ZKTeco MB20-VL, Quick Start Manual, Page: 5 / 10

4
5. Lock Relay Connection
The system supports Normally Opened Lock and Normally Closed Lock.
The
NO LOCK (normally unlocked when powered) is connected with ' NO ' and
' COM ' terminals, and the NC LOCK (normally locked when powered) is connected
with ' NC ' and ' COM ' terminals. Take NC Lock as an example below:
6. Power Connection
Recommended AC adapter ,
:
5V 2A
To share the power with other devices, use an AC adapter with higher
current ratings .
DC 5V, 2A
Not sharing power with the lock
DC5V
+
5V
GND
NC1
COM1
NO1
SEN
GND
BUT
FR107
DC12V
NC Lock