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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 440N-S32021 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32021Product Overview Allen-Bradley 440N-S32021 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

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  • Allen-Bradley 440N-S32017 440N Interlock
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    Allen-Bradley 440N-S32017 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32017Product Overview Allen-Bradley 440N-S32017 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

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  • Allen-Bradley 440N-S32016 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32016 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32016Product Overview Allen-Bradley 440N-S32016 is a refurbished 440N 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 440N-S32015 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32015 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32015Product Overview Allen-Bradley 440N-S32015 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $135.00
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  • Allen-Bradley 440N-S32014 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32014 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32014Product Overview Allen-Bradley 440N-S32014 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $135.00
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  • Allen-Bradley 440N-S32013 440N Interlock
    In Stock

    Allen-Bradley

    Allen-Bradley 440N-S32013 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32013Product Overview Allen-Bradley 440N-S32013 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $397.80
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  • Allen-Bradley 440N-IN008 440N Interlock (Refurbished)
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    Allen-Bradley 440N-IN008 440N Interlock (Refurbished)

    About Allen-Bradley 440N-IN008Product Overview Allen-Bradley 440N-IN008 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

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  • Allen-Bradley 440N-H02087 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-H02087 440N Interlock (Refurbished)

    About Allen-Bradley 440N-H02087Product Overview Allen-Bradley 440N-H02087 is a refurbished 440N 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 440N-H02086 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440N-H02086 440N Interlock (Refurbished)

    About Allen-Bradley 440N-H02086Product Overview Allen-Bradley 440N-H02086 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $1,014.00
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  • Allen-Bradley 440N-H02047 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-H02047 440N Interlock (Refurbished)

    About Allen-Bradley 440N-H02047Product Overview Allen-Bradley 440N-H02047 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $1,144.00
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  • Allen-Bradley 440N-H02046 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-H02046 440N Interlock (Refurbished)

    About Allen-Bradley 440N-H02046Product Overview Allen-Bradley 440N-H02046 is a refurbished 440N 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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