SC800 User Manual
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4.6.3 Door Sensor, Exit Button, Alarm and Auxiliary
Connection
4.6.4 Lock Relay Connection
The system supports Normally Opened Lock and Normally Closed Lock. The NO
LOCK (normally unlocked when power-ON) is connected with 'NO' and 'COM'
terminals, and the NC LOCK (normally locked when power-ON) is connected
with 'NC' and 'COM' terminals. Take NC Lock as an example below: