System information

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4.6 ADVANCED-> ALARM
Alarm port connection
The input side on the back panel of DVR as Figure below, please refer to the physical interface of the
faceplate:
Note: The above picture is the type of normally on alarm, and normally off is the opposite way.
I/O ALARM: Each channel corresponds to an I / O alarm status, which means that alarm recording of
corresponding channel will be started when one channel alarm input is valid.

I/O ALARM: ON: indicating that external alarm circuit is open circuit without alarm but closed circuit
with alarm. OFF: external alarm circuit that is closed circuit without alarm but open circuit with alarm.
Note: When an alarm is valid, a red letter "I" will display on the corresponding screen.

HDD LOSS: On: When the system cannot recognize the HDD, a red logo “H” will display on the
channel.
 HDD SPACE: On: When the remaining space of the HDD is less than 500M, the DVR will have alarm
indication.
 VIDEO LOSS: On: When the video of a certain channel is lost, this channel will display in the lower
part of the Video Preview screen: “Video Loss”.
Alarm input
Alarm output
+ - G 12V G 1 2 3 4 5 6 7 8
Alarm
Alarm trigger
Power