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NetDVR User Manual [10]
2.4
External Alarm In/Out Connection
Alarm input connection
Alarm output connection
Please note the usage of jumper JJ1. If you use DC, either connection is OK. We suggest you to use those DC under 12V, 1A.
If you use AC power supply for relay output, please open the jumper. There are 4 jumpers (JJ1, JJ2, JJ3 and JJ4) in NetDVR main board, corresponding with 4 alarm
outputs. The default is closed.
Alarm input port
1~8: Alarm inputs, support normal open/normal close.
G: GND of sensor.
0: Reserved.
Alarm output
1G~4G: 4 relay outputs.
(G= GND)
Warning: If you use AC input for relay output, please open the jumpers.