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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 440K-MT55097 440K Interlock (New Surplus)

    About Allen-Bradley 440K-MT55097Product Overview Allen-Bradley 440K-MT55097 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...

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    Allen-Bradley

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    About Allen-Bradley 440K-MT55096Product Overview Allen-Bradley 440K-MT55096 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...

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    Allen-Bradley

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    About Allen-Bradley 440K-MT55095Product Overview Allen-Bradley 440K-MT55095 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...

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    Allen-Bradley

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    About Allen-Bradley 440KMT55094Product Overview Allen-Bradley 440KMT55094 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...

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    Allen-Bradley

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    About Allen-Bradley 440KMT55093Product Overview Allen-Bradley 440KMT55093 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...

    $165.00
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    Allen-Bradley

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    About Allen-Bradley 440K-MT55092Product Overview Allen-Bradley 440K-MT55092 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

    Allen-Bradley 440K-MT55091 440K Interlock (New Surplus)

    About Allen-Bradley 440K-MT55091Product Overview Allen-Bradley 440K-MT55091 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...

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    Allen-Bradley

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    About Allen-Bradley 440KMT55090Product Overview Allen-Bradley 440KMT55090 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...

    $165.00
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    Allen-Bradley

    Allen-Bradley 440K-MT55089 440K Interlock (New Surplus)

    About Allen-Bradley 440K-MT55089Product Overview Allen-Bradley 440K-MT55089 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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    About Allen-Bradley 440K-MT55088Product Overview Allen-Bradley 440K-MT55088 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...

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    Allen-Bradley

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    About Allen-Bradley 440K-MT55087Product Overview Allen-Bradley 440K-MT55087 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...

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    Allen-Bradley

    Allen-Bradley 440K-MT55086 440K Interlock (New Surplus)

    About Allen-Bradley 440K-MT55086Product Overview Allen-Bradley 440K-MT55086 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...

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