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Q-See QT446 User Manual Page 62

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62
NO C
1
NO C
2
1 2 3 4 5 6 7 8
A B
CNTRL
12V
ALARM IN
Many QT Series NVRs 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 7-1 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 NVR.
ALARMS
CHAPTER 7
7.1 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 NVR to another
device - including another NVR - 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.
PICTURE 7-1
Consult your alarm’s manual to ensure proper connection. Some common terms and
guidelines are shown below:
• Normal open or Normal close type
• Parallel connect COM end and GND end of the alarm detector (Provide exter
nal power to
the alarm detector).
• Parallel connect the Ground of the combo NVR and the ground of the alarm detector.
• Connect the NC port of the alarm sensor to the combo NVR alarm input(ALARM)
• Use the same ground with that of combo NVR if you use external power to the alarm device.
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