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The LK-M012L is a surface-mounted magnetic lock designed for security applications, offering a robust 1200 lbs holding force. This device is part of a series that provides dual voltage operation (12 or 24 VDC) and features low current consumption, making it energy efficient. Its construction includes an anodized aluminum housing, and it is equipped with a built-in voltage spike suppressor to protect against electrical surges. A key feature of the LK-M012L is its ability to prevent residual magnetism, ensuring reliable and quick release of the lock when power is disengaged.
The lock is available in versions that include monitored status output, which allows for remote monitoring of the lock's state (locked or unlocked), and timer versions, which provide adjustable delay for locking or unlocking. To accommodate various installation scenarios, different types of brackets and housing are available. The LK-M012L is compliant with several international standards, including EN55011:1998 Class B, EN60601-1-2:2002, EN61000-4-2:1995, EN61000-4-3:2002, and UL-S5351, indicating its adherence to electromagnetic compatibility, medical electrical equipment safety, electrostatic discharge, and radio-frequency electromagnetic field immunity standards, as well as general safety requirements.
The installation process for the LK-M012L requires careful handling to avoid damaging the mating surfaces of the magnet or armature plate, which could reduce locking efficiency. The magnet component is designed to mount rigidly to the door frame, while the armature plate mounts to the door with hardware that allows it to pivot. This pivoting mechanism is crucial for compensating for door wear and misalignment, ensuring optimal contact with the magnet and consistent locking performance. A template is provided to ensure accurate placement of the armature plate when the door is in its normally closed position.
When fixing the armature plate, it is important not to overtighten it. The use of a rubber washer is recommended to make the armature plate more flexible, allowing it to automatically adjust its proper position with the magnet for optimal engagement. The installation process also advises adding thread locker to all screws and tightening them firmly to prevent loosening over time.
For wiring, the unit should only be powered by a UL listed power supply. Correct wiring involves connecting the ground (-) lead from the power source to Terminal 2 and the positive (+) lead to Terminal 1. It is important to wire the power switch between the DC source voltage and the magnet. If the power switch is not wired in this manner, the magnet may take longer to de-energize, simulating residual magnetism. The device includes a jumper to select between 12 VDC and 24 VDC operation, which must be set correctly according to the power supply used.
For integration with other systems, the LK-M012L provides relay dry contacts. If a normally open switch is required, wires from the system should be connected to terminal 4 and terminal 3. For a normally closed switch, connections should be made to terminal 4 and terminal 5. These contacts allow the lock to interface with access control systems, alarms, or other security devices.
The design of the LK-M012L, with its anodized aluminum housing and built-in voltage spike suppressor, contributes to its durability and reduces the need for frequent maintenance. The ability of the armature plate to pivot and self-adjust helps maintain optimal performance despite door wear, minimizing the need for manual adjustments. The absence of residual magnetism ensures that the lock releases cleanly, preventing issues that could arise from sticky or delayed unlocking. Regular checks of screw tightness and wiring connections are recommended to ensure continued reliable operation. The robust construction and adherence to international standards suggest a long operational life with minimal maintenance requirements.
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