Structure and function
3
Function
15
Building Technologies
010095_j_en_--
Fire Safety
2013-02-22
3.2
Function
3.2.1
Escalation levels and volume
The alarm sounder with additional optical display can be activated for the following
selectable escalation levels:
Warning (Alert)
Evacuation (EVAC)
The tone can be configured individually for the two selectable escalation levels; the
sound intensity can be configured by device. Different tones are available, each
with three sound intensities.
The additional optical display has a set flashing frequency of approx. 0.8 Hz and
can be used as follows:
Control panel
Configuration of the additional optical
display
Description
FC20 MP1.1
Not configurable (display activation
always with both escalation levels)
The additional optical display also flashes
whenever the alarm sounder is active.
From FC20 MP1.2
Display activation with both escalation
levels (default)
The additional optical display also flashes
whenever the alarm sounder is active (as with
MP1.1).
Display activation only with 2nd
escalation level (evacuation)
The additional optical display flashes as well only
when 'Evacuation' is configured.
Display activation only with degraded
fire alarm
The additional optical display is only activated
with a degraded fire alarm.
Switched off
The additional optical display is never activated,
i.e., the FDS229 behaves like an FDS221.
The additional optical display does not serve the purpose of evacuation in
accordance with the area of application of EN 54-23.
The degraded fire alarm is a fire alarm which occurs during degraded mode
operation of the fire detector control panel.
Degraded mode operation is a defined reduced operating mode which occurs
when part of the fire detection installation fails.
See also
Alarm sounder [ 24]
Behavior in degraded mode [ 16]
