Dahua NVR6000 Series - NVR724 Series; Alarm Input and Output Port; Alarm Output Port

2.3.1.3 NVR724 Series
You can refer to the following sheet for alarm input and output information. See Figure 2-19.
Figure 2-19
Icon
Note
1～4
ALARM 1 to ALARM 4. The alarm becomes active in low
voltage.
NO1 C1，NO2 C2，NO3 C3，NO4
C4
Four groups of normal open activation output (on/off
button)
GND
2.3.2 Alarm input and output port
Please refer to the following sheet for more information.
 Grounding alarm inputs. Normal open or Normal close type)
 Please parallel connect COM end and GND end of the alarm detector (Provide external power to the
alarm detector).
 Please parallel connect the Ground of the NVR and the ground of the alarm detector.
 Please connect the NC port of the alarm sensor to the NVR alarm input(ALARM)
 Use the same ground with that of NVR if you use external power to the alarm device.
Figure 2-20
2.3.3 Alarm Output Port
 Provide power to peripheral alarm device.
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