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SIEMENS DetectorsDesigo@ Fire Safety • Peripherals Photoelectric Smoke Detector Model D•4 Architect& Engineer • - • -ProductOverview ❑ UL 268 Th edition Listed The Photoelectric Smoke Detector (Model FD0421) uses state-of-the-art ❑ Built-in ISOtechnologyTm microcontroller circuitry and surface-mount technology for maximum ❑ 252 Isolation devices per SLC reliability. Model FD0421 incorporates an optical sensor using a light- El Compatible with 'H'-series devices on the scattering detection principle. The device utilizes advanced software same loop(with Desigo Fire Safety series algorithms to analyze the signals, and provides highly stable and accurate fire-alarm control panels) smoke detection. ❑ Compatible with Model DPU(device Model FD0421 also uses state-of-the-art microprocessor circuitry with error programmer/loop tester) check; detector self-diagnostics,and supervision programs. ❑ Each detector is self-testing: self-monitored for sensitivity Each detector is UL 268 7th edition listed incorporating advanced built-in with UL Listed limits ISOtechnologyTM - True Class-X SLC operation (use is optional) greatly complete diagnostics performed improving system reliability and circuit integrity while providing advanced every 10 seconds addressable fault finding. ❑ Polarity insensitive via SureWireTm technology The unit fits into one (1) wall-or-ceiling footprint, and only occupies one (1) ❑ Functions with Model DB-11-series address on the signal-line circuit(SLC). mounting bases ❑ Tri-color detector-status light-emitting Model FD0421 is a plug in, two wire, addressable photoelectric smoke diode(LED)with 360°view detector whose value is increased with built-in ISOtechnology feature. Model ❑ Field-selectable application-sensitivity profiles FD0421 is Underwriters' Laboratories Listed [UL268A Listed for direct in-air ❑ Remote sensitivity-measurement capability duct usage]. ❑ Utilizes advanced,microprocessor-based Each detector consists of a dust-resistant photoelectric chamber and signal processing microprocessor-based electronics with a low-profile plastic housing. Every ❑ Extended temperature-and-humidity Model FD0421 fire detector is shipped with a protective dust cover. operating range Operation ❑ Automatic environment compensation ❑ Superior electromagnetic interference(EMI) Model FD0421 is a wide-spectrum, photoelectric smoke detector that and radio-frequency interference(RFI) incorporates an infrared light-emitting diode (IRLED), as well as a light- immunity sensing photodiode. Under normal conditions, light transmitted by the LED ❑ Restriction of Hazardous Substances is directed away from the photodiode and scattered through the smoke (RoHS compliant) chamber in a controlled pattern. ❑ UL Listed I FM&CSFM Approved The smoke chamber is designed to manage UL 268:'Open Area Smoke Detection' light dissipation and extraneous reflections UL 268A(Duct)-'In-duct housing'use from dust particles or other non-smoke, UL 268A(Duct)-'Direct-in-Duct'use airborne contaminants in such a way as to ULC-S529:'System Smoke Detection' - ULC-5530: 'Heat Actuated Fire Detection' maintain stable, consistent detector FM 3230 operation. When smoke enters the detector CSFM I File:7272-0067:0258 chamber, light emitted from the IRLED is scattered by the smoke particles and is received by the photodiode (see: images on Photoelectric Smoke Detector page 2). KFI V APDROVED u Siemens Data Sheet 6152 Smart Infrastructure- Building Products usa.siemens.comlfire