Alarm Controls 1200S Single Magnetic Lock, Standard, Bracket Mounted, 1200 lbs of Holding Force, Satin Aluminum, Clear Anodized

The Alarm Controls 1200S is a single-door electromagnetic lock with 1,200 pounds of holding force, field-selectable 12/24 VDC operation, and a clear anodized aluminum (US28) finish. Designed for commercial access control systems, it features instant release without residual magnetism, built-in arc suppression, and an E-Z mounting bracket system. The lock draws 505 mA at 12 VDC or 260 mA at 24 VDC and is UL 294 and UL 10C listed. Its bracket-mounted design supports secure installation on compatible commercial doors without requiring specialized installation tools.

Alarm Controls 1200S 1200 lb Single-Door Electromagnetic Lock

The Alarm Controls 1200S is a heavy-duty, surface-mounted electromagnetic door lock providing 1,200 pounds of holding force for commercial electronic access control applications. Manufactured by Alarm Controls, an ASSA ABLOY Group company, the 1200S is designed to secure a single door using an electromagnetic locking mechanism consisting of a frame-mounted magnet and a door-mounted armature plate. When electrical power is applied, the energized magnet attracts the armature plate to maintain the locked condition. Removing power immediately releases the magnetic bond, allowing the door to open. This fail-safe locking operation makes the 1200S suitable for appropriately designed access-controlled entrances requiring power-to-lock functionality. The lock features a standard clear anodized aluminum (US28) finish and is intended for high-traffic commercial applications, including office buildings, educational facilities, healthcare properties, industrial buildings, and controlled pedestrian entrances.

The Alarm Controls 1200S operates on 12 or 24 VDC with a field-selectable voltage switch, allowing installers to configure the lock according to the available access control power supply. Manufacturer specifications identify a current draw of 505 mA at 12 VDC and 260 mA at 24 VDC, with the voltage selector factory-configured for 24 VDC operation. The lock incorporates built-in arc suppression to help protect connected control equipment from electrical transients generated during switching. Its instant-release magnetic design eliminates mechanical bolt retraction and minimizes residual magnetic holding force after power is disconnected. Because the 1200S uses electromagnetic rather than mechanical locking, the magnet and armature assembly contains no conventional latchbolt or moving locking mechanism. The unit can be controlled through compatible access control panels, card readers, keypads, request-to-exit devices, and other approved switching equipment when connected to an appropriately rated power supply and release circuit. The standard 1200S does not include an LED indicator, magnetic bond sensor, or door position monitoring output; these capabilities are available on other models in the Alarm Controls 1200 Series.

The Alarm Controls 1200S features a bracket-mounted aluminum housing measuring 10-1/2 inches long, 2-7/8 inches high, and 1-1/2 inches deep. The accompanying armature plate measures approximately 7-1/4 inches long, 2-3/8 inches high, and 5/8 inch thick, according to the manufacturer's updated product literature. Its E-Z mounting system includes a header bracket, installation template, and self-drilling TEC screws to simplify installation on compatible hollow metal, wood, and aluminum-framed door assemblies. The armature plate uses a floating mounting arrangement with rubber and metal washers to maintain proper contact with the magnet when the door closes. For standard outswinging doors, the electromagnetic lock mounts to the door frame header, while the armature attaches to the door. Inswinging installations may require compatible Alarm Controls L- and Z-bracket accessories to position the magnet and armature correctly. Additional filler plates, drop-down plates, and mounting brackets are available to accommodate varying frame configurations. Non-aluminum components are plated for corrosion resistance, and the lock operates within a temperature range of 14 F to 131 F (-10 C to 55 C).

The Alarm Controls 1200S is designed for integration into commercial access control systems requiring a high-strength, fail-safe electromagnetic locking device. The manufacturer identifies the series as UL 294 listed for access control systems, UL 10C listed for fire-door applications, UL 864 listed for fire alarm applications, and compliant with applicable Canadian ULC-S104 and ULC-S527 requirements. These listings support installation in appropriately designed access-controlled door assemblies, subject to the requirements of NFPA 72, NFPA 101, applicable building and fire codes, and the authority having jurisdiction. Because the 1200S is a fail-safe magnetic lock, it releases when power is interrupted and must be connected to appropriate emergency release equipment where required. The standard model differs from the Alarm Controls 1200L, which adds an LED status indicator, and the 1200LB, which incorporates LED indication, magnetic bond monitoring, and door status sensing. The 1200S is supplied with a manufacturer limited lifetime warranty, subject to its published terms. Combining 1,200-pound holding strength, selectable dual-voltage operation, built-in arc suppression, corrosion-resistant construction, and straightforward bracket mounting, the Alarm Controls 1200S provides a durable electromagnetic locking solution for new commercial access control installations and compatible door security retrofits.