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Position switches with guard locking, also known as safety interlock switches or trapped-key interlocks, are critical components in industrial safety systems. These devices integrate a mechanical locking mechanism that prevents access to hazardous machinery until safe conditions are met. Typically featuring a positive-break normally closed (NC) ...
Position switches with guard locking, also known as safety interlock switches or trapped-key interlocks, are critical components in industrial safety systems. These devices integrate a mechanical locking mechanism that prevents access to hazardous machinery until safe conditions are met. Typically featuring a positive-break normally closed (NC) contact and multiple auxiliary contacts, they are designed for 3P or 4P configurations with rated operational currents up to 10A at 400V AC. The guard locking mechanism can be solenoid-actuated (spring-locked or power-to-lock) or mechanically coded, ensuring compliance with ISO 14119 and IEC 60947-5-1 standards. Mounting options include flush or surface mounting with IP67 protection for harsh environments.
These switches are primarily used in industrial automation for guarding machine tools, robotic cells, packaging lines, and conveyor systems. They are installed on safety doors, gates, or covers in sectors like automotive manufacturing, food processing, and material handling. The guard locking function ensures that the machine cannot operate unless the guard is closed and locked, and the guard cannot be opened until the machine is safely stopped, aligning with risk assessment requirements per EN 62061 and ISO 13849.
Key subcategories include solenoid-locking switches (e.g., series with codes like GS-...-... or AZM...), mechanical trapped-key interlocks (e.g., TVS... or MGB...), and modular safety switches with integrated RFID coding. Typical article codes follow patterns like "AZM161SK-12/10RKA-024" or "GS-1-2-3-4", where digits indicate locking type, contact configuration, voltage, and actuator style. Main articles often include variants for 24V DC or 110V AC solenoids, with or without emergency stop buttons.
Electric Automation Network offers global express shipping and dedicated engineering support for these safety-critical components. Our engineers provide personalized assistance for selecting the right guard locking switch based on your machine's risk level, actuator type, and wiring requirements. We supply detailed technical documentation, real-time pricing, and cross-reference support for legacy systems, ensuring seamless integration into your safety circuit.
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