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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.

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    Allen-Bradley

    Allen-Bradley 440N-G02092 440N Interlock (New Surplus)

    About Allen-Bradley 440N-G02092Product Overview Allen-Bradley 440N-G02092 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-G02091 440N Interlock New Surplus

    Allen-Bradley

    Allen-Bradley 440N-G02091 440N Interlock (New Surplus)

    About Allen-Bradley 440N-G02091Product Overview Allen-Bradley 440N-G02091 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...

    $572.00
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  • Allen-Bradley 440N-G02090 440N Interlock New Surplus
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    Allen-Bradley

    Allen-Bradley 440N-G02090 440N Interlock (New Surplus)

    About Allen-Bradley 440N-G02090Product Overview Allen-Bradley 440N-G02090 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

    Allen-Bradley 440N-G02089 440N Interlock (New Surplus)

    About Allen-Bradley 440N-G02089Product Overview Allen-Bradley 440N-G02089 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...

    $405.00
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  • Allen-Bradley 440N-G02088 440N Interlock New Surplus
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    Allen-Bradley

    Allen-Bradley 440N-G02088 440N Interlock (New Surplus)

    About Allen-Bradley 440N-G02088Product Overview Allen-Bradley 440N-G02088 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-G02085 440N Interlock (New Surplus)

    About Allen-Bradley 440N-G02085Product Overview Allen-Bradley 440N-G02085 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...

    $1,180.80
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    Allen-Bradley 440N-G02083 440N Interlock (New Surplus)

    About Allen-Bradley 440N-G02083Product Overview Allen-Bradley 440N-G02083 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-G02082 440N Interlock New Surplus

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    Allen-Bradley 440N-G02082 440N Interlock (New Surplus)

    About Allen-Bradley 440N-G02082Product Overview Allen-Bradley 440N-G02082 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...

    $375.00
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  • Allen-Bradley 440N-G02077 440N Interlock New Surplus
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    Allen-Bradley 440N-G02077 440N Interlock (New Surplus)

    About Allen-Bradley 440N-G02077Product Overview Allen-Bradley 440N-G02077 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-G02075 440N Interlock New Surplus

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    Allen-Bradley 440N-G02075 440N Interlock (New Surplus)

    About Allen-Bradley 440N-G02075Product Overview Allen-Bradley 440N-G02075 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-G02061 440N Interlock New Surplus
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    Allen-Bradley 440N-G02061 440N Interlock (New Surplus)

    About Allen-Bradley 440N-G02061Product Overview Allen-Bradley 440N-G02061 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...

    $547.20
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  • Allen-Bradley 440N-G02060 440N Interlock New Surplus
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    Allen-Bradley

    Allen-Bradley 440N-G02060 440N Interlock (New Surplus)

    About Allen-Bradley 440N-G02060Product Overview Allen-Bradley 440N-G02060 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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