Federal Signal Models FSF204ST and FSF205ST Selectable Strobe Lights are designed to provide visual indication indoors when activated by a Fire Alarm Control Panel. Each model can be synchronized to work simultaneously with other units and each complies with NFPA requirements and UL categories 464 and 1971 for private mode fire applications.

The model FSF204ST and FSF205ST Selectable Strobe Light provides two different field selectable Strobe outputs. Each model contains a front mounted tamper–proof switch that allows the user to select the amount of strobe light flash energy required for the application. The FSF204ST is capable of either 15 or 30 Candela and the FSF205ST is capable of 75 or 110 Candela. Each model is molded in red and clearly labeled with white FIRE lettering, while polarization is standard for connecting to supervised fire alarm circuits. The FSF204ST and the FSF205ST are available in 24VDC only, but each will operate with a regulated DC supply or a FWR (full–wave rectified) power source. Both the FSF204ST and the FSF205ST are listed for wall mounted indoor use, under the UL1971 standard.

The FSF204ST and FSF205ST can be connected either independently or in unison. Using the FSF206 Synchronization module, the visual pattern can be synchronized if two or more audible appliances are desired.

Each FSF Selectable Strobe light incorporates a slim profile, designed to be unobtrusive and minimize potential obstruction. The included mounting plate is designed to fit a 4 square junction box, 3 1/4 octagon box or plaster ring and it adapts easily to uneven mounting surfaces.