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Please refer to the following sheet for detailed information.
SN
Name
1
Alarm input/alarm output
3
Power port
5
eSATA port
7
SAS port
9
Network port
11
RS232（RS422） port
13
Audio output port
2.3 Alarm Input and Output Connection
Please refer to the following sheet for alarm input and output connection.
There are two alarm input types for you to select: normal open (NO) and normal close (NC).
1. Alarm input
a. Please make sure alarm input mode is grounding alarm input.
b. Grounding signal is needed for alarm input.
c. Alarm input needs the low level voltage signal.
d. Alarm input mode can be either NC (normal Open) or NO (Normal Close)
e. When you are connecting two NVRs or you are connecting one NVR and one other device,
please use a relay to separate them,
Figure 2-4
SN
Name
2
HDMI port（Reserved port. Right now
system does not support HD decode
card.）
4
HDMI port
6
USB port
8
Video VGA output
10
RS485 port
12
Audio input port
7
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