Question
Why were segment couplers needed for adding a few RF devices to a TP installation, especially an existing one?
Answer
C — Previously the media coupler had to be installed in the main line, but a single-line installation (e.g. 1.1) has no main line - so a way to branch a TP line off for RF devices was needed.
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An error or unclear wording? Report this questionAll proposed choices (exam context)
- A.RF devices cannot coexist with TP devices under any circumstances.
- B.RF devices require their own area with its own backbone coupler.
- C.Previously the media coupler had to be installed in the main line, but a single-line installation (e.g. 1.1) has no main line - so a way to branch a TP line off for RF devices was needed.✓
- D.The routing counter must be reset for RF telegrams.
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