The sounder base FDSB291 provides an acoustic alarm in the addressed fire detection system
The sounder base FDSB292 provides an acoustic alarm on a collective detector line. If the detector line is migrated to FDnet, the behavior of the sounder bases FDSB291 and FDSB292 is identical
In the event of a fire alarm, the detector LED flashes and an acoustic signal sounds
Alarm sounders FDS221‑R, FDS221‑W
Sound level of alarm sounding in the event of a fire alarm; clearly recognizable as a danger signal