Common methods and diagrams for connecting video doorbells to sliding doors
Common methods and diagrams for connecting video doorbells to sliding doorsFirst confirm whether the electric lock is normally closed (NC) or normally open (NO)? This doorbell power supply can only be connected to a normally open (NO) electric lock. If it is normally closed (NC), it must be equipped with a door access power supply to open it. Otherwise, the normally closed (NC) electric lock will be in a normally open state.
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