Q-See QT Series User Manual page 61

The accompanying diagram
consulted to ensure proper connection.
• Normal open or Normal close type
• Parallel connect COM end and GND end of the alarm detector (Provide external power to
the alarm detector).
• Parallel connect the Ground of the combo DVR and the ground of the alarm detector.
• Connect the NC port of the alarm sensor to the combo DVR alarm input(ALARM)
• Use the same ground with that of combo DVR if you use external power to the alarm device.
Alarm input public end should jump out with device power end.
Alarm Device Connection Terminal
+12V
+12V
(Picture 8-2), along with your alarm's manual should be
GND COM PC
GND
Alarm Device
Connection Terminal
PICTURE 8-2
ALARM
GND
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