Siemens FDS224 R Sounder

The Siemens FDS224 R Sounder is an addressable acoustic sounder housed in a durable red enclosure, designed to deliver clear, high-decibel emergency evacuation alerts. Engineered by Siemens for seamless integration with Cerberus PRO and Sinteso fire alarm control panels on FDnet and C-NET loops, it receives both operating power and digital communications directly over the two-wire line without requiring auxiliary power supplies or extra field cabling. The device features multiple panel-configurable alarm tones and adjustable sound output levels up to 99 dB(A) to penetrate ambient background noise and ensure rapid occupant evacuation. Equipped with a built-in short-circuit isolator to preserve loop operational continuity during cable faults, low quiescent current consumption to maximize device capacity per loop, and a high-impact red plastic enclosure suited for wall or ceiling mounting, it delivers long-term dependable acoustic signaling for commercial offices, healthcare facilities, hotels, and educational institutions.