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Allen Bradley 440T-MRKSE11AA Safety Limit Switch - Extended Roller Lever

Allen Bradley 440T-MRKSE11AA safety limit switch with extended roller lever.

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ManufacturerAllen Bradley

Part number440T-MRKSE11AA

Actuator Type Extended Roller Lever

Safety Function Guard Position Monitoring

Mounting Type Surface Mount

Connection Type Screw Terminals

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Extended roller lever for greater reach Heavy-duty construction IP66 rating for environmental protection Reliable mechanical interlock High switching capacity Detects guard position

Product description

The Allen Bradley 440T-MRKSE11AA is a heavy-duty safety limit switch featuring an extended roller lever actuator. This configuration is designed for applications requiring a longer reach or specific engagement point to monitor machine guards. It provides a reliable mechanical interlock solution, ensuring that hazardous machine functions are disabled when guards are not securely in place.

This switch is commonly deployed in industrial settings such as manufacturing plants, assembly lines, and material handling systems where robust safety interlocks are essential. The extended lever provides flexibility in mounting and activation scenarios.

Stanlo Automation, a veteran-owned distributor specializing in surplus industrial automation parts, carries the Allen Bradley 440T-MRKSE11AA. Source your safety components from Stanlo Automation for dependable performance and value.

Technical specifications

Actuator Type	Extended Roller Lever
Safety Function	Guard Position Monitoring
Mounting Type	Surface Mount
Connection Type	Screw Terminals
Voltage Rating	250V AC/DC
Current Rating	10A AC/DC
IP Rating	IP66
Series	440T-MRKSE

Common applications

Machine Guarding

Automated Assembly

Material Handling

Packaging Equipment

Industrial Safety Systems

Large Machine Enclosures

Compatible systems

Allen Bradley MSR Series Safety Relays Guardmaster Safety Systems Standard Control Logic

Also known as

Allen Bradley 440T-MRKSE11AA Safety Guard Switch Long Roller Limit Switch

Replaces / compatible with

Suitable for applications needing a longer actuator reach compared to standard roller levers. Directly replaces comparable safety limit switches in safety circuits.

Technical note

Expert tip

The extended roller lever allows for actuation from a greater distance, making it ideal for larger or more complex guard designs.

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Frequently asked questions

When would an extended roller lever like on the 440T-MRKSE11AA be preferred over a standard one?

The extended roller lever on the 440T-MRKSE11AA is beneficial when the machine guard is positioned further away from the switch mounting point, or when a longer travel distance is required for activation. This allows for more flexible installation and reliable engagement.