Question
In KNX symmetrical transmission, how are the two signal wires referenced to potential?
Answer
B — Neither wire is connected to ground/PE or to any fixed potential
Correct: The source states neither wire is connected to ground/PE nor to a fixed potential.
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An error or unclear wording? Report this questionAll proposed choices (exam context)
- A.One wire carries the signal and the other is connected to PE (ground)
- B.Neither wire is connected to ground/PE or to any fixed potential✓
- C.Both wires are tied to a fixed reference potential
- D.The black wire is grounded and the red wire carries the signal
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