DB952IAS 950 Series Integrated Base Sounder With Isolator

The DB952IAS sounders support multiple tones. A low tone range is
useful in areas such as hospitals where a fire alert is initially intended
to warn staff only. The sounder may be set to the high range for
general use.

In addition to the standard tones in the DB952IAS, a slow whoop tone
to Dutch standard NEN2575 is available in the DB952IAS-NEN, as
well as a German standard DIN tone version in the DB952IAS-DIN.

Syncronisation

Synchronisation of tones ensures the integrity of the signal—tones
from different sounders do not merge into one signal that could be
mistaken for a different tone. DB952IAS sounders are synchronised
with each other in both ‘alert’ and ‘evacuate’ modes.

Self Test

The acoustic self-test means that the sounder listens to itself when it is
switched on. If no sound is detected a fault signal is transmitted when
the sounder is polled.
The same self-test feature may also be used during commissioning or
periodical maintenance testing. The sounder may simply be activated
for at least 5 seconds and the control panel checked for a fault signal.
If none is received, the sounder is working properly.