Dahua Technology NVR41 Series, Руководство пользователя, Страница: 55 / 355

Front Panel and Rear Panel 43
Name Function
Power input port Input DC 12V/4A.
For NVR42-4KS2 series product only.
Switch power port. Input DC 48/96W
For NVR42-P-4KS2 series product only.
Input AC90V~264V-12V5A/52V2.5A-190W.
For NVR42-8P-4KS2/NVR42-16P-4KS2 series product
only.
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
～
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
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 / Controllable 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.
P / Power output port. It is to offer power to external
devices such as cameras and alarm devices, and the
current of the device power supply should be below 1A.