Question

How are the bus coupling unit and application module usually arranged in a DIN rail-mounted KNX device?

KNX BasicLearnKNX Bus DevicesMedium
Answer

A — Inseparably connected together in one housing

Correct: The text states DIN rail-mounted devices usually integrate the BCU and AM inseparably in one housing.

Source

KNX Basic Course Documentation — 1.1 — p. 124

All proposed choices (exam context)
  1. A.Inseparably connected together in one housing
  2. B.Always separated and joined through an external PEI
  3. C.As two DIN modules from different manufacturers
  4. D.Connected only by the KNX bus cable
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Last updated: 19 May 2026

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