Dahua NVR100 series User Manual page 138

The NVR42-16P-4KS2 series rear panel is shown as below. See Figure 2-77.
Please refer to the following sheet for detailed information.
Name
MIC IN
MIC OUT
1～4
N1, N2
Function
Power switch Power on/off button.
Input DC 12V/4A.
For NVR42-4KS2 series product only.
Switch power port. Input DC 48/96W
Power input port
For NVR42-P-4KS2 series product only.
Input AC90V~264V-12V5A/52V2.5A-190W.
For NVR42-8P-4KS2/NVR42-16P-4KS2 series product
only.
Audio input port Bidirectional talk input port. It is to receive the analog
audio signal output from the devices such as
microphone, pickup.
Audio output port. It is to output the analog audio signal
Audio output port
to the devices such as the sound box.




Alarm input port

1～4
GND Alarm input ground port.

Alarm output port
Figure 2-76
Figure 2-77
Bidirectional talk output.
Audio output on 1-window video monitor.
Audio output on 1-window video playback.
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.
2 groups of alarm output ports. (Group 1：port
128