Dahua NVR21-4KS3 Series, User Manual

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User's Manual
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Port Name Connection Function
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.
VGA
VGA video output
port
VGA video output port. Output analog video
signal. It can connect to the monitor to view
analog video.
Network port
10/100 Mbps self-adaptive Ethernet port. Connect
to the network cable.
PoE PORTS PoE port
Built-in switch. Support PoE function.
For PoE series product, you can use this port to
provide power to the network camera.
1–4 Alarm input port 1–4
●
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.
GND Alarm input ground port.
N1, N2
Alarm output port 1–
2
●
2 groups of alarm output ports. (Group 1: port
NO1–C1, Group 2: port NO2–C2).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.
C1, C2
Power input port — 90~264-12 VAC 12.5 A/-53 V 2.83 A
Power input port Power socket.
Power switch Power on/off button.