Siemens FDB281 Sinteso Base Adapter (MS8 / PMT Transition)
FDB281 is an intermediate base adapter that enables migration to Sinteso detectors without removing the already-installed addressed MS8 detector base from the ceiling. A FDOOT241-8 multi-sensor detector sits on top of the adapter; communication proceeds over the MS8/PMT protocol, meaning the existing line wiring and base mounting remain as they are. The adapter's own height is 37 mm; when a detector is installed, the total dimension of the assembly is Ø117 × 73.5 mm, and the protection class is IP44. Order number A5Q00004929, weight approximately 0.125 kg. In facilities that have grown over the years, maintenance teams can plan a gradual transition using this component to renew the detector configuration in phases, without stopping the system entirely.
Technical specifications
| Architecture | Adresli |
| Order Number | A5Q00004929 |
| Function | Adapts existing MS8 (Z84) / PMT base to Sinteso detectors |
| Detector used | wheeled devices must have |
| Protection class | wheeled devices must have |
| Dimension | Ø117 × 41 mm |
| Weight | 0.125 kg |
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