Question
In an installation with several lines, how is power supplied to the lines?
Answer
C — Each line and each line segment has its own power supply unit and choke.
Correct: page 73 - each line and each line segment must have its own power supply unit and choke.
Source
KNX Basic Course Documentation — 3.9 — p. 73
All proposed choices (exam context)
- A.One central power supply feeds all lines through the couplers.
- B.Only the main line needs a power supply; secondary lines draw from it.
- C.Each line and each line segment has its own power supply unit and choke.✓
- D.A power supply is needed per area, shared by its lines.
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