Installation and Operating Instructions 141
Alarm Operations
Chapter 6 — Alarm Operations
ALARM
OPERATIONS
The Intellex unit detects and responds to four types of alarm events:
• Mechanical Alarms on page 141
• Live Filter Events on page 143
• Video Loss Alarms on page 144
• Generated Alarms on page 145
NOTE: The unit only processes alarm events for cameras that
are being recorded when the alarm occurs.
Mechanical Alarms
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 Alarms Setup on page 78). 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 Alarms Setup on page 78).
3. The unit adds the alarm camera to the alarm group and
records its images more often than nonalarm cameras (see
Alarm Groups on page 147).
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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