SF series user manual V1.0
3.2 Connection with door lock
The device is able to support NO (normally open) and NC (normally
closed) locks, only if connected with different terminals. NO terminal
should be used for NO lock, which is open during power on and closed
during power off. And NC terminal should be used for NC lock, which
is closed during power on and opened during power off.
1. Device and lock share power supply
※Note: In case that device and lock share the power supply:
When U
LOCK=12V， I-ILOCK>1A（(thereinto, ULOCK is the operate
voltage of lock, I is the output current of device’s power supply, I
LOCK is
the operate current of lock.) And the distance between lock and device is
closer.
(1) NC lock
SF series
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