User's Manual
28
Table 2-21 Rear panel description
Name Function
Power switch Power on/off button.
Power input port
Input 12 VDC/4 A.
For NVR42-4KS2 series product only.
Switch power port. Input 48 VDC/96 W.
For NVR42-P-4KS2 series product only.
Input 90~264-12 VAC 5 A/52 V 2.5 A-190 W.
For NVR42-8P-4KS2/NVR42-16P-4KS24K 1U (S2)
with 8 PoE ports/ 4K 1U (S2) with 16 PoE ports
series product only.
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.
1–4
Alarm input port 1–
4
●
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.
N1, N2
Alarm output port
1–2
●
2 groups of alarm output ports. (Group 1: port
NO1–C1,Group 2: port NO2–C2).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, C2
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.
Network port
10/100/1000 Mbps self-adaptive Ethernet port.
Connect to the network cable.
USB port
USB port. Connect to mouse, USB storage device,
USB burner and more.
RS-232 RS-232 debug COM
It is for general COM debug to configure IP address
or transfer transparent COM data.
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