Dahua NVR41-4KS2 Series, User Manual

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User's Manual
47
No. Port Name Function
2 MIC OUT
Audio output port. It is to output analog audio signal to
devices such as sound box.
●
Bidirectional talk output.
●
Audio output on 1-window video monitor.
●
Audio output on 1-window video playback.
3
Alarm input port (1-
4)
●
They receive signals from external alarm source. Alarm
input includes two types; NO (normal open) and NC
(normal close).
●
When your alarm input device is using external power,
make sure the device and the NVR have the same GND.
GND. Alarm input ground port.
NO C One NO activation output group. (On-off button).
CTRL
Controllable power supply output. Control the output of
the on-off button alarm relay. It controls the alarm device
with the presence or absence of voltage. It can also be used
as power input for some alarm devices such as alarm
detectors.
P
Power output port. It can provide power to some
peripheral devices such as camera and alarm device. Make
sure the power supply of peripheral device shall be below
1A.
4 Power button Turns on/off the NVR.
5 GND.
6 USB port
USB3.0 port. Connect to devices such as mouse, USB
storage device and USB burner.
7 MIC IN
Bidirectional talk input port. It is to receive analog audio
signal from devices such as microphone, sound pickup.
8 VGA port
VGA video output port. Output analog video signal. It can
connect to the monitor to view analog video.
9 HDMI port
High definition audio and video signal output port. It
transmits uncompressed high definition video and
multiple-channel audio data to displays with HDMI port.
10 Power input port Input power of 100V-240V and 50Hz-60Hz.