Solenoid interlock Fortress Interlocks

mGard is the premier range of modular robust trapped key interlocks for heavy duty applications. Trapped key interlocking is a tried and tested method of mechanically safeguarding dangerous machines and hazardous processes, and is suitable for category 4 (EN 954-1) applications. It is called "Trapped Key" as it works by releasing and trapping keys in a predetermined sequence. After the control or power has been isolated, a key is released that can be used to grant access to individual or multiple doors.


The principles of trapped key technology apply to all industries where it is essential that all energy sources are isolated before gaining access to machinery. Almost all safety issues can simply be solved by selecting the required products in the following order


- Power/Control isolation

- Key exchange units

- Door locks & actuators


Benefits of mGard


- No wiring on the installation

- Pattented runner bar system

- Pure mechanical configurations can be used in ATEX zones 1,2

- Create pre-determined safety procedures

- Designed for use in harsh environments (dust moisture and vibration)

- Robust heads and actuators and handles (with missallignment)

More specifications...