Dahua L Series User Manual

107
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.
Figure 2-66
Note
 There are two alarm input types: NO/NC.
 When connect the ground port of the alarm device to the NVR, you can use any of the GND ports

Dahua L Series Specifications

General

Brand	Dahua
Model	L Series
Category	Network Hardware
Language	English