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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.

  • Allen-Bradley 440N-S32115 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440N-S32115 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32115Product Overview Allen-Bradley 440N-S32115 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...

    $120.00
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  • Allen-Bradley 440N-S32111 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32111 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32111Product Overview Allen-Bradley 440N-S32111 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-S32110 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440N-S32110 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32110Product Overview Allen-Bradley 440N-S32110 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...

    $120.00
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  • Allen-Bradley 440N-S32109 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440N-S32109 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32109Product Overview Allen-Bradley 440N-S32109 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...

    $105.00
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  • Allen-Bradley 440N-S32108 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440N-S32108 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32108Product Overview Allen-Bradley 440N-S32108 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...

    $105.00
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  • Allen-Bradley 440N-S32107 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32107 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32107Product Overview Allen-Bradley 440N-S32107 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...

    $270.00
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  • Allen-Bradley 440N-S32105 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32105 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32105Product Overview Allen-Bradley 440N-S32105 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...

    $120.00
    Ask for Quote
  • Allen-Bradley 440N-S32102 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440N-S32102 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32102Product Overview Allen-Bradley 440N-S32102 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...

    $195.00
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  • Allen-Bradley 440N-S32101 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32101 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32101Product Overview Allen-Bradley 440N-S32101 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...

    $210.00
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  • Allen-Bradley 440N-S32099 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32099 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32099Product Overview Allen-Bradley 440N-S32099 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-S32096 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440N-S32096 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32096Product Overview Allen-Bradley 440N-S32096 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...

    $172.50
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  • Allen-Bradley 440NS32090 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440NS32090 440N Interlock (Refurbished)

    About Allen-Bradley 440NS32090Product Overview Allen-Bradley 440NS32090 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...

    $150.00
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