Schlage M490 Single Door Electromagnetic Lock

The Schlage Locknetics M490 is a Grade 1 high-security electromagnetic door lock designed for single-door commercial access control applications. Providing 1,500 lbs of magnetic holding force, the fail-safe lock operates on 12 or 24VDC with automatic voltage selection and draws 650mA at 12VDC or 350mA at 24VDC. The surface-mounted M490 features a symmetrical, field-selectable mounting design and a bayonet-style installation bracket. Listed to UL 294, UL 1034, and UL 10C, it meets ANSI/BHMA A156.23 Grade 1 requirements for commercial electromagnetic locking hardware.

Schlage Locknetics M490 Grade 1 1,500 lb Electromagnetic Door Lock

The Schlage Locknetics M490 Electromagnetic Lock is a high-security magnetic locking device engineered for commercial single-door access control and controlled egress applications. Part of the Schlage M400 Series, the M490 delivers 1,500 pounds of magnetic holding force through an electromagnet mounted to the door frame and a corresponding armature plate mounted to the door. When energized, the magnet attracts and holds the armature to secure the opening. Its fail-safe operating configuration automatically releases the magnetic bond when electrical power is removed, allowing integration into properly designed access-controlled egress systems. The lock is suitable for commercial offices, healthcare facilities, educational buildings, institutional properties, and other security-sensitive entrances requiring high-strength electromagnetic locking.

The M490 incorporates Automatic Voltage Selection (AVS), which detects the incoming DC supply voltage and automatically configures the lock for 12VDC or 24VDC operation without manual voltage switching. Manufacturer electrical specifications identify a current draw of 0.65A at 12VDC and 0.35A at 24VDC, allowing installers to calculate power requirements for compatible regulated access control power supplies. The electromagnetic assembly measures 12-1/2 inches long, 3 inches high, and 1-3/4 inches deep, with an approximate weight of 14 pounds. Field wiring connections accommodate 14-22 AWG conductors. The M490 operates within an ambient temperature range of 32 F to 120 F (0 C to 49 C) and is intended for compatible indoor commercial door applications.

Designed for integration with electronic access control and emergency egress systems, the Schlage M490 can be controlled by compatible card readers, keypads, access control panels, request-to-exit devices, and approved emergency release equipment. Electrical power maintains the magnetic lock's holding force, while interrupting power releases the armature and permits the door to open. The M400 Series features a symmetrical, non-handed magnetic lock design with a bayonet-style mounting system that supports installation on different door orientations. Compatible installation accessories include TJ490 top-jamb mounting hardware for inswinging doors, HDB490 glass door mounting brackets, and 490 Series filler plates and angle brackets for frames requiring additional mounting support. A double-door connector kit is also available for applications using two compatible single-door magnetic locks.

The Schlage Locknetics M490 meets ANSI/BHMA A156.23 Grade 1 performance requirements and carries manufacturer-documented listings to UL 294 for access control system units, UL 1034 for burglary-resistant electric locking mechanisms, and UL 10C for positive-pressure fire testing of door assemblies, along with applicable cUL and California State Fire Marshal approvals. The standard M490 provides electromagnetic locking without the integrated door monitoring functions supplied with the related M490P. Applications requiring a magnetic bond sensor, door position switch, or adjustable 0.5-30-second relock delay should specify the M490P configuration. Proper installation requires a compatible power supply, appropriate mounting hardware, and an egress release arrangement meeting applicable fire and building codes. With its 1,500 lb holding force, automatic dual-voltage operation, and Grade 1 construction, the M490 provides a high-strength locking solution for commercial access-controlled openings.