SDC 490 Series Emergency Break Glass Station with Siren, 3-1/2 Width x 5-1/2 Height x 1-3/8 Depth, Blue (Pack of 1)

SDC 491 Emergency door release break glass station provides immediate unlocking of perimeter doors or interior doors that are equipped with fail-safe electric locks. The 491s built in alarm may be used as a local door annunciator. The SDC 491 is specifically designed for emergency door release and may influence the approval of an electric locking system. This type of Emergency Door Release may be preferred over a pull station since greater commitment is required to break the glass. Aluminum rod for striking the glass is included. Blue housing with easy to read activation instructions avoids confusion with red fire alarm stations. 2-SPDT 10 Amp contacts; 1-SPDT for lock release and 1-SPDT auxiliary contact for remote monitoring, CCTV activation or alarm activation. The SDC 491 may initiate the release of an individual door or all doors on the same circuit. The SDC 491 may be mounted in a 2-inches deep single gang back box or double gang box with plaster ring cover. The SDC 491 may be surface mounted with a 491-BB surface mount back box. Two replacement glass plates included. Measures 3-1/2-inches width by 5-1/2-inches height by 1-3/8-inches depth.