Dahua Smart 1U User Manual page 24

No. Port Name
Alarm input port
1–16
1
Alarm output port
1–3 (NO1–NO3;
C1–C3)
2 Video input port
3 Audio input port
4 DB25 port
5 Audio output port
6 HDMI port
7
USB port
8
Network port
RS485
9 communication
port
10 Power input port
11
VGA port
12 Power button
Power cable
13
fastener
14
Function
4 groups of alarm input 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 (normal open) and NC (normal
close).
When your alarm input device is using external power, please
make sure the alarm input device and the Device have the same
ground.
3 groups of alarm output ports (Group 1: port NO1–C1,
Group 2: port NO2–C2, Group 3: port NO3–C3). These ports
output alarm signal to the alarm device. Please make sure
power supply to the external alarm device.
NO: Normal open alarm output port.
C: Alarm output public end.
Ground.
Connects to analog camera to input video signal.
Receives audio signal output from the devices such as
microphone. It corresponds to video input port 1.
Connects to the audio splitter taken from the package to convert
to audio input port which receives the audio signal from devices
such as microphone. It corresponds to video input ports 2–16.
Outputs audio signal to the devices such as the sound box.
High definition audio and video signal output port.
The port outputs the uncompressed high definition video and
multi-channel audio data to the connected display with HDMI
port.
Connects to external devices such as USB storage device,
keyboard and mouse.
Connects to Ethernet port.
Connects to the control devices such as speed dome PTZ.
RS485_A port is connected by the cable A and RS485_B is
connected to the cable B.
Inputs DC 12V power.
Outputs analog video data to the connected display with VGA
port.
Turns on/off the DVR.
Use a cable tie to secure the power cable on the DVR to prevent
loss.
Ground terminal.
The Grand Tour 14