Nvr21-W-4Ks2 Series - Dahua NVR41-P Series User Manual

Name
NO1～NO5
C1～C5
NC5
A
B
CTRL 12V
+12V
eSATA
RS-232
HDMI
VGA
PoE
PORTS

2.2.18 NVR21-W-4KS2 Series

The rear panel is shown as below. See Figure 2-67.
Function
GND Alarm input ground port.

Alarm output port
1～5



RS485_A port. It is the cable A. You can connect to
RS-485
the control devices such as speed dome PTZ.
communication
port
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.
Network port
One 10M/100M/1000Mbps self-adaptive Ethernet
port. Connect to the network cable.
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.
USB port USB port. Connect to mouse, USB storage device,
USB burner and etc.
RS-232 debug It is for general COM debug to configure IP address
COM. or transfer transparent COM data.
High definition audio and video signal output port. It
High Definition transmits uncompressed high definition video and
Media Interface multiple-channel data to the HDMI port of the
display device. HDMI version is 1.4.
VGA video output VGA video output port. Output analog video signal.
port It can connect to the monitor to view analog video.
Built-in Switch. Support PoE.
PoE port For PoE series product, you can use this port to
provide power to the network camera.
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.
Front Panel and Rear Panel 46