Dahua NVR4108-P User Manual page 67

VIEDEO OUT Video output port
High
HDMI
Media Interface
1～16
Alarm input port
1～16
GND
NO1～NO5
Alarm output port
1～5
C1～C5
NC5
A
RS-485
communication
port
B
CTRL 12V /
+12V /
Network port
eSATA eSATA port
USB2.0 port
CVBS output.
High definition audio and video signal output port.
It transmits uncompressed high definition video
Definition
and multiple-channel data to the HDMI port of the
display device. HDMI version is 1.3.

There are four groups. 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).

When your alarm input device is using
external power, please make sure the device
and the NVR have the same ground.
Alarm input ground port.

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.

NO: Normal open alarm output port.

C: Alarm output public end.

NC: Normal close alarm output 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.
Controller 12V power output. It is to control the
on-off alarm relay output. It can be used to control
the device alarm output. At the same time, it can
also be used as the power input source of some
devices such as the alarm detector.
+12V power output port. It can provide the power
to some peripheral devices such as the camera
or the alarm device. Please note the supplying
power shall be below 1A.
One 10M/100M/1000Mbps self-adaptive Ethernet
port. Connect to the network cable.
External SATA port. It can connect to the device
of the SATA port. Please jump the HDD when
there is peripheral connected HDD.
USB2.0 port. Connect to mouse, USB storage
device, USB burner and etc.
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