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DVR-4 4-Channel digital Recorder
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3.Alarm connection
The DVR has 1 internal switch for sounding alarm when the sensor is activated due to the
unwanted entrance of anonymous visitor. The switch is open at normal state, but when the alarm is
activated, the switch is closed so that the alarm gets the power. The circuitry is as follows.
There are two simple steps for the installation of an alarm
1. Prepare the power supply
2. Connect the alarm power line.
Now the alarm is ready to sound alarm.