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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

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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-T11420 440K Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440K-T11420 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11420Product Overview Allen-Bradley 440K-T11420 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...

    $211.11
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  • Allen-Bradley 440K-T11419 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11419 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11419Product Overview Allen-Bradley 440K-T11419 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...

    $292.50
    Ask for Quote
  • Allen-Bradley 440K-T11418 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11418 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11418Product Overview Allen-Bradley 440K-T11418 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...

    $187.50
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  • Allen-Bradley 440K-T11417 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11417 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11417Product Overview Allen-Bradley 440K-T11417 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...

    $300.00
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  • Allen-Bradley 440K-T11416 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11416 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11416Product Overview Allen-Bradley 440K-T11416 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...

    $180.00
    Ask for Quote
  • Allen-Bradley 440K-T11415 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11415 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11415Product Overview Allen-Bradley 440K-T11415 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...

    $240.00
    Ask for Quote
  • Allen-Bradley 440K-T11414 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11414 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11414Product Overview Allen-Bradley 440K-T11414 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...

    $277.50
    Ask for Quote
  • Allen-Bradley 440K-T11413 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11413 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11413Product Overview Allen-Bradley 440K-T11413 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...

    $240.00
    Ask for Quote
  • Allen-Bradley 440K-T11412 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11412 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11412Product Overview Allen-Bradley 440K-T11412 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...

    $240.00
    Ask for Quote
  • Allen-Bradley 440K-T11411 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11411 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11411Product Overview Allen-Bradley 440K-T11411 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...

    $277.50
    Ask for Quote
  • Allen-Bradley 440K-T11410 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11410 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11410Product Overview Allen-Bradley 440K-T11410 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...

    $255.00
    Ask for Quote
  • Allen-Bradley 440K-T11409 440K Interlock New Surplus
    In Stock

    Allen-Bradley

    Allen-Bradley 440K-T11409 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11409Product Overview Allen-Bradley 440K-T11409 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...

    $504.45
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