
are to receive the signal
from the external alarm
source. 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 NVR
have the same ground.
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.
RS485 (RS-485)
communication port
RS485_A port. It is the cable A.
You can connect to the control
devices such as speed dome
PTZ.
RS485_B.It is the cable B. You
can connect to the control
devices such as speed dome
PTZ.
2.2.3 General 720P 1.5U Series and Advanced 1080P 1.5U Series
This series products’ rear panel is shown as below. See Figure 2-6.
The following figure is based on the 16-channel series product.
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