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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 440N-G02164 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-G02164 440N Interlock (Refurbished)

    About Allen-Bradley 440N-G02164Product Overview Allen-Bradley 440N-G02164 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-G02161 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-G02161 440N Interlock (Refurbished)

    About Allen-Bradley 440N-G02161Product Overview Allen-Bradley 440N-G02161 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
    Ask for Quote
  • Allen-Bradley 440N-G02160 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-G02160 440N Interlock (Refurbished)

    About Allen-Bradley 440N-G02160Product Overview Allen-Bradley 440N-G02160 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
    Ask for Quote
  • Allen-Bradley 440N-G02157 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-G02157 440N Interlock (Refurbished)

    About Allen-Bradley 440N-G02157Product Overview Allen-Bradley 440N-G02157 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
    Ask for Quote
  • Allen-Bradley 440N-G02156 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-G02156 440N Interlock (Refurbished)

    About Allen-Bradley 440N-G02156Product Overview Allen-Bradley 440N-G02156 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
    Ask for Quote
  • Allen-Bradley 440NG02155A 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440NG02155A 440N Interlock (Refurbished)

    About Allen-Bradley 440NG02155AProduct Overview Allen-Bradley 440NG02155A 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...

    $232.50
    Ask for Quote
  • Allen-Bradley 440N-G02155 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-G02155 440N Interlock (Refurbished)

    About Allen-Bradley 440N-G02155Product Overview Allen-Bradley 440N-G02155 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
    Ask for Quote
  • Allen-Bradley 440N-G02154 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-G02154 440N Interlock (Refurbished)

    About Allen-Bradley 440N-G02154Product Overview Allen-Bradley 440N-G02154 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
    Ask for Quote
  • Allen-Bradley 440N-G02149 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-G02149 440N Interlock (Refurbished)

    About Allen-Bradley 440N-G02149Product Overview Allen-Bradley 440N-G02149 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...

    $442.00
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  • Allen-Bradley 440N-G02147 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-G02147 440N Interlock (Refurbished)

    About Allen-Bradley 440N-G02147Product Overview Allen-Bradley 440N-G02147 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
    Ask for Quote
  • Allen-Bradley 440NG02143X 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440NG02143X 440N Interlock (Refurbished)

    About Allen-Bradley 440NG02143XProduct Overview Allen-Bradley 440NG02143X 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
    Ask for Quote
  • Allen-Bradley 440N-G02143 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-G02143 440N Interlock (Refurbished)

    About Allen-Bradley 440N-G02143Product Overview Allen-Bradley 440N-G02143 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
    Ask for Quote
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