Siemens FDO421 Addressable Photoelectric Smoke Detector SF 11/02 — DB-11E Detector Base (small)

— DB-11E Detector Base (small)

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Siemens FDO421 Addressable Photoelectric Smoke Detector SF 11/02 — DB-11E Detector Base (small)The Siemens FDO421 is an intelligent, addressable photoelectric smoke detector designed for use with Desigo Fire Safety and FireFinder XLS V series control panels. It incorporates microprocessor based signal processing and an optical light scattering sensing chamber to provide stable and accurate smoke detection. The FDO421 features built in ISOtechnology to support True Class X SLC operation (optional use), enhancing loop reliability and enabling