Honeywell MAXPRO-NET ユーザーズマニュアル

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. 

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: 

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. 

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. 

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