Question

Which pairing of date range and ideal bus devices per floor is correct?

KNX BasicLearnKNX TopologyMedium
Answer

B — Prior to 2018: 64 per floor; from 2019: 256 per floor.

Correct: The ideal figures are 64 per floor prior to 2018 and 256 per floor from 2019.

Source

KNX Basic Course Documentation — 3.15 — p. 80

All proposed choices (exam context)
  1. A.Prior to 2018: 256 per floor; from 2019: 64 per floor.
  2. B.Prior to 2018: 64 per floor; from 2019: 256 per floor.
  3. C.Prior to 2018: 64 per floor; from 2019: 128 per floor.
  4. D.Prior to 2018: 255 per floor; from 2019: 255 per floor.
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Last updated: 19 May 2026

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