117dB(A) alarm horn. The D1xS1F is a high output alarm horn sounder with re-entrant flare horn. Low current consumption and high SPL in a robust Type 4/4X, IP66 marine grade, corrosion proof aluminium enclosure ensure the D1xS1F is suitable for all Class I and II Division 1, Zone 1 and 20 explosion proof signalling applications. The 24Vdc version is approved for public mode fire alarm use and the 110-240V ac version for general signalling use.
Featuring 64 alarm sounds, the alarm tone frequencies for the first 2 stages are independently selectable. Each of the available 4 stage/channels can be remotely triggered e.g. via an external relay. Approved for gas groups ABCD for use in Class I Division 1, Class I Zone 1 IIC and for dust groups FG for use in Class II Division 1, Zone 20 IIIB environments. The termination chamber and cover feature a threaded flameproof joint simplifying both installation and routine maintenance.