Question
What additional role can the spare wire pair of the KNX bus cable serve?
Answer
B — Providing ancillary (additional) power to bus devices
Correct: The source states the spare wire pair can provide ancillary power to bus devices.
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An error or unclear wording? Report this questionAll proposed choices (exam context)
- A.Carrying 230 V mains to the actuators
- B.Providing ancillary (additional) power to bus devices✓
- C.Doubling the telegram transmission speed
- D.Acting as a protective earth
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