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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.

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    Allen-Bradley

    Allen-Bradley 440K-T11456 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11456Product Overview Allen-Bradley 440K-T11456 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...

    $195.00
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  • Allen-Bradley 440K-T11455 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11455 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11455Product Overview Allen-Bradley 440K-T11455 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...

    $210.00
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  • Allen-Bradley 440K-T11454 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11454 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11454Product Overview Allen-Bradley 440K-T11454 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-T11453 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11453 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11453Product Overview Allen-Bradley 440K-T11453 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...

    $142.50
    Ask for Quote
  • Allen-Bradley 440K-T11452 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11452 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11452Product Overview Allen-Bradley 440K-T11452 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...

    $165.00
    Ask for Quote
  • Allen-Bradley 440K-T11451 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11451 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11451Product Overview Allen-Bradley 440K-T11451 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...

    $210.00
    Ask for Quote
  • Allen-Bradley 440K-T11450 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11450 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11450Product Overview Allen-Bradley 440K-T11450 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...

    $165.00
    Ask for Quote
  • Allen-Bradley 440K-T11449 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11449 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11449Product Overview Allen-Bradley 440K-T11449 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
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  • Allen-Bradley 440K-T11448 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11448 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11448Product Overview Allen-Bradley 440K-T11448 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...

    $172.50
    Ask for Quote
  • Allen-Bradley 440K-T11447 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11447 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11447Product Overview Allen-Bradley 440K-T11447 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-T11446 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11446 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11446Product Overview Allen-Bradley 440K-T11446 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
    Ask for Quote
  • Allen-Bradley 440K-T11445 440K Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440K-T11445 440K Interlock (New Surplus)

    About Allen-Bradley 440K-T11445Product Overview Allen-Bradley 440K-T11445 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
    Ask for Quote
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