Question
What is the maximum number of lines that a KNX TP area may contain?
Answer
B — 15
A KNX TP area may contain up to 15 subordinate lines, each connected to the area's main line through its own line coupler. Choice A (12) is simply too low. Choice C (16) is the classical trap: it confuses the count of subordinate lines with the total when the main line itself is included. Choice D (32) corresponds to no defined KNX topology limit.
Preparation tip
Remember the mnemonic 15 + main line — counting the main line as a 16th is the single most common error here.
All proposed choices (exam context)
- A.12
- B.15✓
- C.16
- D.32
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