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CNTRL
12V
ALARM IN
Many QT Series DVRs feature connections for external alarms – both input and output. Please
consult Chapter 2 Connections and Controls to determine whether your model includes
this feature and where the connection block is located. The alarm connector block shown in
Picture 8-1 is only a representation and your actual connector may look different.
When an event is detected the system can notify local users or send notification to a
monitoring service. At the same time, the system can accept signals from motion detectors,
smoke detectors or other alarms and begin recording based on that input and your settings.
You will need to have the manual for your alarm(s) handy to ensure the proper settings within
the DVR.
ALARMS
CHAPTER 8
8.1 ALARM INPUT
When attaching alarms, the following criteria
must be met:
1. The alarm input must be grounded.
2. A grounding signal is required for the
alarm input
3. When connecting the DVR to another
device - including another DVR - through
the alarm input, a relay should be used to
separate them.
Parameter Grounding Alarm
Ground line
Alarm Input 1, 2, …, 8 becomes valid in low voltage.
1-NO C
2-NO C
Two NO activation outputs.
CTRL 12V Controls the power output
You need to close the device power to
cancel the alarm.
PICTURE 8-1
The accompanying diagram (Picture 8-2), along with your alarm’s manual should be
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.
PICTURE 8-2
+12V GND COM PC
GND
ALARM
Alarm input public end should jump out with device power end.
Alarm Device Connection Terminal
Alarm Device
Connection Terminal
+12V GND