3L217.001 - Mortice electro-mechanical cell lock with DIF sensor



Latch bolt lock to provide electric locking / unlocking of swinging cell doors. The lock is designed to accept an input signal from a third party access control system to energise and disengage the locking solenoid. The lock provides a 'Secure' status output when the door is in frame and the latch bolt is extended and locked. All other states produce an 'Insecure' status output.

The lock is fitted with a Chubb 5 lever anti-pick mechanism with a factory restricted key profile or as an option Chubb 7 lever master keyed locking unit. The key is supplied to allow the lock to be mechanically secured and monitored.


The 3L217 is a morticed lock of robust construction. The latch bolt is automatically extended providing a throw of 25mm and electrically deadlocked when the latch bolt is fully extended and door inframe. The latch bolt cannot be electrically locked back when fully withdrawn.

Electrical Mode

Deadlocking is achieved when the door is closed and the latch bolt is fully extended and the solenoid locking bolt is energised +24 Volt DC to engage. Unlocking is achieved by de-energising the 24 Volt DC supply from an external source to lift the locking solenoid and withdrawing the bolt via the handle.
The solenoid is designed to be continuously energised to maintain the locked state when the door is in frame.

Manual Override

The lock is not provided with a manual override. If power fails the locking solenoid will automatically disengage.

Standard Features

  • Integral Door in Frame (DIF) sensor (Typically 3 to 6mm working range)
  • Unique single solenoid electric locking latch.
  • Independent 5-lever locking mechanism.
  • Locks can be keyed alike or keyed to differ
  • Factory restricted key section.
  • Status output - secure / insecure, door inframe and mechanical locking status.
  • Pick resistant mechanism with protective curtain.

Additional Features

  • Handle and escutcheon design to suit customer requirements (not supplied with lock).
  • Interchangeable mechanical inner locking unit to enable re-coding.
  • Door cable available in 3M or 10M lengths (not supplied with lock).
  • This lock can be supplied in groups keyed alike.
  • Master keyed option using Chubb 7 lever mechanism.



Materials and Finishes

  • Lock case - Carbon steel to BSEN10027-S275JO Zinc plate & Passivate to CM5 M1047
  • Lock cap - Carbon steel to BSEN10083-C22E Zinc plate & Passivate to CM5 M1047
  • Lock forend -  Stainless steel to BSEN10088:1.4016 Natural
  • Latch bolt - Carbon steel to BSEN10083-C22E Zinc plate & Passivate to CM5 M1047
  • Keys - High tensile brass to BSEN12164:CW721R Natural

Additional Items / Furniture

  • Key Escutcheon - Stainless steel to BSEN10088:1.4404
  • Knob & Fixing Rose - Aluminium to BSEN 754-755:6082 T6 - Polished and plated.
  • Locking Plate - Carbon steel to BSEN10130:FeP01 Zinc plated & Passivated to CM5 M1047
  • N35 Magnet - BN017A 6MM X 25MM
  • Lock Installation Cable - 3 or 10 metre (or custom length to suit)



  • Mechanical override mechanism tested to a minimum of 60,000 operations
    BS5872:1980 Part A.14.1
  • Handle mechanism tested to a minimum of 100,000 bolt operations
    BS EN 12209:2003 Part 5.3.2
  • Slam operations tested to a minimum of 300,000 operations
    BS EN 12209:2003 Part 5.3.2
  • Solenoid locking unit tested to a minimum of 500,000 cycles. pr
    EN 14846 Part
  • Main bolt saw attack 12 hours
    BS EN 12320:2001 Part 5.10.1
  • End load 8KN
    BS EN 12209:2003 Part 5.8.4
  • Side Load 15 KN
    BS EN 12209:2003 Part 5.8.2
  • Salt spray 96 hours
    ISO 9227:1990 / BS EN 1670:1998 Part 5.6
  • Temperature testing -20° / + 80°C
    BS EN 12209:2003 Part 5.7.2
  • Humidity testing 168 hours
    BS 3900 Part F2