Edge ED-DVR12004 - Alarm Input Port; Alarm Output Port

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Figure 3-2
You can refer to the following sheet for alarm input and output information.
Parameter
Grounding Alarm
Ground line
Alarm Input
1, 2, …, 8. It becomes valid in low voltage.
1-NO C，
2-NO C，
3-NO C
Three NO activation outputs.
485 A/B
485 communication port. They are used to control devices such as
PTZ. Please parallel connect 120Ω between A/B cables if there are
too many PTZ decoders.
3.7.2 Alarm Input Port
Please refer to the following sheet for more information. See Figure 3-3.
 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 DVR and the ground of the alarm detector.
 Please connect the NC port of the alarm sensor to the DVR alarm input(ALARM)
 Use the same ground with that of DVR if you use external power to the alarm device.
Figure 3-3
3.7.3 Alarm Output Port
 Provide external power to external alarm device.
 To avoid overloading, please read the following relay parameters sheet carefully.
 RS485 A/B cable is for the A/B cable of the PTZ decoder.
AB Connection
port