Question

On which DIN rails may KNX TP DIN-rail mounted devices be installed in a distribution board?

KNX BasicLearnKNX InstallationMedium
Answer

A — Standardized EN 50022 35x7.5 mm DIN rails

Correct: Any commercial board with EN 50022 35x7.5 mm DIN rails may be used.

Source

KNX Basic Course Documentation — 4 — p. 101

All proposed choices (exam context)
  1. A.Standardized EN 50022 35x7.5 mm DIN rails
  2. B.Only proprietary KNX rails supplied by the manufacturer
  3. C.EN 50090 15x5 mm rails
  4. D.Only earthed metal rails used as the SELV return
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Last updated: 19 May 2026

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