Dahua NVR4204-P-4KS2 User Manual page 104

Name
MIC IN Audio input port
MIC OUT Audio output port
Alarm input port
1～4
1～4
GND
N1, N2 Alarm output port
1～2
C1, C2
A
RS-485
communication
port
B
Network port
port
RS-232
RS-232
COM.
High
HDMI
Media Interface
VGA
VGA
output port
Function
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 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.

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.
RS485_A port. It is the cable A. You can connect to the
control devices such as speed dome PTZ.
RS485_B.It is the cable B. You can connect to the
control devices such as speed dome PTZ.
10M/100M/1000Mbps self-adaptive Ethernet port.
Connect to the network cable.
USB2.0 USB2.0 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.
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.
video VGA video output port. Output analog video signal. It
can connect to the monitor to view analog video.
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