NKB24A NKB24B Elevator Electronic Charm DC12V DC24V
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NKB24A NKB24B Elevator Electronic Charm DC12V DC24V
This product is an electronic arrival clock for elevators.
Positive trigger (NKB24A ）will ring after T1 and T2 are connected to the working voltage,
and negative trigger (NKB24B）will ring after T1 and T2 are directly short-circuited.
It makes a ding dong sound when working and the volume cannot be adjusted.
