Dahua HDCVI - Page 49

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.