Alarm input (detector )
Motion detection (camera as video sensor)
In the event of an alarm
Siemens Building Technologies
Fire Safety & Security Products
An alarm input is typically a trigger input of the optocoupler board hardware. An
alarm input is being triggered by an external signal on which a record can be
Each camera is available as a further alarm detector in conjunction with the motion
detection of a camera.
Referring to the configuration, alarm inputs as for example light barriers, or cameras with activated
motion detection can also be understood as alarm detectors
The last picture of a camera is constantly being compared with the current picture
of the same camera. If there is a change in the picture content in a pre-set manner,
SISTORE MX recognises a movement in the picture. This process is called "Motion
Detection" and can be activated for each individual camera.
Motion detection can be used to activate an alarm record and/or record the picture
from a camera only if there is a change in the picture's content. In the first case the
camera itself is being used as an alarm detector also. Considerably less storage
space is required in the case of the latter because only those pictures are saved
where there has been a change in the content of the picture.
Parameters for the motion detection have to be adjusted separately for each
camera. In addition, it is also possible to define sections of the video picture where
motion detection should not or should only be carried out. This enables movements
to be ignored, e.g. movement of trees caused by wind and particular attention to be
given to areas of special interest.
SISTORE MX checks whether there is a recording configuration for a camera for
the signalled event. If this is the case, recording is started in accordance with the
If several events occur at the same time which would result in recording with the
same camera, SISTORE MX decides on the further procedure according to the
stored recording configuration. The following rules apply in this case:
for recordings in the same recording mode (e.g. motion recordings), current
recording continues until all events have been processed;
long-term recordings are interrupted by a movement or alarm contact;
motion recordings are interrupted by an alarm contact;
alarm recordings with normal priority are interrupted by an alarm contact with
Recordings are recorded in the logbook and stored in a database if the option
"logbook entry" has been activated.