In Stock Industrial Automation Parts   |   Fast Shipping Across USA

Interlocks & Guard Switches

Interlocks and Guard Switches (Industrial Machine Safety Interlocking)

Interlocks and guard switches are critical components in industrial machine safety systems. These devices monitor the position of safety gates, guard doors, and protective barriers to ensure machinery operates only when safe conditions are met. When a guard is opened or removed, the interlock switch signals the safety circuit to stop machine motion and prevent hazardous operation.

Industrial interlocks are widely used in automated production lines, packaging equipment, robotic cells, conveyors, and assembly systems. Using the correct interlock series ensures compatibility with existing machine guarding hardware and helps maintain reliable safety performance in demanding industrial environments.

This category includes refurbished interlock switches and guard monitoring devices used for maintenance replacement and spare inventory. Maintaining compatible replacement hardware allows facilities to repair machines quickly and minimize production downtime.

Typical interlock applications

  • Safety gate monitoring for robotic cells
  • Guard door monitoring on packaging equipment
  • Access control for automated production lines
  • Protective enclosure monitoring for hazardous machinery
  • OEM machine safety integration

Shop by interlock series

Related categories

When replacing an interlock device, verify mounting orientation, actuator compatibility, electrical connections, and application requirements before installation to ensure the safety system functions correctly.

  • Allen-Bradley 440NS32047X 440N Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440NS32047X 440N Interlock (New Surplus)

    About Allen-Bradley 440NS32047XProduct Overview Allen-Bradley 440NS32047X is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $420.00
    Ask for Quote
  • Allen-Bradley 440N-S32047 440N Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440N-S32047 440N Interlock (New Surplus)

    About Allen-Bradley 440N-S32047Product Overview Allen-Bradley 440N-S32047 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $625.00
    Buy Now
  • Allen-Bradley 440NS32046X 440N Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440NS32046X 440N Interlock (New Surplus)

    About Allen-Bradley 440NS32046XProduct Overview Allen-Bradley 440NS32046X is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $20.00
    Ask for Quote
  • Allen-Bradley 440N-S32046 440N Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440N-S32046 440N Interlock (New Surplus)

    About Allen-Bradley 440N-S32046Product Overview Allen-Bradley 440N-S32046 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $433.75
    Buy Now
  • Allen-Bradley 440N-S32043 440N Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440N-S32043 440N Interlock (New Surplus)

    About Allen-Bradley 440N-S32043Product Overview Allen-Bradley 440N-S32043 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $667.88
    Buy Now
  • Allen-Bradley 440N-S32042 440N Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440N-S32042 440N Interlock (New Surplus)

    About Allen-Bradley 440N-S32042Product Overview Allen-Bradley 440N-S32042 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $696.98
    Buy Now
  • Allen-Bradley 440N-S32039 440N Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440N-S32039 440N Interlock (New Surplus)

    About Allen-Bradley 440N-S32039Product Overview Allen-Bradley 440N-S32039 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $352.55
    Buy Now
  • Allen-Bradley 440N-S32038 440N Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440N-S32038 440N Interlock (New Surplus)

    About Allen-Bradley 440N-S32038Product Overview Allen-Bradley 440N-S32038 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $305.00
    Buy Now
  • Allen-Bradley 440N-S32037 440N Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440N-S32037 440N Interlock (New Surplus)

    About Allen-Bradley 440N-S32037Product Overview Allen-Bradley 440N-S32037 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $172.50
    Ask for Quote
  • Allen-Bradley 440N-S32036 440N Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440N-S32036 440N Interlock (New Surplus)

    About Allen-Bradley 440N-S32036Product Overview Allen-Bradley 440N-S32036 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $548.80
    Buy Now
  • Allen-Bradley 440N-S32033 440N Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440N-S32033 440N Interlock (New Surplus)

    About Allen-Bradley 440N-S32033Product Overview Allen-Bradley 440N-S32033 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $312.55
    Buy Now
  • Allen-Bradley 440N-S32032 440N Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440N-S32032 440N Interlock (New Surplus)

    About Allen-Bradley 440N-S32032Product Overview Allen-Bradley 440N-S32032 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $171.00
    Buy Now
Compare Selected