User's Manual
57
Figure 2-78 Alarm Port
Table 2-39
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 (CTRL 12V)
Control power output. Disable power output when alarm is canceled.
Current is 500mA.
P (+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.
●
Different models support different alarm input ports. Please refer to the specifications sheet for
detailed information.
●
Slight difference might 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.
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