Siemens Fire Alarm System

Approx. Rs 2,450 / PieceGet Latest Price

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microcontroller circuitry and surface-mount technology for maximum reliability. Model FDO421 incorporates an optical sensor using a light- scattering detection principle. The device utilizes advanced software algorithms to analyze the signals, and provides highly stable and accurate smoke detection. Model FDO421 also uses state-of-the-art microprocessor circuitry with error check; detector self-diagnostics, and supervision programs. Each detector is UL 268 7th edition listed incorporating advanced built-in ISOtechnologyTM - True Class-X SLC operation (use is optional) greatly improving system reliability and circuit integrity while providing advanced addressable fault finding. The unit fits into one (1) wall-or-ceiling footprint, and only occupies one (1) address on the signal-line circuit (SLC). Model FDO421 is a plug-in, two-wire, addressable photoelectric smoke detector whose value is increased with built-in ISOtechnology feature. Model FDO421 is Underwriters’ Laboratories Listed [UL268A Listed for direct in-air duct usage]. Each detector consists of a dust-resistant photoelectric chamber and microprocessor-based electronics with a low-profile plastic housing. Every Model FDO421 fire detector is shipped with a protective dust cover. Operation Model FDO421 is a wide-spectrum, photoelectric smoke detector that incorporates an infrared light-emitting diode (IRLED), as well as a light- sensing photodiode. Under normal conditions, light transmitted by the LED is directed away from the photodiode and scattered through the smoke chamber in a controlled pattern. The smoke chamber is designed to manage light dissipation and extraneous reflections from dust particles or other non-smoke, airborne contaminants in such a way as to maintain stable, consistent detector operation. When smoke enters the detector chamber, light emitted from the IRLED is scattered by the smoke particles and is received by the photodiode (see: images on page 2). Model FDO421- Photoelectric Smoke Detector Siemens Data Sheet 6152 Smart Infrastructure - Building Products usa.siemens.com/fire 1 1. Labyrinth 2. Optical transmitter 3. Optical receiver 1. Dust cover 2. Photoelectric smoke detector 2 Model FDO421- Sensitivity Settings Application Parameter Sets Model FDO421 provides two (2) pre-programmed sensitivity parameter sets that can be selected by the Siemens fire-alarm control panel in order to match the expected application or environmental conditions: • Standard • Air-duct Standard: This application parameter set, which is ideal for normal office | hotel-lobby-type applications, is the default setting. Air-Duct: This application parameter set is used when the detector is used a UL268A (DI) compliant, direct in-air duct application without a duct housing. he monitoring, the LED indicator flashes the following: