23
This series DVR offers 4-ch alarm input for external signaling devices, such as door
contacts or motion detectors. Each alarm input can be either normally open or
normally closed. Once configured, an alarm input can invoke many different activities,
including triggering a relay device, sending an alert to a security office or storing pre-
alarm video to the DVR.
3.6.3 Alarm
Input
You should check your alarm input mode is grounding alarm input or not.
For this series DVR, grounding signal is needed for alarm input.
If you need to connect two units or one DVR and other device, please use relay to
separate them.
Please refer to
352H
Figure 3-4 for more information.
Figure 3-4
3.6.4 Alarm
Output
Do not connect alarm output port directly with high power load (no more than 1 A) in
case of heavy current.
You can use the co-contactor to realize the connection between the alarm output port
and the load.
Please refer to
353H
Figure 3-5 for more information.
Figure 3-5
3.6.5 Alarm Input and Output Details
You can refer to the following sheet and
354H
Figure 3-6 for more information.
Parameter
0404 L(N)(Grounding Alarm)
G Ground
line
C1/O1:C2/O2 These are two alarm output ports(Normal Open)
