Key Interlocks

The Key Interlocks category covers trapped-key interlock systems and solenoid release units designed to enforce safe sequences of operation in industrial machinery and hazardous-area access control. These devices physically prevent unsafe actions — such as energizing equipment while a guard door is open, or accessing a danger zone before a machine has reached a safe state — by linking key transfer to electrical switching logic. Typical product types include single solenoid release units, multi-solenoid (dual and triple) release assemblies, and key exchange modules with configurable N.O./N.C. contact arrangements rated for 20A or higher. Controls engineers, machine builders, and safety system integrators specify key interlock solutions for press guarding, robotic cell access, energy isolation, and lockout/tagout-adjacent machine safeguarding applications where IEC 60947 or ISO 14119 compliance is required.