Question

In the first data block, which identifier is sent after the control field for an RF S-Mode device?

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Answer

D — The domain address

Correct: for RF S-Mode devices a domain address is sent after the control field (E-Mode devices send the serial number).

Source

KNX Basic Course Documentation — 3.4 — p. 148

All proposed choices (exam context)
  1. A.The group address
  2. B.The KNX serial number
  3. C.The individual (physical) address
  4. D.The domain address
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Last updated: 19 May 2026

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