CQR Deedlock Slimline Magnetic Lock, 600 lbf, Monitored, Single Door AEM20002

What this magnetic lock is for

A magnetic lock, or maglock, holds a door shut with an electromagnet on the frame and a steel plate on the door. There is no latch to wear or jam.

This slimline model suits inside doors on an access control system, where a compact body looks better than a full-size lock. The monitored version also lets the system know the door state.

How does a monitored maglock work?

• Magnet: when powered, a coil in the lock body pulls the armature plate firmly against it. Cut the power and the door is free.
• Monitoring: a monitored lock usually has a contact that changes state when the door is held, which goes back to a controller input. Check your unit's wiring instructions.
• Self-regulating: this means the lock adapts itself to a 12 or 24V DC supply.
• Indicator: the L shape light shows door status across 180°, which helps in a busy corridor or a hospital.

Where to use it

It is made for medium use traffic, which suits office doors, corridors and staff areas. For heavier use, look at a full-size lock in the wider range of maglocks.

On an escape route, settle how the lock will release before fitting it. That can change the wiring and the parts you need.

What the figures mean in practice

• 600 lbf (272kgf) nominal: this is a nominal figure for the magnet. A bracket will typically reduce the holding force on the door by up to 70%, because a bracket can flex.
• 500mA at 12v, 250mA at 24v: a magnetic lock draws current all the time it is locked, so add this to your supply load. Running at 24V halves the current.
• 2.0KG: check the frame head can carry the lock and its fixings.

Installing it

• Choosing a bracket: the SLM/L is the L bracket, the SLM/ZL is the Z&L bracket and the SLM/AH is the armature housing. The SLM/L/ARC and SLM/ZL/ARC are the architectural versions.
• Safety straps: the AEM/STRAPS are made to stop the magnet falling if it ever comes away from its mounting. That is worth considering over a busy doorway.
• Alignment: the plate must meet the magnet flat and square, because poor contact reduces holding force.
• Protect the controller: a magnet coil can give a voltage spike when it switches off. Fit any suppression your controller's instructions call for.

Planning your system

A complete door needs a keypad or reader, a controller, an exit button and a 12/24V DC power supply sized for the lock's constant draw.

On an escape route, a magnetic lock usually also needs a fire alarm link and an emergency door release, and any battery back-up should be sized with that in mind. Agree the design with whoever holds the fire strategy.

Standards and ratings explained

• TS010: this is the Doors and Hardware Federations technical standard for electro-magnets. This lock is rated Grade 2 to the 2019 edition.
• IP rating: check the unit's documentation before using it outside or in wet positions.