Mechanical Trapped Key Interlocks

Trapped key interlocking is versatile, robust and can be used to solve complex safety sequences, particularly where multiple energy sources exist. Electrical, pneumatic, hydraulic, and kinetic energy sources can all be interlocked using mGard products, and typically at a fraction of the cost of alternative solutions.

Fortress mGard products are designed, tested and TUV approved for use in Category 4/PLe safe control systems. A single Fortress interlock does not require additional safety components added to meet PLe.

All mGard systems can be designed to incorporate safety, or personnel keys, an ideal solution for whole body access requirements, and one that is recommended in multiple international machinery safety standards.

mGard is particularly effective in reducing installation cost, by reducing wiring, whilst not reducing safety performance.

ISO/TS 19837:2018 is the technical specification relating to trapped key interlocking, our mGard range is designed to meet or exceed all requirements. Fortress keeps a database of all keys and locks and their locations to prevent the unintentional duplication of key codes at a location, regardless of the original purchaser.