QT-400-4N Manual
QT-400-4N Manual
QT-400-4N Manual
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Alarm output<br />
There are three alarm output pin, the status of these pin are illustrated as<br />
below<br />
Before alarm<br />
N. O.<br />
COM<br />
N. C.<br />
After alarm<br />
There is an example for alarm output connection<br />
N. O.<br />
COM<br />
N. C.<br />
N. O.<br />
COM<br />
N. C.<br />
Alarm<br />
5V<br />
4.Hard Disk Connection<br />
There are several steps to install the hard disk.<br />
Note: If the DVR comes with a HDD, skip the following steps.<br />
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