Question
What is the advantage of supplying a coupler from the primary line rather than the secondary line?
Answer
C — The coupler can report a power failure of the secondary line.
Correct: if supplied by the primary line, the coupler can report a secondary line power failure.
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An error or unclear wording? Report this questionAll proposed choices (exam context)
- A.It doubles the number of devices allowed on the secondary line.
- B.It removes the need for a choke on the secondary line.
- C.The coupler can report a power failure of the secondary line.✓
- D.It lets the coupler work without a controller.
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