4A79 - Electronic Slam Action Cell Lock



To provide secure locking of swinging cell doors controlled by Atlas® LCMS software or conventional key control when automatic deadlocking is a requirement. Atlas® LCMS software provides a range of operating functionality which can be configured to suit each site.


The 4A79 is a surface mounted lock of robust construction based on the Chubb Locks Custodial Services standard cell lock footprint. The main bolt is automatically extended providing a throw of 32mm and deadlocked on closure of door.

  • Electronic Mode - Deadlocking is achieved when the door is closed and the bolt fully extended. Unlocking is achieved by inserting an electronic token (key) into the lock. After authentication an input signal is provided to lift the blocking device that permits withdrawing the bolt via the handle. The bolt remains retracted when fully withdrawn and out of frame. The lock can also be configured to provide features such as anti-shut in and cell check functions. Additionally remote operation can be achieved via Atlas® Client / Mimic PC.
  • Manual Mode - Locking/unlocking is achieved using conventional (mechanical key). Bolt withdrawal by handle. Key operates from corridor side only.
  • Manual Override - In the event of power or communication failure an override key is used to lift the electric locking unit. Both keys are supplied to a different combination and are clearly identified.


Solid Case Technology; Lock case machined from single piece carbon steel.

  • Steel main bolt, with carbide anti-cutting rollers, and 32mm throw.
  • Solenoid electric locking latch.
  • Visual lock status indication via integral LED.
  • Intelligent lock which will continue to operate in the absence of LCMS server.
  • Independent 7-lever locking mechanism.
  • Factory restricted key section.
  • Integral door in frame sensor.
  • 5 bolt secure fixing.
  • Integral baffle arrangements to resist manipulation and interference via the keyhole.


  • Mechanical locking mechanism tested to a minimum of 100,000 operations.
  • Handle mechanism tested to a minimum of 300,000 bolt operations
  • Solenoid locking unit tested to a minimum of 1,000,000 cycles.
  • Solenoid arrangement designed to operate at +/-10% of 24V DC regulated supply.
  • Nominal operating current 500mA .
  • Saw attack 12 hours
  • End load 13.5 kN
  • Side Load 25 kN

Additional Features

  • Anti-Ligature handle and escutcheon design.
  • Range of fixings including backplates, stud fixings, locking plate and keeps.
  • Interchangeable mechanical inner locking unit to enable re-coding.

Total Range

  • The lock is available in left or right hand variants for opening in or opening out doors and can be fitted to steel or wooden doors.

Dimensions & Weights

Case Height286mm
Case Length267mm
Case Thickness30mm
Bolt Throw32mm
Bolt Depth45mm
Bolt Thickness22mm
Weight (lock only)12kg



  • Lock case - carbon steel electro-plated and powder coated exterior.
  • Main bolt - carbon steel electro-plated.
  • Main bolt follower high tensile brass.
  • Keys - Hardened Steel
  • Levers and springs - Brass / phosphor Bronze.