Question

A device carries the individual address 1.1.0. What does the device number 0 tell you?

KNX BasicLearnKNX TopologyMedium
Answer

A — It is the line coupler of that line (x.y.0 addresses the line coupler).

Correct: page 68 - B = 0 addresses the line coupler in the respective line; 1.1.0 is the line coupler of line 1 in area 1.

Source

KNX Basic Course Documentation — 3.5 — p. 68

All proposed choices (exam context)
  1. A.It is the line coupler of that line (x.y.0 addresses the line coupler).
  2. B.It is the first ordinary bus device on the line.
  3. C.It is an unloaded device still at its factory default.
  4. D.It is the backbone coupler of the area.
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Last updated: 19 May 2026

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