The Schlage M490DE-2 maximum-security electromagnetic lock with delayed-egress feature meets or exceeds Builders Hardware Manufacturer Association (BHMA) 1,500-lb. hold force requirements per electromagnet and connects to a door access system such as a push bar, request-to-exit device, or credential reader to create a secure locking system for double inswing or outswing doors. Triggered by a request-to-exit device or other switch, the lock prevents egress for 15 seconds while an audible alarm sounds, conforming to the National Fire Protection Association (NFPA) 101 Life Safety Code. The electromagnets mount to below the top of the doorframe using the included bayonet mounting brackets that enable hands-free installation of the magnets. The armatures attach flush against the door and pivot to compensate for slight irregularities. The magnet portions are active when connected to a power source, and they lose their magnetic hold and unlock the doors when power is removed either with a door access system such as a push-to-exit button or by power outage (also called a fail-safe design).
The automatic voltage selection feature distinguishes between either a 12- or 24-VDC electrical connection and adjusts the lock automatically, eliminating the need for field adjustment when voltage changes, and the automatic surge suppressor protects the equipment from damage if voltage spikes. The lock housing has a satin chrome finish and has a symmetrical design that allows for both right and left hand installation.
|Holding force||1,500 lb. per electromagnet|
|Specifications met||Designed to meet NFPA 101 Life Safety Code. Lock meets UL294 special locking arrangement including BOCA, UL1034, UL10C, ANSI/BHMA 156.23 specifications. Lock meets or exceeds BHMA 1,500-lb. hold force requirements per electromagnet.|
|Electromagnet dimensions||3 x 25-1/16 x 3-1/16 inches (H x W x D)*|
|Current draw||1.25A @ 12 VDC, 0.76A @ 24 VDC|
|Power supply||12 or 24 VDC|
*H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.
For more information, see the manufacturer's literature.
Electronic door locking systems use electric current to control and secure access. Entry is regulated with a door access device such as a keypad or a reader that limits entry to authorized users. Some systems can designate user access for specific hours or days and may include a keyway for mechanical override. Common electronic locking mechanisms include electromagnetic locks and electric strikes. These systems are hardwired or battery powered, which is suitable when electrical wiring is not readily available. Locks are available in cylindrical and mortise styles. A cylindrical lock requires two bored perpendicular holes in the door for installation: one in the door face and a crossbore hole in the door edge. A mortise lock fits into a pocket recess in the door edge.
Schlage Electronics, an Allegion brand, manufactures security products for commercial and residential use. Allegion is headquartered in Carmel, IN.