Lockwood EMZ4-SM Electromagnetic Maglock Single 280kg Monitored 12/24VDC

Product SKU: 770300-012

Product Overview

The Lockwood EMZ4-SM Electromagnetic Maglock Single 280kg Monitored 12/24VDC is a compact yet powerful magnetic locking solution designed for access-controlled doors. Built for commercial installations, this surface-mounted electromagnetic lock delivers strong holding force and reliable fail-safe operation for secure door control. The EMZ4-SM integrates easily with modern access control systems such as card readers, intercoms and keypads, providing dependable electronic locking while maintaining smooth and silent operation for everyday use.

Why Choose the EMZ4-SM

The EMZ4-SM is designed to offer strong magnetic locking performance while remaining compact enough for a wide range of door types. With dual-voltage operation and monitored status outputs, it provides installers with flexibility when integrating into professional access control systems. Its self-aligning armature plate helps maintain consistent contact even when doors shift slightly over time, while silent operation ensures a smooth user experience. The maglock design also allows fast installation and dependable fail-safe unlocking during power loss, which is important for many life-safety door applications.

Key Capabilities

Key Features

• Dual Voltage 12VDC / 24VDC: The maglock supports both 12VDC and 24VDC power inputs, allowing installers to select the appropriate voltage during installation and integrate easily with different access control power supplies.

• Strong 280kg Holding Force: Designed to provide a strong magnetic bond between the lock body and armature plate, delivering dependable door security for commercial access-controlled environments.

• Integrated Bond and Door Monitoring: Monitoring sensors allow the system to confirm whether the magnet is energised and whether the door is properly closed, improving security management and alarm monitoring capability.

• Self-Aligning Armature Plate: The armature plate pivots slightly to accommodate door movement or minor door drop, helping maintain consistent magnetic contact and reliable locking performance.

• Instantaneous Release Technology: Internal electronics eliminate residual magnetism when power is removed, allowing the door to release immediately without sticking or delay.

• Fire Door Compatibility: The lock is suitable for installation on approved fire door assemblies, allowing it to be used in commercial environments where fire door compliance and access control must work together.

Specifications Summary

• Model: EMZ4-SM
• Product Type: Single electromagnetic maglock
• Holding Force: Up to 280kg
• Operation: Fail-safe (unlocks when power removed)
• Monitoring: Hall/bond monitoring and reed switch door monitoring
• Operating Voltage: 12VDC or 24VDC selectable
• Current Draw: 450mA at 12VDC / 225mA at 24VDC
• Dimensions: 238mm × 48mm × 27mm
• Mounting Type: Surface mount
• Door Type: Single door applications
• Construction: Aluminium body with steel armature plate
• Operating Temperature: Approximately −10°C to +55°C
• Compliance: Suitable for approved fire door assemblies

Ideal Use Cases

• Commercial Offices – Secure entry doors controlled by card readers or keypad systems.
• Healthcare and Education Facilities – Reliable access control for high-traffic doors requiring monitored locking.
• IT Rooms and Secure Areas – Ideal for doors protecting sensitive equipment or restricted areas.
• Glass or Aluminium Doors – Suitable for surface-mounted installations where traditional mortice locks are not practical.

FAQs

1. How does a magnetic door lock work?
   An electromagnetic lock works by energising a powerful electromagnet mounted on the door frame. When the door closes, the armature plate attached to the door is pulled firmly against the magnet, creating a strong magnetic bond that keeps the door securely locked. When power is removed, the magnetic force disappears and the door can open normally.
2. What does fail-safe operation mean for a maglock?
   Fail-safe means the lock releases when power is removed. This design is widely used for access-controlled doors because it allows occupants to exit safely during power failures or emergency situations. In many installations, fail-safe maglocks are combined with emergency break-glass units or backup power systems for additional safety.
3. What does monitored mean on the EMZ4-SM?
   Monitoring provides signals to the access control system indicating whether the lock is engaged and whether the door is closed. Bond monitoring confirms the magnet is securely holding the armature plate, while a reed switch can detect the door position. These signals help security systems detect faults, forced doors or doors left open.