Dahua DHI-NVR5208-4KS2 User Manual page 39

Icon Port Name
Network port
High
HDMI
Media Interface
USB3.0 port
RS-232
RS-232
COM.
VGA video output
VGA
port
MIC IN Audio input port
MIC OUT Audio output port
Alarm input port
1～8
1～8
GND
NO1～NO3
Alarm output port
1～3
C1～C3
RS-485
A
communication
Table 2-20
Function
10M/100M/1000Mbps
Connect to the network cable.
High definition audio and video signal output port. It
Definition transmits uncompressed high definition video and
multiple-channel data to the HDMI port of the display
device. HDMI version is 1.4.
USB3.0 port. Connect to mouse, USB storage device,
USB burner and etc.
debug It is for general COM debug to configure IP address or
transfer transparent COM data.
VGA video output port. Output analog video signal. It can
connect to the monitor to view analog video.
Bidirectional talk input port. It is to receive the analog
audio signal output from the devices such as
microphone, pickup.
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.

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 ground port.

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.
RS485_A port. It is the cable A. You can connect to the
control devices such as speed dome PTZ.
self-adaptive Ethernet
Front Panel and Rear Panel 28
port.