Manual

65
Name
Function
MIC IN
Audio input port
Bidirectional talk input port. It is to receive the analog
audio signal output from the devices such as
microphone, pickup.
MIC OUT
Audio output port
Audio output port. It is to output the analog audio signal
to the devices such as the sound box.
 Bidirectional talk output.
 Audio output on 1-window video monitor.
 Audio output on 1-window video playback.
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.
GND
Alarm input ground port.
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
A
RS-485
communication
port
RS485_A port. It is the cable A. You can connect to the
control devices such as speed dome PTZ.
B
RS485_B.It is the cable B. You can connect to the
control devices such as speed dome PTZ.
Power input port
Input DC 12V/5A.
Power
switch
/
Power on/off button.
2.2.13 NVR72-8P Series
The NVR72-8P series rear panel is shown as below. See Figure 2-38.
Figure 2-38
Please refer to the following sheet for detailed information.