Honeywell MAXPRO-NET manual External Alarm Inputs, Camera Fail Alarms, PTZ Site Failed Alarms

5.2EXTERNAL ALARM INPUTS

External alarm inputs are usually hard wired into the subrack equipment. They include perimeter security alarms, PIR movement detectors, intercom alarms, door state alarms, and so on.

External alarms are sometimes monitored by a separate security system and communicated back to the MAXPRO-Net system for action.

5.3CAMERA FAIL ALARMS

In some video systems, the cameras are automatically monitored to check for camera malfunction and/or cut-cabling, and so on.

Two types of alarms can be generated:

5.3.1Lost Video

A Lost Video alarm is generated when the video signal from a camera has completely disappeared. The possible causes of this alarm could be blown power-supply fuse and/or cut-cable.

5.3.2Low Level Video

A Low-Level Video alarm is generated when the picture level decreases below a preset point. The low picture level must be present for several seconds before the alarm is actually generated. This detection delay allows for auto-iris lag. PTZ units can move across dark scenes without generating false alarms. The possible causes of this alarm are; the front of the lens is covered, the scene lighting is low, or the camera or lens maybe faulty.

5.4PTZ SITE FAILED ALARMS

In video systems, the camera PTZ site receivers are continuously monitored, even while the site is not being used. If a PTZ site should fail, then an alarm will occur.

While the PTZ site has failed, it is still possible to view a picture from this camera. If, however, the PTZ controls are used, then the operator is again prompted with the following message;

When the PTZ site is repaired, the alarm will clear automatically and PTZ control is restored.

Rev. A	5-2	HMXMU001056
		03/16/05