Siemens FDOT421 Intelligent Multi-Criteria Fire Detector

The Siemens FDOT421 is a plug-in, addressable, 2-wire, Intelligent Multi-Criteria Fire Detector that incorporates photoelectric and thermal sensors (Rate-of-Rise Detection: 15°F / min. (8.3°C / min); fixed 135°F (57°C) . Compatible with device programmer / loop tester, Model DPU Requires a surface-mounting base (sold separately) Model DB-11 or Model DB-11E, which mounts on a 4-inch octagonal, square or single-gang electrical box. Designed for use with these compatible Siemens FACPs: — FireFinder XLS FACP — FC2005 50-point addressable FACP — FC2025 252-point addressable FACP — FC2050 504-point addressable FACP — FV2025 252-point addressable intelligent voice communication system — FV2050 504-point addressable intelligent voice communication system