Siemens FDS366 RR Sounder Beacon in red housing with red LED

The Siemens FDS366 RR Sounder Beacon in red housing with red LED is an addressable wall-mounted sounder beacon featuring a red housing and red LED strobe designed to deliver high-impact audio-visual emergency warnings. Engineered by Siemens for direct connection to Cerberus PRO and Desigo fire alarm systems on FDnet and C-NET loops, it draws both operating power and digital communications straight from the two-wire line without requiring external power supplies or auxiliary wiring. The device emits high-output acoustic alarm signals with multiple panel-configurable tones and volume settings, paired with a bright red LED visual flasher to penetrate noisy environments and satisfy accessibility notification requirements. Equipped with an integrated short-circuit isolator to preserve loop operational continuity during cable faults, low quiescent power consumption to optimize device capacity, and a rugged flame-retardant red plastic enclosure, it provides long-term dependable evacuation alerting across commercial buildings, healthcare facilities, hotels, and industrial sites.