Dahua Technology DH-XVR1B -I Series, User Manual

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User’s Manual
23
No. Port Name Function
6
RS-485
communication
port
Connects 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.
7 VGA port Outputs analog video data to the connected display with VGA port.
8 USB port
Connects to external devices such as USB storage device, keyboard
and mouse.
9 Power input port Inputs 12 VDC power.
10
Power cable
fastener Use clamp to secure the power cable on the DVR in case there is any
loss.
11 Ground terminal.
3.2.3 DH-XVR52xxA-I2/DH-XVR52xxA-I3/DH-XVR52xxA-4KL-I2/DH-
XVR52xxA-4KL-I3/DHXVR42xxAN-I/DH-XVR42xxAN-I(V2.0)/DH-
XVR52xxAN-I2/DH-XVR52xxAN-I3/DH-XVR52xxAN-4KL-I2/DH-
XVR52xxAN-4KL-I3/DH-XVR72xxA-4K-I2/DH-XVR72xxA-4KL-I/DH-
XVR72xxAN-4K-I2
Rear panel
Table 3-13 Rear panel description
No. Port Name Function
1 Ground terminal.
2
Alarm input port
1–16
Four 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 (Normally Open) and NC (Normally Closed).
When your alarm input device is using external power, make sure the
alarm input device and the DVR connect to the same ground.