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440P Interlocks

Allen-Bradley 440P Safety Limit Switches

Allen-Bradley 440P safety limit switches are mechanical safety devices used to monitor machine guard positions and control access to hazardous equipment. These switches are commonly installed on protective machine enclosures and access doors to ensure machinery operates only when guards are properly positioned.

Mechanical safety limit switches are widely used across industrial automation systems because of their simple design, reliability, and compatibility with many machine safety circuits. The 440P series is frequently found on manufacturing equipment, conveyor systems, and assembly machinery.

This category includes refurbished Allen-Bradley 440P safety switches used for maintenance replacement and spare parts inventory. Keeping compatible replacement safety components available helps facilities minimize downtime and maintain safe machine operation.

Common 440P applications

  • Mechanical guard door monitoring
  • Industrial conveyor safety systems
  • Machine enclosure safety monitoring
  • Packaging equipment safety switches
  • OEM machine guarding systems

Related categories

When replacing a safety limit switch, confirm actuator style, mounting dimensions, and electrical ratings to ensure compatibility with the machine safety circuit.

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    Allen-Bradley

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    About Allen-Bradley 440P-SCI17Product Overview Allen-Bradley 440P-SCI17 is a refurbished 440P 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 440P-SCI16 440P Interlock (New Surplus)

    About Allen-Bradley 440P-SCI16Product Overview Allen-Bradley 440P-SCI16 is a refurbished 440P 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 440P-SCI14 440P Interlock (New Surplus)

    About Allen-Bradley 440P-SCI14Product Overview Allen-Bradley 440P-SCI14 is a refurbished 440P 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

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    About Allen-Bradley 440P-SC127Product Overview Allen-Bradley 440P-SC127 is a refurbished 440P 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 440P-NX9 440P Interlock (New Surplus)

    About Allen-Bradley 440P-NX9Product Overview Allen-Bradley 440P-NX9 is a refurbished 440P safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring doors,...

    $232.50
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    Allen-Bradley

    Allen-Bradley 440P-NX8 440P Interlock (New Surplus)

    About Allen-Bradley 440P-NX8Product Overview Allen-Bradley 440P-NX8 is a refurbished 440P safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring doors,...

    $165.00
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    Allen-Bradley

    Allen-Bradley 440P-NX7 440P Interlock (New Surplus)

    About Allen-Bradley 440P-NX7Product Overview Allen-Bradley 440P-NX7 is a refurbished 440P safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring doors,...

    $165.00
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    Allen-Bradley

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    About Allen-Bradley 440P-NX6Product Overview Allen-Bradley 440P-NX6 is a refurbished 440P safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring doors,...

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    Allen-Bradley

    Allen-Bradley 440P-NX5 440P Interlock (New Surplus)

    About Allen-Bradley 440P-NX5Product Overview Allen-Bradley 440P-NX5 is a refurbished 440P safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring doors,...

    $127.50
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    Allen-Bradley

    Allen-Bradley 440P-NX4 440P Interlock (New Surplus)

    About Allen-Bradley 440P-NX4Product Overview Allen-Bradley 440P-NX4 is a refurbished 440P safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring doors,...

    $127.50
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    Allen-Bradley

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    About Allen-Bradley 440PNX10Product Overview Allen-Bradley 440PNX10 is a refurbished 440P safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring doors,...

    $41.24
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    Allen-Bradley

    Allen-Bradley 440P-NX1 440P Interlock (New Surplus)

    About Allen-Bradley 440P-NX1Product Overview Allen-Bradley 440P-NX1 is a refurbished 440P safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring doors,...

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