The Photoelectric Smoke Detector (Model OP921) uses state-of-the-art micro controller circuitry and surface-mount technology for maximum reliability. Model OP921 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 OP921 also uses state-of-the-art microprocessor circuitry with error check; detector self-diagnostics, and supervision programs. Each detector fits into one (1) wall-or-ceiling footprint, and only occupies one (1) address on the signal-line circuit (SLC)Model OP921 is a plug-in, two-wire and addressable photoelectric smoke detector. Model OH921 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. Model OP921 maybe installed on the same initiating circuit with the Siemens Model `H’-series detectors [when used with Cerberus PRO Modular | FireFinder XLS/V | FC/FV9–series FACPs] –
• HFP-11, HFPT-11
• Model `XTRI’-series manual stations
• Model `HTRI’-series interfaces
• Model `HMS’-series manual stations
• Model HCP output-control detection devices
• Model `HZM’-series of addressable, conventional zone modules.