![background image](http://html1.mh-extra.com/html/dahua-technology/vda-nvr2108w4ks2/vda-nvr2108w4ks2_user-manual_3242717046.webp)
Table of Contents 34
Name
Function
eSATA
eSATA port
External SATA port. It can connect to the device of
the SATA port. Please jump the HDD when there is
peripheral connected HDD.
USB3.0 port
USB3.0 port. Connect to mouse, USB storage
device, USB burner and etc.
HDMI
High
Definition
Media Interface
High definition audio and video signal output port. It
transmits uncompressed high definition video and
multiple-channel data to the HDMI port of the display
device. HDMI version is 1.4b.
MIC IN
Audio input port
Bidirectional talk input port. It is to receive the analog
audio signal output from the devices such as
microphone, pickup.
MIC OUT
Audio output port
Audio output port. It is to output the analog audio
signal to the devices such as the sound box.
Bidirectional talk output.
Audio output on 1-window video monitor.
Audio output on 1-window video playback.
1
~
16
Alarm input port
1
~
16
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.
Ground
Alarm input ground end.
NO1
~
NO5
Alarm output port
1
~
5
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.
C1
~
C5
NC5
A
RS-485
communication
port
RS485_A port. It is the cable A. You can connect to
the control devices such as speed dome PTZ.
B
RS485_B.It is the cable B. You can connect to the
control devices such as speed dome PTZ.