Dahua NVR21-4KS3 Series, User Manual

Page: 52 / 485

User's Manual
32
Name Function
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.
CTRL (CTRL 12
V)
—
Controller 12 V 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.
The two ports
serve as
another
group of
alarm output
ports.
P (+12 V) —
+12 V 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 1 A.
RS-232
RS-232 debug
COM
It is for general COM debug to configure IP address or
transfer transparent COM data.
VGA
VGA video output
port
VGA video output port. Output analog video signal. It can
connect to the monitor to view analog video.
PoE PORTS —
Built-in Switch. Support PoE or ePoE function.
For ePoE series product, port 1 to port 8 are the ePoE
ports. ePoE port supports 300 meters@100 Mbps, 800
meters@10 Mbps. Port 9 to port 16 are general PoE ports.
The 16 PoE series supports total 150 W.
2.2.6 NVR41-4KS2/NVR41-P-4KS2/NVR41-8P-4KS2/NVR41-