
Use the same ground with that of DVR if you use external power to the alarm device.
Figure 1-11
1.9.3 Alarm Output Port
Provide external power to external alarm device.
For controllable +12V, it can be used to provide power to devices such as reset smoke
sensor.
To avoid overloading, please read relay parameters sheet in the User’s Manual carefully.
RS485 A/B cable is for the A/B cable of the PTZ decoder.
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