Question
How is a KNX TP line supplied with bus voltage?
Answer
D — Each line needs its own power supply unit
Source
KNX Basic Course Documentation — 5.1 — p. 102
All proposed choices (exam context)
- A.One PSU in the installation supplies every line through the couplers
- B.Bus devices are powered directly from the 230 V mains
- C.No PSU is needed if fewer than 21 devices are used
- D.Each line needs its own power supply unit✓
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