 detector (Figure 4-4) is a singleinput, single-output unit. It is used when a detector controls a single narrow approach to an intersection. The Model 711 detector is also an ideal auxiliary or advance detector. A typical Model 711 detector application is shown in Figure 4-5. Figure 4-4. Model 711 Detector Figure Phase, 4-Channel Application Using Model 711 Detectors 4-6

25 Model 721 Detector The Model 721 detector (Figure 4-6) is a dualinput, single-output unit. It is used to control single approaches on wide roads with multiple lanes. This is done by rotating the turrets so they are both facing the same approach, but at slightly different angles as shown in Figure 4-7. A 721 detector is recommended for most applications 4. Detectors The Model 721 detector may also used when two approaches to the intersection will be controlled together. For this application, the detector must be mounted so that it receives signals from both approaches as shown in Figure 4-8. However coverage of one of the approaches may be reduced. Figure 4-6. Model 721 Detector Figure Phase, 4-Channel Application Using Model 721 Detectors 4-7

26 4. Detectors Opticom Infrared System Figure Phase, 2-Channel Application Using Model 721 Detectors 4-8

27 4. Detectors Model 722 Detector The Model 722 detector (Figure 4-9) is a dual-input, dual-output unit. It is used when two approaches to the intersection will be controlled independently. For this application, the detector must be mounted so that it receives signals from both approaches as shown in Figure However coverage of one of the approaches may be reduced. Figure 4-9. Model 722 Detector Figure Phase, 4-Channel Application Using Model 722 Detectors 4-9

28 4. Detectors Opticom Infrared System 4-3. Operational Description A Model 700 series detector converts the infrared pulses from an emitter into electrical signals and transmits these signals via the detector cable to a phase selector or discriminator in the traffic controller cabinet. The detector consists of a photo detector, amplifier and signal conditioner, level shifter and clipper, and a regulated power supply, all in a weather-resistant enclosure. The photo detector picks up the infrared pulses from the emitter. The amplifier and signal conditioner shapes the photo detector output into a signal the level shifter and clipper can recognize. The level shifter and clipper convert this signal into a series of pulses that represent the intensity of the emitted signal. The regulated power supply receives +24 VDC from the phase selector/discriminator and outputs +15 VDC and +7.5 VDC Specifications Table 4-2. Model 700 Series Detector Specifications Physical Characteristics Model 711 Detector Height in (14.3 cm) Width in (12.1 cm) Length in (30.5 cm) Weight lb (400 g) Model 721/722 Detector Height in (18.1 cm) Width in (12.1 cm) Length in (30.5 cm) Weight lb (508 g) Electrical Requirements Input voltage to 28 volts DC Current source milliamperes minimum Environmental Requirements Temperature to +165 F ( 34 to +74 C) Humidity, relative... 5% to 95% Interface Built-in terminal block... Requires use of spade lugs Cable routing... Side entry through metal cap and rubber plug, or base entry through treaded mount Operating Characteristics Detection angle... 8 in both horizontal and vertical planes Reception range ft (61 m), adjustable up to 2500 ft (762 m) under clear atmospheric conditions 4-10

29 4. Detectors 4-5. Block Diagrams Model 711 Detector The Model 711 detector (Figure 4-11) consists of a single photo detector, a signal conditioner, and a regulated power supply. It is a single-input, single-output device. Figure Model 711 Detector with Model 138 Detector Cable Block Diagram 4-11

30 4. Detectors Opticom Infrared System Model 721 Detector The Model 721 detector (Figure 4-12) consists of two photo detectors, a signal conditioner, and a regulated power supply. Since the photo detectors can sense emitter outputs independently but feed the same signal conditioner, the Model 721 detector is a dualinput, single-output device Figure Model 721 Detector with Model 138 Detector Cable Block Diagram

31 4. Detectors Model 722 Detector The Model 722 detector (Figure 4-13) consists of two independent units, each having a photo detector, signal conditioner, and regulated power supply. It is electrically equivalent to two Model 711 detectors in a single housing. The Model 722 detector is a dual-input, dual-output device. Figure Model 722 Detector with Model 138 Detector Cable Block Diagram 4-13

32 5. Phase Selectors/Discriminators 5-1. Overview Model 750 series phase selectors and Model 450 discriminators perform discrimination and arbitration functions. Discrimination is the ability of a phase selector/discriminator to differentiate between a valid emitter signal and other sources of energy. Arbitration is the ability to treat same priority inputs on a first-come, first-served basis, and to override an Low priority input when a High priority input is received. The circuitry arbitrates between channels with conflicting requests for priority. Once discrimination and arbitration are complete, the phase selector/discriminator sends a signal to the traffic controller. This signal requests the traffic controller to sequence to the desired green phase for the approaching priority vehicle. The duration of the signal sent to the controller is equal to the duration of the emitter signal received plus a selectable extension time. Model 750 series phase selectors are capable of decoding encoded emitter signals and creating and storing information about the activity of the vehicle (for example, vehicle location, travel direction, user class and identification). There are ten vehicle class codes and each class has 1000 vehicle identification numbers. If a call is received from a non-encoded emitter, it is logged with a zero vehicle class and zero ID. All other call information is retained. The phase selector can be programmed to reject any encoded or nonencoded emitter, based on the vehicle class and ID numbers. Model 750 series phase selectors can also provide Probe vehicle information by logging the movement of designated Probe vehicles. The phase selector places information about calls it has received into a history log. The history log is stored in non-volatile memory. 5. Phase Selectors/Discriminators Model 750 series phase selectors have a communication port that allows remote communication through the use of a personal computer or modem. Complete instructions for using these remote communication capabilities are in the 750 series configuration software (750-CS) On-Line Help. Model 752/754 phase selectors and Model 452/454 discriminators are designed for use with California/New York Type 170 traffic controllers, and may be installed directly into the input files. Some controllers require the installation of a system chassis or card rack to house a phase selector/ discriminator and facilitate connection of the device to the traffic controller. The input file/card rack provides the power and logic wiring for the phase selector/discriminator. Model 752/754 phase selectors and Model 452/454 discriminators work directly with NEMA 1 traffic controllers and virtually any other traffic controller that can acknowledge external priority control signals. Model 752N/754N phase selectors perform all the functions of Model 752/754 phase selectors plus they send additional control signals to the traffic controller to provide the sequence to the desired green phase for the approaching priority vehicle. Model 752N/754N phase selectors are used with NEMA traffic controllers that do not incorporate internal preemption algorithms. They are also used with traffic controllers that do not recognize the 6.25 Hz pulsed low priority control inputs. Other special modes of operation are available with the 752N/754N. Contact GTT Technical Service at for more details. 1 National Electrical Manufacturer s Association 5-1

33 5. Phase Selectors/Discriminators Opticom Infrared System 5-2. Model 750 Series Phase Selectors Controls, Indicators, Connectors, and Wiring Controls Model 752/754 Phase Selectors The Model 752 phase selector is a two-channel, dual-priority, encoded-signal device (Figure 5-1). The Model 754 phase selector is a four-channel, dual-priority, encoded-signal device (Figure 5-2). The phase selector front panel contains switches for turning on the phase selector and generating test signals. These switches can also be used to reset all configurable parameters to their factory settings, set each channel s maximum detection range, initiate diagnostics, and activate password override mode. The front panel also has indicators for observing module operation, and connectors for auxiliary functions. Figure 5-2. Model 754 Phase Selector 5-2 Figure 5-1. Model 752 Phase Selector Model 752N/754N Phase Selectors The main difference between Model 752N/754N phase selectors and Model 752/754 phase selectors is that Model 752N/754N phase selectors are used with NEMA traffic controllers that do not incorporate internal preemption algorithms. They are also used with traffic controllers that do not recognize the 6.25 Hz pulsed low priority control inputs. Other special modes of operation are available with the 752N/754N. Contact 3M Technical Service at ext 1 for more details. The Model 752N phase selector is a twochannel, dual-priority, encoded-signal device (Figure 5-3). Its front panel switches and indicators are the same as those on the Model 752 phase selector. The Model 754N phase selector is a fourchannel, dual-priority, encoded-signal device (Figure 5-4). Its front panel switches and indicators are the same as those on the Model 754 phase selector.

34 5. Phase Selectors/Discriminators Figure 5-3. Model 752N Phase Selector Figure 5-4. Model 754N Phase Selector Power Switch The power switch is a two-position toggle switch that turns the phase selector on and off. Test Initiate Switch The test initiate switch is a three-position, momentary-contact toggle switch. In the center position, the switch is off. The test initiate switch is used in conjunction with the function select push-wheel switch to perform the functions shown in Table

35 5. Phase Selectors/Discriminators Opticom Infrared System Function Select Push-Wheel Switch The function select push-wheel switch is an 8-position switch for Model 752/752N phase selectors, and a 10-position switch for Model 754/754N phase selectors. The switch works in conjunction with the test initiate switch to perform the functions shown in Table 5-1. Table 5-1. Model 750 Series Phase Selector Push-Wheel Switch Functions Switch Position Function A, B, C, D Priority Control Output Test Activates the output for the selected channel and priority. Select the desired channel via the push-wheel switch (A, B, C, or D), then push and hold the test initiate switch to the desired priority (H or L). The selected channel and priority output are active while the test initiate switch is held, and remain active for 6 seconds after releasing the switch. E Emitter Loopback Test Verifies the communication link between a phase selector and a Model 792 series emitter. Connect the phase selector s front communication port to the emitter using the appropriate connectors and adapters. Set the push-wheel switch to the E position, then push and hold the test initiate switch to the desired priority (H or L). Activate the test by releasing the test initiate switch. A successful emitter loopback test is indicated by the channel A high priority indicator flashing at a 2 Hz rate for 2 seconds. F Detector Function Test Verifies proper operation of the Model 700 series detector connected to each channel. Set the push-wheel switch to the F position, then push and hold the test initiate switch to the desired priority (H or L). Activate the test by releasing the test initiate switch. Each channel with a detector(s), which passes the test, is indicated by the associated high priority indicator flashing at a 2 Hz rate for 2 seconds. P Password Override Activates password override mode. Set the push-wheel switch to the P position, then push and hold the test initiate switch to the desired priority (H or L). Activate the password override mode by releasing the test initiate switch. The password override mode remains active for 1 hour after releasing the test initiate switch, or until the phase selector is reset. R Reset Parameters to Default Resets all configurable parameters for the phase selector to their factory settings. Set the push-wheel switch to the R position, then hold the test initiate switch in either the H or L position while cycling the power off then on. The test initiate switch must be held for a minimum of 2 seconds following power up to initiate the reset to default action. S Set Channel and Priority Range Sets the priority range for each channel. This function requires the presence of a valid priority signal on the desired channel(s). Set the push-wheel switch to the S position, then hold the test initiate switch in either the H or L position while cycling the power off then on. The test initiate switch must be held for a minimum of 6 seconds following power up to initiate the range setting function. When you release the test initiate switch, the current signal intensity is the range value stored. blank Not used. 5-4

36 5. Phase Selectors/Discriminators Default Configuration When a Model 750 series phase selector is reset to its default configuration, the history log, internal registers, and programmable fields are set to the following values: History Log: No effect. High Primary Detector Range: Set to 300. High Auxiliary Detector Range: Set to 300. Low Primary Detector Range: Set to Low Auxiliary Detector Range: Set to High Priority Codes: Set all codes valid. Low Priority Codes: Set all codes valid. Maximum Call Time: All channels High and Low set to seconds (18.2 hours) in v1.3 & 1.4 firmware. Set to 360 seconds in V2.08 and higher firmware Call Hold Time: All channels High and Low set to 6 seconds. Call Delay Time: All channels High and Low set to 0 seconds. Desired Greens: All channels cleared. Gated Advantage: Disabled. Additional Green Time: All channels set to 254 seconds. Lead End of Green Time: All channels set to 255 seconds. Clearance Time: All channels set to 6 seconds. Intersection Name: Cleared. Indicators POWER LED The POWER LED is a green LED that lights when the power switch is set to ON and power is applied to the phase selector. The LED flashes to indicate EEPROM or microprocessor faults. HIGH LEDs The HIGH LEDs are yellow LEDs, one for each channel, that light when a Command (high) priority call is active in a channel. LOW LEDs The LOW LEDs are yellow LEDs, one for each channel, that light when an Advantage (low) priority call is active in a channel. Channel names: Cleared Limit Low Priority Calls: All calls allowed Relative Priorities: All High Priorities equal, all Low priorities equal 5-5

37 5. Phase Selectors/Discriminators Opticom Infrared System Edge Connectors The edge connector is a 44-pin STD connector that provides all electrical connections to the phase selector except for auxiliary detector inputs, green signal sensing, confirmation light outputs, and NEMA control signal outputs and priority outputs. Table 5-2. Model 752/752N Phase Selector Edge Connector Wiring Pin Function A Detector ground D Channel A primary detector input E Detector 24 VDC power output F Channel A priority output, collector (+) H Channel A priority output, emitter ( ) J Channel B primary detector input K Detector ground L Earth ground M AC in (AC return) N AC+ in (115 VAC) R Detector 24 VDC power output V Detector ground W Channel B priority output, collector (+) X Channel B priority output, emitter ( ) 19 TXD (transmit data) 21 RXD (receive data) Table 5-3. Model 754/754N Phase Selector Edge Connector Wiring Pin Function A Detector ground D Channel A primary detector input E Detector 24 VDC power output F Channel A priority output, collector (+) H Channel A priority output, emitter ( ) J Channel B primary detector input K Detector ground L Earth ground M AC in (AC return) N AC+ in (115 VAC) P Channel C primary detector input R Detector 24 VDC power output S Channel C priority output, collector (+) T Channel C priority output, emitter ( ) U Channel D primary detector input V Detector ground W Channel B priority output, collector (+) X Channel B priority output, emitter ( ) Y Channel D priority output, collector (+) Z Channel D priority output, emitter ( ) 19 TXD (transmit data) 21 RXD (receive data) Figure 5-5. Phase Selector/Discriminator Edge Connector Pin Letters and Numbers 5-6