CQR Deedlock Slimline Double Magnetic Lock, Monitored, 272kgf per Door AEM20004

What this lock is for

A double lock looks after a pair of doors from one body fixed across the frame head. That keeps the fitting tidy, and each door gets its own magnet and holding force.

This CQR magnetic lock is the monitored version of the Deedlock slimline double. It suits an access control system where the controller needs to know more than whether power is present.

How it works

• Magnet and armature: a coil in the body becomes an electromagnet when powered and pulls a steel armature plate fixed to the door. Switch the power off and the door is free.
• Self-regulating voltage: the lock accepts 12V or 24V DC without you setting it, drawing less current at the higher voltage.
• Monitoring: a monitored lock gives a signal the controller can read, usually showing whether the door is properly held.

Where to use it

It belongs on double doors with moderate daily use, such as internal office and corridor doors. For heavy traffic, look at a larger lock rather than this slimline body.

Any door people use to leave a building needs extra thought. A magnetic lock on an escape route usually needs a fire alarm link and a release device, and that decision sits with whoever holds the fire strategy.

What the figures mean in practice

• 272kgf per single door: this is a nominal holding force with the armature flat against the magnet, and it applies to each door rather than to the pair.
• Up to 70% on brackets: a bracket will typically reduce the holding force by up to this much, because a bracket flexes. Fit directly to the door where you can.
• 1000mA at 12v: size the supply for the whole door, including the controller and any release devices, then add a margin.

Installing it

• Check the opening: outward-opening doors usually take the lock and armature directly, while inward-opening doors usually need brackets.
• Choosing a bracket: CQR offers the SLM/ZL and SLM/L brackets and the SLM/AH armature housing for this range. Check how many a double needs before ordering.
• Safety straps: CQR also offers AEM/STRAPS, which stop the magnet falling from the door frame if it comes away from the mounting.

Planning your system

The lock is one part of the door. The job also needs a controller or door entry system, a DC power supply, a way to release the door from inside, and cable with monitoring cores.

Decide early whether the lock must hold during a mains cut. If it must, the supply needs battery back-up, and the release arrangements on escape routes still have to work.

Standards and ratings explained

TS010 is the Doors and Hardware Federations technical standard for electro-magnets, in the 2019 version CQR tested against. This lock is rated TS010 Grade 2.