Question
What does a KNX TP bus device actually evaluate on the wire pair?
Answer
C — Only the difference of the AC voltage between the two wires
Correct: The bus device evaluates only the difference of the AC voltage between the two wires.
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An error or unclear wording? Report this questionAll proposed choices (exam context)
- A.The absolute voltage of each wire measured against ground
- B.The DC supply voltage level only
- C.Only the difference of the AC voltage between the two wires✓
- D.The sum of the voltages on both wires
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