User’s Manual
30
Table 3-17
Rear panel description
No.
Port Name
Function
1
Audio output port
(MIC OUT)
Two-way talk output port which outputs the analog audio signal to
the devices such as the sound box.
2
Audio input port
(MIC IN)
Two-way talk input port which receives the analog audio signal
output from the devices such as microphone, pickup.
3
Video output port
Connect to video output devices such as TV.
4
Audio output port
Outputs the analog audio signal to the devices such as the sound
box.
5
Audio input port
Receives the analog audio signal output from the devices such as
microphone.
6
Video input port
Connect to analog camera to input video signal.
7
Alarm input port
1–16
Four groups of alarm output ports (Group 1: port 1 to port 4;
Group 2: port 5 to port 8; Group 3: port 9 to port 12; Group 4:
port 13 to port 16). These ports receive the signal from the
external alarm source. There are two types; NO (Normally Open)
and NC (Normally Closed).
When your alarm input device is using external power, make
sure the device and the NVR have the same ground.
Alarm output port
1–5 (NO1–NO5;
C1–C5; NC5)
Five groups of alarm output ports. (Group 1: port NO1–
C1,Group 2: port NO2–C2,Group 3: port NO3–C3, Group 4
：
port
NO4–C4, Group 5: port NO5, C5, NC5). These ports output alarm
signal to the alarm device. Make sure power supply to the
external alarm device.
NO: Normally open alarm output port.
C: Alarm output public end.
NC: Normally closed alarm output port.
RS-485
communication
port
You can connect to the control devices such as speed dome PTZ.
RS-485_A port is connected by the cable A and RS-485_B is
connected to the cable B.
Four-wire full-
duplex RS-485 port
(T+, T-, R+, R-)
Four-wire full-duplex 485 port. T+ and T- is the output wire; R+ and
R- is the input wire.
Control power
output (CTRL 12V)
Controls 12 VDC power output. It is to control the on-off alarm relay
output.
12V power output
port
Provides power to external devices such as camera and alarm device.
Note the supplying power shall be below 1A.
Ground.
8
Network port
Connects to Ethernet port.
9
RS-232 debug
COM.
It is for general COM debug to configure IP address or transfer
transparent COM data.
Summary of Contents for DH-XVR42 AN-I Series
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