Siemens FDOT421 multi sensor smoke detector

Siemens FDOT421 Multi-sensor Smoke Detector Fire Alarm & base  FDOT421 Intelligent, Addressable Multi-Criteria Fire Detector Based on the results of the monitoring, the LED indicator flashes the following: FLASH COLOR CONDITION FLASH INTERVAL [in seconds] GREEN: Normal supervisory operation. Smoke sensitivity is within rated limits. 10 YELLOW: Detector is in trouble and needs replacement. 4 RED: `Alarm' condition 1 NO FLASH: Detector is not powered.  The Photoelectric | Thermal (Heat) Detector (Model FDOT421) is an intelligent, addressable multi-criteria detector that incorporates optical and thermal sensors, and uses signals in a neural network to create an intelligent multi-criteria detector. The encompassing result is a detector that provides enhanced detection to a wide range of products of combustion. Model FDOT21 is UL 268 7th Ed. listed and incorporates advanced built-in ISOtechnologyTM - True Class-X SLC operation (use is optional) greatly improves reliability, circuit integrity and provides advanced addressable fault finding. The multi-criteria detector additionally has state-of-the-art microprocessor circuitry, as well as detector self-diagnostics and supervision programs that is used on Desigo Fire Safety Modular | FireFinder XLS/V and on Model FC/FV20-series Desigo Fire Safety fire-alarm control panels (FACPs). Additionally, Model FDOT421 is a plug-in and addressable multi-criteria detector (with both photoelectric and thermal sensors) whose value is increased with builtin ISOtechnology feature, that is compatible with all current Siemens intelligent, addressable systems.