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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-A17060 440K Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440K-A17060 440K Interlock (Refurbished)

    About Allen-Bradley 440K-A17060Product Overview Allen-Bradley 440K-A17060 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...

    $51.00
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  • Allen-Bradley 440K-A11238 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-A11238 440K Interlock (Refurbished)

    About Allen-Bradley 440K-A11238Product Overview Allen-Bradley 440K-A11238 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...

    $34.00
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  • Allen-Bradley 440K-A11144 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-A11144 440K Interlock (Refurbished)

    About Allen-Bradley 440K-A11144Product Overview Allen-Bradley 440K-A11144 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...

    $45.00
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  • Allen-Bradley 440K-A11115 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-A11115 440K Interlock (Refurbished)

    About Allen-Bradley 440K-A11115Product Overview Allen-Bradley 440K-A11115 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-A11112 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-A11112 440K Interlock (Refurbished)

    About Allen-Bradley 440K-A11112Product Overview Allen-Bradley 440K-A11112 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-A11095 440K Interlock

    Allen-Bradley

    Allen-Bradley 440K-A11095 440K Interlock (Refurbished)

    About Allen-Bradley 440K-A11095Product Overview Allen-Bradley 440K-A11095 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-A11094 440K Interlock
    In Stock

    Allen-Bradley

    Allen-Bradley 440K-A11094 440K Interlock (Refurbished)

    About Allen-Bradley 440K-A11094Product Overview Allen-Bradley 440K-A11094 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...

    $43.00
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  • Allen-Bradley 440K-A09353 440K Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440K-A09353 440K Interlock (Refurbished)

    About Allen-Bradley 440K-A09353Product Overview Allen-Bradley 440K-A09353 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...

    $32.00
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  • Allen-Bradley 440K-33008 440K Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440K-33008 440K Interlock (Refurbished)

    About Allen-Bradley 440K-33008Product Overview Allen-Bradley 440K-33008 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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