Nvr50-Ei Series; Alarm Connection; Alarm Port - Dahua NVR2104-I2 User Manual

2.2.31 NVR50-EI Series

The NVR50-EI series rear panel is shown as below.
No. Function
1 Power socket.
3 RS-232 port
5 Audio input
7 Network port
9 USB 3.0 port
12 Ground

2.3 Alarm Connection

2.3.1 Alarm Port

The alarm port is shown as below. The following figure is for reference only.
Figure 2-96 Rear panel
Table 2-44 Ports description
No.
2
4
6
8
10
—
69
User's Manual
Function
Alarm input/alarm output/RS-485
port
Audio output
VGA port
HDMI port
eSATA port
—