Trapped-key interlocks are widely used to ensure safe access to potentially live or dangerous plant or equipment in an industrial setting. A safe sequence of operations is enabled through transfer of keys …

Mar 18, 2024 · Explore how trapped key interlocks can enforce safer access and energy isolation through controlled key exchange in industrial settings.

Sep 30, 2024 · Trapped Key Interlocking, also called key-transfer interlocking, is a system of mechanical locks installed on gates, valves, etc. The system relies on transferring a master interlock key from a …

Quickly access technical specifications and installation instructions for Allen-Bradley Bulletin 440 trapped key safety interlock switches.

Trapped key interlocks provide mechanical safety control for machinery, ensuring secure access with coded keys—ideal for harsh and hygienic environments.

What is a trapped key interlock system? The use of interlock systems is a proven method for predominantly mechanical securing of machines and processes. Interlock systems are based on the …

Trapped key interlock systems are available in push-pull and rotary key styles (with and without solenoid locking). A trapped key system is cost-effective for multiple locks over a large area and eliminates …

Nov 7, 2025 · What is a Trapped Key Interlock System? At its core, a trapped key interlock system is a mechanical safety device designed to enforce a predetermined sequence of events. It works on the …

What is a Trapped Key Interlock? A trapped key interlock is a safety device applied to two or more moveable parts, preventing (or allowing) a movement or operation of one part only when another part …

mGard mechanical trapped key interlocks provide robust safety for hazardous energy isolation, process control, and trapped key systems.