Manual

82
Figure 2-48
Icon
Function
1～16
ALARM1～ALARM16. The alarm becomes activated in the
low level.
NO1 C1，NO2 C2，NO3 C3，NO4
C4
Four NO activation output groups. (On-off button).
NO5 C5 NC5
One NO/NC activation output group. (On-off button).
CTRL 12V
Control power output. Disable power output when alarm is
canceled. Current is 500mA.
＋12V
Rated current output. Current is 500mA.
GND
A/B
485 communication port. They are used to control devices
such as PTZ. Please parallel connect 120TΩ between A/B
cables if there are too many PTZ decoders.
Note
 Different models support different alarm input ports. Please refer to the specifications sheet for
detailed information.
 Slight difference may be found on the alarm port layout.
2.3.2 Alarm input port
Connect the positive end (+) of the alarm input device to the alarm input port (ALARM IN 1～16) of the
NVR. Connect the negative end (-) of the alarm input device to the ground end (
) of the NVR.