20
Port Name Connection Function
MIC OUT Audio output
port
RCA Audio output port. Output analog audio signal
to the devices such as sound box.
MIC IN Audio input port RCA
Bidirectional talk input port. Receive the analog
signal from the devices such as speaker or
pickup.
1～16
Alarm input port.
1～16
z Four groups of alarm input ports. The first
group is from port 1 to port 4, the second
group is from port 5 to port 8, the third
group is from 9 to 12, and the fourth group
is from 13 to 16. They are to receive the
signal from the external alarm source.
There are two types; NO (normal
open)/NC (normal close).
z When your alarm input device is using
external power, please make sure the
device and the NVR have the same
ground.
Ground end Alarm input ground end.
NO1～NO5
C1～C5
NC5
Alarm output
port 1～5
z
5 groups of alarm output ports. (Group 1：
port NO1～C1,Group 2:port NO2～C2,Group
3:port NO3～C3.group 4: port NO4～C4、
Group 5：port NO5、C5、NC5).Output
alarm signal to the alarm device. Please
make sure there is power to the external
alarm device.
z
NO：Normal open alarm output port.
z
C：Alarm output public end.
z
NC: Normal close alarm output port.
A RS485_A port. It is the cable A. You can
connect to the control devices such as speed
dome PTZ.
B
RS485 port
RS485_B.It is the cable B. You can connect to
the control devices such as speed dome PTZ.
CTRL 12V Controllable 12V power output. It is to control
the on-off relay output. You can use it to enable
device alarm function.
It can also be used as the power input for some
alarm devices such as the smoke detector.
+12V
I/O port
+12V power output port. It is to provide the
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