Question

What is the output voltage of the KNX power supply unit in a minimal TP installation?

KNX BasicLearnSystem OverviewEasy
Answer

D — 30 V DC

Correct: The KNX power supply unit outputs 30 V DC onto the TP bus.

Source

KNX Basic Course Documentation — 2 — p. 29

All proposed choices (exam context)
  1. A.24 V DC
  2. B.230 V AC
  3. C.12 V DC
  4. D.30 V DC
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Last updated: 19 May 2026

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