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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-T11366 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11366 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11366Product Overview Allen-Bradley 440K-T11366 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-T11365 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11365 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11365Product Overview Allen-Bradley 440K-T11365 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-T11364 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11364 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11364Product Overview Allen-Bradley 440K-T11364 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-T11363 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11363 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11363Product Overview Allen-Bradley 440K-T11363 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...

    $217.50
    Ask for Quote
  • Allen-Bradley 440K-T11341 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11341 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11341Product Overview Allen-Bradley 440K-T11341 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-T11340 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11340 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11340Product Overview Allen-Bradley 440K-T11340 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-T11339 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11339 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11339Product Overview Allen-Bradley 440K-T11339 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-T11338 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11338 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11338Product Overview Allen-Bradley 440K-T11338 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
    Ask for Quote
  • Allen-Bradley 440K-T11337 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11337 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11337Product Overview Allen-Bradley 440K-T11337 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-T11336 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11336 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11336Product Overview Allen-Bradley 440K-T11336 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-T11333 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-T11333 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11333Product Overview Allen-Bradley 440K-T11333 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-T11326 440K Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440K-T11326 440K Interlock (Refurbished)

    About Allen-Bradley 440K-T11326Product Overview Allen-Bradley 440K-T11326 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
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