Question
On a KNX power supply unit, what does a YELLOW LED indicate?
Answer
D — An external voltage higher than 30 V has been applied to the bus side
Correct: Yellow indicates an external voltage above 30 V on the bus side.
Source
KNX Basic Course Documentation — 5.2 — p. 104
All proposed choices (exam context)
- A.The unit is overloaded, possibly due to a short circuit
- B.The 230 V mains supply has failed
- C.The power supply is active and within its normal operating range
- D.An external voltage higher than 30 V has been applied to the bus side✓
Full bank
Keep going with the full KNX Basic bank
Keep going with the full KNX Basic bank: unlimited timed mock exams, detailed answers, history. From €9 (one-time payment).
See pricing — from €9 →Want more?
See the 9 other KNX Basic practice questions
Related questions
- ETS is available in four versions. Which statement is correct?1. KNX System Arguments · advantages-and-ets
- ETS Lite is limited to projects with how many products, and is primarily intended for whom?1. KNX System Arguments · advantages-and-ets
- What does the "backward compatibility" of KNX mean in practice?1. KNX System Arguments · advantages-and-ets
- In which year was the KNX Association established, and what was it initially called?1. KNX System Arguments · history-and-standardization
- In 1999 the EIBA merged with two other European associations. Which ones?1. KNX System Arguments · history-and-standardization