Interlocking solutions for access control in robot applications

Automation plays an important role in modern industrial environments. Robots can handle large and heavy components and speed up processes, but there are instances where personnel still need to access the areas where they operate.

Unrestricted or unauthorised access exposes operators to crushing and impact hazards, potentially leading to severe or fatal injuries. To mitigate these hazards, safeguarding solutions like interlocked guards are essential. Operators should only enter the safeguarded space once the hazards have reached a safe state.

AIC has been using amGardpro interlocks from Fortress to control access to its robot machines for over a decade. Access to the cell is allowed only after the robot has reached a controlled stop. The process involves halting the robot's activity after its cycle is complete and confirming the safety status before access is permitted. The interlock's solenoid locking mechanism holds the movable guard in a locked state. When required, operators can request to enter, and once the robot is in a safe state, the interlock is unlocked, allowing access to the cell.

The use of network-enabled solutions that can communicate with PROFINET and EtherNet/IP protocols allows simplified wiring, better diagnostics, and faster commissioning, all without compromising on the robustness required in steel plant environments.

Interlocks from Fortress also provide the possibility to include additional features, such as pushbuttons, emergency stops, and escape releases to allow operators to exit in case they inadvertently become trapped inside. With the help of Fortress, AIC now safeguards multiple robot applications installed across the world.

Meeting the safety needs of an evolving industry

As automation utilising robots becomes more advanced and widespread, there is a need for robust and flexible solutions to help keep operators safe. Through the adoption of networked interlocks from Fortress, it is possible to achieve improved safety, faster commissioning, and simplified maintenance.

These solutions show how advanced access control technology can meet the growing safety demands of heavy industries, protecting operators without compromising productivity.