Siemens FDOOT241-8B Sinteso Modernization Kit (Detector + FDB221 Addressed Base)

FDOOT241-8B is a modernization kit that combines multi-sensor optical smoke + heat detector FDOOT241-8 with FDB221 detector base under a single order number (A5Q00015956). The kit is prepared for gradual transition of older Siemens systems operating with MS8 protocol (SIGMASYS, BMS, SM80/88, D100, SRS) to Sinteso FDnet infrastructure; the detector recognizes both protocols and is powered by DC 14…28 V on MS8 line, DC 12…33 V on FDnet line, with quiescent current at 200 µA (MS8) / 190…230 µA (FDnet) level. The detector falls within EN 54-5 and EN 54-7 scope, and the short-circuit isolator on it falls within EN 54-17 scope; VdS approval number is G204133. It reaches IP43 protection class together with FDB221 base, can be used in environments up to 1…20 m/s air velocity, and housing color is RAL 9010 shade. It should be evaluated when modernizing an MS8 system operating in field, not when establishing new installation; kit weight is 0.162 kg.