Question

On the standardized KNX TP bus connector, which statement about the two parts is correct?

KNX BasicLearnKNX InstallationMedium
Answer

B — The plus part is red and the minus part is dark grey.

Correct: the connector consists of the plus part (red) and the minus part (dark grey).

Source

KNX Basic Course Documentation — 10 — p. 110

All proposed choices (exam context)
  1. A.The plus part is red and the minus part is black.
  2. B.The plus part is red and the minus part is dark grey.
  3. C.The plus part is black and the minus part is red.
  4. D.Both parts are green, matching the bus cable sheath.
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Last updated: 19 May 2026

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