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I EDWARDS <br />LIFE SAFETY �_ INCIDENT MANAGEMENT <br />Intelligent Smoke <br />Detector I <br />SIGA-OSD <br />A—d\�Il—_lr1V <br />The Signature Optica Series SIGA-OSD smoke detector <br />brings advanced optical (photoelectric) technology to a practical <br />design that increases efficiency, saves installation time, <br />cuts costs, and extends life safety and property protection <br />capabilities. Continuous self -diagnostics ensure reliability <br />over the long -haul, while environmental compensation helps <br />reduce maintenance costs. <br />Like all Signature Optica Series detectors, the SIGA-OSD is an <br />intelligent device that gathers analog information from multiple <br />optical sensors, converting this data into digital signals. Utilizing <br />dual optical wavelengths combined with multiple detection angles, <br />the SIGA-OSD differentiates particles that are not representative <br />of actual smoke. Particle data is input into digital filters which <br />feed a series of ratios removing signal patterns that are typical of <br />nuisance sources, thus reducing unwanted alarms. To make an <br />alarm decision, the detector's on -board microprocessor measures <br />and analyzes all optical sensor readings and compares this <br />information to preprogrammed settings. <br />EDWARDS® Catalog ► Intelligent Initiating Devices <br />name <br />/ WON <br />ol` <br />r , <br />nUL <br />7272-1657 <br />0511 <br />Standard Features <br />• Multi -criteria optical smoke sensing technology <br />• Wide 0.5 to 4.36 %/ft. (1.6 to 13.6 %/m) smoke obscuration <br />• Uses Existing Wiring <br />• Integrated nuisance rejection reducing unwanted alarms <br />from general cooking particulates <br />• Listed to UT 268 7th edition <br />• Automatic Device Mapping <br />• Up To 250 Total Signature Addresses Per Loop <br />• Two Levels of Environmental Compensation <br />• Two Levels of Dirty Detector Warning <br />• Twenty Pre -Alarm Settings <br />• Five Sensitivity Settings <br />• Non -Volatile Memory <br />• Electronic Addressing <br />• Automatic Day/Night Sensitivity Adjustment <br />• Bicolor (Green/Red) Status LED <br />• Standard, Relay, Fault Isolator, and Audible Mounting Bases <br />• Sensor Markings Provide Easy Testing Identification <br />Note, Some features described here may not be supported by all control <br />systems, Check your control panel's Installation and Operation Guide for details, <br />Page 1 of 4 <br />DATA SHEET E85001-1001 <br />Not to be used for installation purposes. Issue 1.4 <br />