Alarm Operation; Mechanical Alarms - American Dynamics Intellex Intellex DVMS Operating Instructions Manual

Chapter 4 — Advanced Operations

ALARM OPERATION

Mechanical Alarms

The Intellex unit detects and responds to four types of alarm
events:
• Mechanical alarms
• Live filter alarms
• Video loss alarms
• Generated alarms
NOTE: The unit only processes alarm events for cameras that
are being recorded when the alarm occurs.
A mechanical alarm occurs when there is a contact closure or
polarity change at any alarm input.
The alarm connector provides one alarm input and one alarm
output for each camera. The inputs can be connected to any
device equipped with either a contact closure or TTL/CMOS
standard output. The outputs can be connected to any device,
and can operate as a contact closure or TTL/CMOS standard
device.
Alarm input polarity can be set to either Active-Low or Active-
High (see Alarm Setup in the Intellex Installation Instructions).
All alarm outputs are automatically set to a low (inactive) state
when starting up the system.
When the unit detects a mechanical alarm:
1. The unit energizes the alarm output associated with the
camera.
2. The unit records images from the alarm camera at the alarm
record rate and quality setting (see Alarm Setup in the
Intellex Installation Instructions).
3. The unit adds the alarm camera to the alarm group and
records its images more often than nonalarm cameras (see
Alarm Groups).
4. The unit lights the Alarms indicator as soon as the alarm
is cleared.
5. The unit flags the video segment in the image database
with the name of the alarm input.
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