Dahua HDCVI series, User Manual

Page: 49 / 348

39
Figure 2-11
Please refer to the following sheet for detailed information.
SN Icon Name Note
1 Power switch Power on/off button.
2 1
～
8(16) Alarm input
port 1
～
8(16)

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 DVR
have the same ground.
NO1
～
NO3 Alarm output
port 1
～
3

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.
C1
～
C3
3 VGA VGA video
output
port
VGA video output port. Output analog video signal.
Can connect to the monitor to view ananlog video
output.
4 AUDIO IN Audio input
port
Connect to audio input device such as speaker.
5 VIDEO IN Video input
port
Connect to analog camera, video input signal.
6 GND Alarm input ground port.
7 Power input
port
Input 12V DC.
8 USB2.0 port Connect to USB storage device, mouse, burning
DVD-ROM and etc.
9 A RS485
（
RS-485
）
RS485_A port. It is the cable A. You can connect to
the control devices such as speed dome PTZ.