The versatility of tGard
Configurable Access and Control in Industrial Safety using tGard
Machine safety requirements vary widely between applications. Some systems require simple guard monitoring, while others demand complex key exchange procedures or integrated control functions. The tGard range from Fortress Safety is designed to address this diversity by offering configurable interlocks and operator controls within a single, compact platform.
tGard: Modular safety in a 40 mm housing
At the core of tGard is a slim 40 mm metal body that can host up to ten modules. These modules include:
- Interlocks with or without guard locking
- Trapped key systems
- Escape releases
- Emergency stops, pushbuttons, and indicator lamps
- Selector and key switches
This modular approach allows users to configure a device that matches the functional requirements of a specific machine or production line. The system is available in eight body types, and mounting requires only two fixing points, making installation practical for both new and retrofit applications.
Safety performance and reliability of the metal safety switch
tGard is third-party certified for performance levels up to PLd/Cat. 3, or PLe/Cat. 4 when equipped with a High Level Coded RFID actuator. This actuator offers protection against tampering and misalignment, while providing OSSD or SSR outputs. For applications where entrapment is a risk, an escape release function ensures personnel can exit safeguarded spaces, even if the guard remains locked.
Integration of tGard with IO-Link Safety and AS-i
Beyond mechanical safeguarding, tGard supports modern safety communication protocols, such as IO-Link Safety and AS-I Safety. IO-Link Safety (IEC 61139-2) enables safe point-to-point communication with an IO-Link Safety Master.
- A single connector for power and data, reducing cabling and installation time.
- Real-time data access for monitoring device status, operating cycles, and diagnostics.
- Simplified device replacement, with automatic recognition and parameter restoration.
AS-i Safety is also supported, providing a straightforward option for integration into distributed or modular systems. These connectivity options allow tGard to function not only as a mechanical safety device but also as a data-enabled component in a wider safety architecture.
Application examples for the tGard range
The adaptability of tGard is illustrated in a range of practical use cases:
- Automotive assembly: key exchange systems ensure power isolation until all personnel keys are returned.
- Robotic palletisers: power-to-unlock solenoids prevent restart until operators have exited the safeguarded area.
- Automated conveyors: interlocks with guard locking and escape release provide safe access for clearing blockages while allowing emergency exit.
To conclude
tGard combines configurable hardware with modern communication standards, making it suitable for diverse industrial environments. Its modular design, certified safety performance, and integration with IO-Link Safety and AS-i provide engineers, buyers, HSE-managers, and comparative functions in the industry, with a practical and adaptable solution for machine safeguarding.
