XtendLan DVR-475EL, Руководство пользователя

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6: Ctrl 12V(This is used for reset the senor)
485 A
、
B
485 communication port. They are used to control devices
such as PTZ.
+12
（
C
）
This should input an external power input(Less than 1 A).

4-ch grounding alarm inputs. (Normal open or Normal close type)

Please parallel connect COM end and GND end of the alarm detector (Provide
external power to the alarm detector).

Please parallel connect the Ground of the DVR and the ground of the alarm
detector.

Please connect the NC port of the alarm sensor to the DVR alarm input(ALARM)

If you need to reset the touched-off alarm remotely, you can use DVR to supply
controllable 12 V power to the alarm detector such as the smoke detector.

Use the same ground with that of DVR if you use external power to the alarm
device.
Figure 3-8
3.7.6 Relay Output Description

2 ways relay alarm output. Provide external power to external alarm device.

To avoid over loading, please read the following relay parameters sheet carefully.
(See below table)

The contro12v can be used to restore the smoke detector.
Please refer to Figure 3-9 for alarm input module information.
Figure 3-9
Please refer to Figure 3-10 for alarm output module information.