User`s manual

43
Icon
Port Name
Function
Power button
Power on/off button.
Alarm input port
ground end
Alarm input ground end.
1～8
Alarm input port
1-8.
 There are two groups. The first group is from port 1 to
port 4; the second group is from port 5 to port 8. They are
to receive the signal from the external alarm source.
There are two types; NO (normal open)/NC (normal
close).
 When your alarm input device is using external power,
please make sure the device and the NVR have the
same ground.
Alarm input port
ground end
Alarm input ground end.
NO1～NO3
Alarm output port
1～3
 3 groups of alarm output ports. (Group 1：port NO1～
C1,Group 2:port NO2 ～ C2,Group 3:port NO3 ～
C3）).Output alarm signal to the alarm device. Please
make sure there is power to the external alarm device.
 NO：Normal open alarm output port.
 C：Alarm output public end.
C1～C3
2.2.5 NVR31/31-W /31-P/31-S Series
The NVR31series rear panel is shown as below. See Figure 2-20.
Figure 2-20
The NVR31-W series rear panel is shown as below. See Figure 2-21.