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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

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-T11404 440K Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440K-T11404 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11404Product Overview Allen-Bradley 440K-T11404 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
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  • Allen-Bradley 440K-T11403 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11403 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11403Product Overview Allen-Bradley 440K-T11403 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
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  • Allen-Bradley 440K-T11399 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11399 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11399Product Overview Allen-Bradley 440K-T11399 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-T11398 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11398 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11398Product Overview Allen-Bradley 440K-T11398 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-T11397 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11397 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11397Product Overview Allen-Bradley 440K-T11397 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...

    $157.50
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  • Allen-Bradley 440K-T11396 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11396 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11396Product Overview Allen-Bradley 440K-T11396 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-T11395 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11395 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11395Product Overview Allen-Bradley 440K-T11395 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-T11394 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11394 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11394Product Overview Allen-Bradley 440K-T11394 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-T11393 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11393 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11393Product Overview Allen-Bradley 440K-T11393 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-T11392 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11392 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11392Product Overview Allen-Bradley 440K-T11392 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-T11391 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11391 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11391Product Overview Allen-Bradley 440K-T11391 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-T11390 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11390 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11390Product Overview Allen-Bradley 440K-T11390 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
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