CDVI 300kg Maglock, Mortice Mount, Monitored, Fail Safe C3M11

What this mortice maglock is for

Some doors look wrong with a magnet box on the frame. A mortice maglock answers that by sitting in a recess, so the lock is far less visible once the door is closed.

This one suits access control installers on projects where appearance matters. It also suits building owners who want a lock with no latch to wear.

How a maglock works

• Electromagnet: a coil in the lock body becomes a magnet when powered, and pulls the armature plate on the door firmly against it.
• Fail safe: a magnet only holds while it has power, so the door is free once the lock loses power. That is why the wiring and power plan matter as much as the lock.
• Monitored: the single relay gives NO (normally open) and NC (normally closed) contacts, which can be wired to a controller input to show lock status.

The access control system guide explains how fail safe and fail secure locks differ, and why that choice comes first on any door.

Where to use it

It suits high traffic areas, because no moving parts means no latch to wear. Its -40°C to 70°C range covers any normal UK building.

Treat IP54 as the guide to exposure, and check with CDVI before fitting it outside. On an escape route, settle how a fail safe lock will release before you cut anything. Check the plan with whoever holds the building's fire strategy.

What the figures mean in practice

• Up to 300kg holding force: this is the straight pull the magnet resists with the armature flat against it. Poor alignment reduces it, and the frame must be strong enough to carry the load.
• 285mA @ 12Vdc or 145mA @ 24Vdc: a maglock draws this current for as long as the door is locked. Running at 24Vdc roughly halves it, which makes long cable runs easier.
• 1.75 kg: this is the weight, so plan fixings that can carry it.

Installing it

• Recess: the maglock measures 228 x 38.5 x 27.3 mm. Mark out from CDVI's fitting instructions before cutting the frame.
• Armature plate: it measures 185 x 38 x 11 mm and fixes to the door, so check the door's construction can take the fixings.
• Brackets: The AMB300 flush armature bracket for 300kg magnets is CDVI's accessory for this lock. Other maglock brackets and accessories suit other door layouts, so match them to your door before ordering.
• Wiring a maglock: as a rule, take the power pair through the release device, then take the relay pair back to a monitoring input.

Planning your system

A complete door also needs a controller, a way out and a 12-24Vdc supply sized for the lock's constant draw. Most sites add an exit button on the secure side and an emergency door release at the door, and choose an access control power supply with the escape-route release in mind.

The magnetic door lock guide covers holding force, air gap and frame strength in more depth.

Ratings explained

• IP54: the first digit means dust protected, and the second means protected against splashing water.
• IK10: this is an impact rating, and the top of the common IK scale.
• 100kg pre-load: this relates to FR regulation NFS 61-937, so check what applies to your UK project.