American Dynamics Intellex DV8000 Installation And Operating Instructions Manual page 125

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Intellex Digital Video Management System Installation and Operating Instructions
Mechanical Alarms
Alarm Operations
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). 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
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.
6. If the Pre-Alarm Duration option is selected, the unit saves
the pre-alarm images to the image database (see
Schedule Setup).
7. If the Alarm Message Display option is selected (see
Setup):
a. If the camera is not currently displayed or is displayed in
the camera sequencing window, the unit switches the
live display monitor to the 4x4 format and overrides the
display settings for the duration of the alarm (see
Setup).
b. The unit displays ALARM over the camera image.
c. If the Latch Messages option is selected (see
Alarm Setup).
Custom
Alarm
Display
Alarm
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