In a NEMA TS1 cabinet, which connector carries the load-switch driver outputs from the controller to the back panel?
Imsa Signal Bench Tech Ii Cabinet Wiring
Question · Easy
What is the fundamental wiring difference between a NEMA TS1 cabinet and a NEMA TS2 Type 1 cabinet?
A NEMA TS2 Type 2 cabinet is most accurately described as:
Question · Medium
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On a NEMA load switch, which output triggers when the controller energizes the green driver pin?
What component in a NEMA cabinet provides the AC-line isolation point and is required to remove all 120 VAC field output power for safe bench work on the back panel?
Which color is conventionally used for the AC equipment grounding conductor inside a NEMA traffic signal cabinet?
On a TS2 Type 1 cabinet, what is the role of the Bus Interface Unit (BIU) in the detector rack?
Which TS2 SDLC bus carries the controller-to-MMU and detector-rack data traffic?
A flash transfer relay in a NEMA cabinet is energized when:
In TS1 cabinet wiring, which pin function on the MS-B connector lets the controller force the cabinet into flash mode for diagnostic testing?
Question · Hard
On the back panel of a typical eight-phase NEMA cabinet, how many vehicle load switches are usually installed for through and protected-left phases (excluding overlaps)?
When wiring a flashing yellow arrow (FYA) overlap, the protected-left green and the FYA permissive yellow are typically driven by:
On a TS2 cabinet, what is the function of the SDLC Port 1 transient/termination panel (commonly called the bus terminator)?
In an ITS Cabinet (Caltrans 332/ITS Cabinet v2) hosting a 2070, the role of the CMU/SIU compared to a NEMA TS2 MMU is:
Which TS2 cabinet device generates the 60 flashes-per-minute (FPM) signal used by the cabinet's flash transfer relays during flash operation?
Which condition is most likely if a NEMA load switch has a stuck-on green output even when the controller is calling red?
What is the maximum normal AC line-input voltage range a properly fused NEMA cabinet's signal bus is designed to operate within?
Which NEMA cabinet term refers to the wire bundle that goes from the back-panel field terminals out to the signal heads, loops, and pedestrian pushbuttons?
What advantage of the Model 2070 controller over the Model 170 controller is most relevant for a bench technician evaluating cabinet upgrades?
Imsa Signal Bench Tech Ii Controllers
Which standard formally defines the Advanced Transportation Controller (ATC) platform that 2070 ATC and modern NEMA controllers comply with?
A traditional Type 170 controller most commonly runs which controller application program?
A 2070 controller typically uses which CPU module to host the application program?
Which 2070 input/output module is the field-output module that interfaces the controller to the cabinet load switches in a Caltrans 332 cabinet?
When loading new firmware on a 2070-ATC controller, which interface is most commonly used in modern field practice?
A 2070-ATC must report the time of day to the controller application. Which clock source is most commonly used for synchronization in a coordinated system today?
Time-of-day (TOD) scheduling on a coordinated controller is used to:
Which coordination parameter directly controls where the green band of a phase begins relative to the system master clock?
If two adjacent coordinated intersections must hold the same cycle length but different splits, which two coordination parameters must agree between them for proper progression?
On a coordinated controller, what does a 'permissive period' represent?
Which 2070-ATC software environment standardizes APIs so a single application can run on multiple vendors' 2070 hardware?
Which controller object dictionary does NTCIP 1202 define for traffic signal controllers?
Which option best describes a 'free' mode of operation on a coordinated controller?
When a 2070 reports a 'Loss of Comm to Master' on the front panel during coordination, the local controller typically:
Which 2070 module function is most commonly diagnosed by checking the front-panel LCD/keypad and built-in self-test?
When swapping a failed 2070 for a known-good spare on the bench, which step is critical before placing the spare into field service?
Which controller feature lets an agency upload coordination plans, splits, and offsets to many intersections at once?
Which type of MMU programming card is required for FYA channel pairing on most modern MMUs?
Imsa Signal Bench Tech Ii Mmu Cmu
How many channels does a Type 16 NEMA MMU monitor?
What is the MMU's response when it detects a conflicting green output on two channels that the program card defines as a permissive conflict?
Which MMU fault category does the RED ENABLE input gate?
The MMU minimum yellow change interval check, when enabled, will trigger flash if a measured yellow is less than:
Which MMU programming-card field defines which channels are allowed to display green at the same time without triggering a conflict fault?
What is the typical state of the MMU's EXTERNAL WATCHDOG input during normal cabinet operation?
When testing a Type 16 MMU on the bench, the recommended way to verify a programmed conflict pair is to:
An EDI MMU-16E displays a 'PORT 1 FAULT' indication. The most likely root cause in a TS2 Type 1 cabinet is:
Which MMU/CMU feature ensures that when a green output for one channel turns off, an acceptable yellow change followed by red clearance occurs before another conflicting green turns on?
What is the safest practice after replacing a failed MMU in a cabinet?
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