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b) Closure group
All sensors that directly protect external doors such as door/win-
dow detectors and PIR motion detectors that are mounted outside
should be assigned to the so-called ‘closure group’.
When the alarm system is activated and in the case of an alarm the sensors
in the ‘closure group’ initially only set off the internal siren of the ‘FAZ 3000-
Z’ alarm base station (the default setting for the alarm duration is 30 seconds,
which you can adjust).
Only afterwards is the ‘normal’ alarm set off (for example, externally via a
siren and a strobe light).
Advantage:
If you forget to deactivate the alarm system when you enter your
house, initially only the internal siren is set off.
You then have 30 seconds in which you can deactivate the alarm
system, before the external siren (and the alarm dialler or PC
interface, for example) signal the alarm outside the building.
Disadvantage:
When there is a ‘real’ break-in, this also forewarns the intruder.
The intruder could then attempt to destroy the alarm system or
parts of the alarm system, if these devices are easily accessible
and are not protected against force.
To avoid this problem it makes sense to use the ‘FAZ 3000-SE’ radio
activation switch with a bolt switching contact.
This device deactivates the alarm system when the house door is opened
properly, and consequently prevents false alarms. At the same time the alarm
is set off without a delay, if one of the sensors activates.
