Planet DVR-450 User Manual page 9

The threshold voltage is 4.3V and should be stable at least 0.5 seconds to be detected.
• G (Ground), COM (common): G is same as common.
Connect the ground side of the Alarm input to G (Ground). Connect the ground side of
relay output to COM connector.
• Relay output:
The DVR support NO, NC relay output at the same time. You can select NO or NC, according to
characteristic of mechanical or electrical switch.
10. FAN for cooling
11. AC outlet
Connect the power cord to the DVR and then to the wall outlet (100-240V AC).
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