Fortress Interlocks: Protecting People, Protecting Productivity

Fortress Interlocks has over 40 years of experience in the safety market, designing and manufacturing safety access and control systems from its headquarters in Wolverhampton in the UK. Its mission is simple: protecting people, protecting productivity.


A world leader in networked access control systems, Fortress’ technology helps create safer workplaces where employees in industrial environment are safeguarded from injury, equipment is protected from damage, and productivity is enhanced. The company’s products ensure that actions and events are undertaken in a pre-determined sequence, ensuring a safe working environment.

The company’s products are suitable for an extremely wide range of industrial applications, including power generation and distribution, iron and steel, automotive manufacturing, food and beverage, recycling, building and construction, robotics and palletisers. Its extensive produce offering and experience means Fortress can provide solutions for all safeguarding applications. It also regularly provides bespoke products for unique applications, often by customising its standard product range.

Fortress is also developing networked versions of its products, utilising the AS-i and PROFIsafe protocols. This ensures the company not only meets, but exceeds, what manufacturers now expect when it comes to industrial networking.

Fortress offers three types of product in its portfolio:
• amGardpro – the ultimate range of modular safety gate switch interlocks for heavy duty applications. Its unique modular construction allows easy configuration and provides total electro-mechanical safeguarding for practically any application up to SIL3 (EN/IEC 60261) Category 4, and PLe (EN/ISO 13849-1). The amGardpro range (including the amGardnct non-contact switches) has TÜV certification for Europe and North America. It now also has a proNET communications module, utilising the PROFINET protocol and its extension PROFIsafe.
• mGard – the premier range of robust, modular trapped-key interlocks for heavy duty applications. Trapped key interlocking is a tried and tested method of mechanically safeguarding dangerous machines and processes, which works by trapping and releasing in a predetermined sequence. Once control or power has been isolated, a key is released that can then be use to gain access to individual or multiple doors. mGard is suitable up to SIL3 (EN/IEC 62061) Category 4, and PLe (EN/ISO 13849-1). mGard also has TÜV certification for Europe and North America.
• tGard – this offers total integration of control and safety. The newest addition to Fortress’ product range, it is totally customisable as standard. Its unique design allows the configuration of safety gate switches, trapped key interlocks and machine control stations – or any configuration of all three. Elements are housed in a metal body, created a simple and robust safety system. As with the amGardpro and mGard, tGard also has TÜV certification for Europe and North America.

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