Delta Embedded DVR User Manual Page 39

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39
Figure 3-4
3.8 Alarm Input and Output Connection
Please refer to the following sheet for alarm input and output connection. See X287H287H287HFigure 3-5.X
Figure 3-5
There are two alarm input types for you to select: normal open (NO) and normal close (NC).
1. Alarm input
a. Please make sure alarm input mode is grounding alarm input.
b. Grounding signal is needed for alarm input.
c. Alarm input needs the low level voltage signal.
d. Alarm input mode can be either NC (normal Open) or NO (Normal Close)
e. When you are connecting two DVRs or you are connecting one DVR and one other device,
please use a relay to separate them,
2. Alarm output
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