Alpro EMS1200 Shear Lock | Monitored | 1200kg

High Security Alpro Shearlock For Internal Doors

The EMS1200 Alpro shearlock is a high performance electric locking solution designed for internal doors where security, clean aesthetics, and reliable operation are essential. This compact magnetic shear lock is built for high-traffic environments. It offers up to 1200kg of holding force and has been cycle tested to 500,000 operations.

This model is mortice-mounted for a flush, concealed installation and includes a built-in PCB controller and 3m lead for a faster fit. 

Key Product Features:

• MPN: EMS1200
• Magnetic shear lock for internal doors
• Operating voltage: 12V DC -10% to 24V DC +15%
• Current draw (activation): 1150mA @ 12V, 1550mA @ 24V
• Current draw (hold): 290mA @ 12V, 160mA @ 24V
• Mortice mounted
• Shear holding force 1200kg 
• High physical security
• Compact with slimline design
• Horizontal installation
• Single or double action doors
• CE marked
• Built in PCB controller
• Plug in 3m flying leads
• Switch selectable adjustable time delay 0-30 secs
• Multiple auto relock x100
• Cycle tested to 500,000 operations
• Armature pull-in gap: 4mm @ 12V DC, 5mm @ 24V DC
• Magnet dimensions: 163mm x 30mm x 35mm
• Armature dimensions: 163mm x 30mm x 32mm

Discreet Electric Locking for Modern Interiors

The EMS1200 shear lock combines high security with a low visual impact. It suits commercial interiors, office doors, and other controlled areas where exposed surface hardware is not appropriate. The mortice design allows the lock body to sit flush within the frame, helping maintain door aesthetics while reducing the risk of tampering.

The lock operates in shear, which increases resistance to forced entry when correctly installed. If your door requires a higher holding force, the surface mounted Alpro Vortex maglock offers up to 1500kg and provides a practical alternative.

Shear Lock with Built-In Monitoring and Auto Relock

The EMS1200 includes a PCB controller with door status monitoring and auto relock functionality. The lock will attempt to re-engage up to 100 times if misalignment occurs during closing. Once the armature is correctly positioned, the lock secures the door as intended. If engagement is not achieved after 100 attempts, opening and re-closing the door will reset the system.

This helps maintain security where door alignment may vary and reduces the risk of the door being left unsecured.

Installing the Alpro EMS1200 Shear Lock

The following guidance will help during installation. The downloadable fitting instructions are available in the product documents section.

Alignment Guidance

Make sure the magnet and armature are aligned correctly to support smooth shearlock operation.

• Maximum gap between magnet face and armature:

          4mm at 12V DC

          5mm at 24V DC

• Minimum clearance between shear pins and armature: 1mm
• Mounting position: horizontal only (not suitable for vertical installation)

If you need a vertically mounted electric lock, then consider the Alpro DB25 deadlocking bolt.

Power Supply 

• Use a regulated DC power supply unit (minimum 2A per shear lock)
• Position the PSU as close to the lock as possible to reduce voltage drop

Cabling 

The EMS1200 is supplied with a 3m cable, which should be used as part of the installation. If additional length is required:

• Use multi-core stranded alarm cable 
• Double or treble cores on longer runs to minimise voltage drop
• Do not use solid core telephone cable

Alpro EMS1200 for Reliable Shear Locking Where It Matters

The Alpro EMS1200 is a practical choice where secure, concealed locking is required without compromising door design. It suits high-traffic areas where doors need to lock reliably every time they close, even where alignment can vary slightly through regular use.

The combination of monitored status, auto relock, and high shear holding force supports controlled access across commercial and restricted environments. The Alpro EMS1200 shear lock provides consistent, dependable locking performance.