Manual

15
Port Name Connection Function
1-3 Alarm input
port 1-3.
z Alarm input port.
z When your alarm input device is using
external power, please make sure the
device and the NVS have the same
ground.
Alarm input
port ground
end
Alarm input ground end.
NO
C
Alarm output
port
z 3 groups of alarm output ports. (Group 1：
port NO1～C1,Group 2:port NO2～
C2,Group 3:port NO3～C3）).Output
alarm signal to the alarm device. Please
make sure there is power to the external
alarm device.
z NO：Normal open alarm output port.
z C：Alarm output public end.
A RS485_A port. It is the cable A. You can
connect to the control devices such as speed
dome PTZ.
B
RS485 port
I/O port
RS485_B.It is the cable B. You can connect to
the control devices such as speed dome PTZ.
Power input
port
Input 12V DC.
Power button Power on/off button.
PoE PORTS Built-in Switch supports PoE function.
Power input
port
Switch power port. Input DC 48V.
MIC IN Audio input
port
Bidirectional talk input port. It is to receive the
analog audio signal output from the devices
such as mike phone, 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.
eSATA
eSATA port
External SATA port. It can connect to the
device of the SATA port. Please jump the HDD
when there is peripheral connected HDD.
2.2.3 NVR7XXN Series
The rear panel is shown as below. See Figure 2-6.