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Port Name Connection Function
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
Network port
10/100 Mbps self-adaptive Ethernet port. Connect
to the network cable.
Power input port Power socket.
Power switch Power on/o button.
2.2.14 NVR21-P-I/NVR21-P-I2 Series
The gure is for reference only.
Figure 2-70 Rear panel
User's Manual
45
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