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 440K-T11175 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11175 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11175Product Overview Allen-Bradley 440K-T11175 is a refurbished 440K safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $150.00
    Ask for Quote
  • Allen-Bradley 440K-T11174 440K Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440K-T11174 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11174Product Overview Allen-Bradley 440K-T11174 is a refurbished 440K safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $298.71
    Buy Now
  • Allen-Bradley 440K-T11173 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11173 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11173Product Overview Allen-Bradley 440K-T11173 is a refurbished 440K 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 440K-T11172 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11172 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11172Product Overview Allen-Bradley 440K-T11172 is a refurbished 440K 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 440K-T11171 440K Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440K-T11171 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11171Product Overview Allen-Bradley 440K-T11171 is a refurbished 440K safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $226.10
    Buy Now
  • Allen-Bradley 440K-T11167 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11167 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11167Product Overview Allen-Bradley 440K-T11167 is a refurbished 440K 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 440KT11156 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440KT11156 440K Interlock (New Surplus)

    About Allen-Bradley 440KT11156Product Overview Allen-Bradley 440KT11156 is a refurbished 440K safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $105.00
    Ask for Quote
  • Allen-Bradley 440K-T11155 440K Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440K-T11155 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11155Product Overview Allen-Bradley 440K-T11155 is a refurbished 440K safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $178.20
    Buy Now
  • Allen-Bradley 440K-T11149 440K Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440K-T11149 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11149Product Overview Allen-Bradley 440K-T11149 is a refurbished 440K safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $370.50
    Buy Now
  • Allen-Bradley 440K-T11147 440K Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440K-T11147 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11147Product Overview Allen-Bradley 440K-T11147 is a refurbished 440K safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $300.58
    Buy Now
  • Allen-Bradley 440K-T11146 440K Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440K-T11146 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11146Product Overview Allen-Bradley 440K-T11146 is a refurbished 440K safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $245.10
    Buy Now
  • Allen-Bradley 440K-T11132 440K Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440K-T11132 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11132Product Overview Allen-Bradley 440K-T11132 is a refurbished 440K safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $324.88
    Buy Now
Compare Selected