Dahua DH-XVR54 L-I2 Series User Manual page 43

No. Port Name
Audio output port
1
(MIC OUT)
Audio input port
2
(MIC IN)
3 Video output port
4
Audio output port
5 Audio input port
6 Video input port
Alarm input port
1–16
Alarm output port
1–5 (NO1–NO5;
C1–C5; NC5)
7
RS-485
communication
port
Four-wire full-
duplex RS-485 port
(T+, T-, R+, R-)
Control power
output (CTRL 12V)
12V power output
port
8 Network port
RS-232 debug
9
COM
Table 3-17 Rear panel description
Function
Two-way talk output port which outputs the analog audio signal to
the devices such as the sound box.
Two-way talk input port which receives the analog audio signal
output from the devices such as microphone, pickup.
Connect to video output devices such as TV.
Outputs the analog audio signal to the devices such as the sound
box.
Receives the analog audio signal output from the devices such as
microphone.
Connect to analog camera to input video signal.
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.
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.
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 485 port. T+ and T- is the output wire; R+ and
R- is the input wire.
Controls 12 VDC power output. It is to control the on-off alarm relay
output.
Provides power to external devices such as camera and alarm device.
Note the supplying power shall be below 1A.
Ground.
Connects to Ethernet port.
It is for general COM debug to configure IP address or transfer
transparent COM data.
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User's Manual