Practice question
An EDI MMU-16E displays a 'PORT 1 FAULT' indication. The most likely root cause in a TS2 Type 1 cabinet is:
- Loss of SDLC frames from the controller or detector rack on Port 1
- Loss of AC line voltage
- An open field neutral
- A failed pedestrian pushbutton
Answer: A — Loss of SDLC frames from the controller or detector rack on Port 1
The correct answer is shown above. Try the full quiz for additional practice.
Practice more: IMSA Bench Tech II Practice Questions - IMSA Traffic Signal Bench Technician Level II Certification Exam →