Question

Which statement about the KNX serial number is correct?

KNX BasicLearnKNX RFMedium
Answer

A — It is a unique identifier programmed during manufacturing, is not modifiable, and is stored in the receiver as the source address

Correct: the serial number is factory-programmed, unmodifiable, sent in every telegram and stored as the transmitter's source address.

Source

KNX Basic Course Documentation — 3.4 — p. 147

All proposed choices (exam context)
  1. A.It is a unique identifier programmed during manufacturing, is not modifiable, and is stored in the receiver as the source address
  2. B.It is assigned by the installer with ETS during commissioning
  3. C.It changes each time the device transmits
  4. D.It is only used inside one installation and cannot distinguish neighbouring installations
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Last updated: 19 May 2026

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