Overview
The Allen-Bradley 440E-LL5SE5 is a microprocessor-based cable pull safety switch from the Guardmaster Lifeline 5 series. These switches bring advanced features and diagnostics that help enhance safety and improve productivity, offering functions that simplify setup and allow for more efficient maintenance and troubleshooting. The Lifeline 5 switches are designed for various applications from general material handling to harsh food and beverage environments.
Key Features
- 2 OSSD outputs and 1 auxiliary output
- Electronic rope monitoring system that monitors the cable span and compensates for thermal expansion
- Rugged die-cast aluminum housing (IP66) with optional E-stop button
- Supports long cable spans up to 100 m (328 ft)
- LED operating status indicators visible from 270° that provide diagnostics for switch and tensioning setup
- 5-pin Micro (M12) connector with ArmorBlock Guard I/O connection option
Technical Specifications
- Operating Voltage: 24 Volts DC
- Output Configuration: 2 OSSD outputs and 1 auxiliary output
- Housing Material: High-quality aluminum
- IP Rating: IP66
- Operating Temperature Range: -20…+75 °C (-4…+167 °F)
- Cable Span: 100 meters or 328 feet
- Response Time (Off-State): 60 milliseconds
- Additional Switch Response Time: 5 milliseconds per switch
- Connector Type: 5-pin Micro (M12)
- E-Stop Capability: Included with E-stop option
Typical Applications
The 440E-LL5SE5 is ideal for safety-critical industrial control systems requiring long cable runs and reliable emergency stop functionality. Common installations include:
- Material handling and conveyor systems
- Machine guarding and perimeter protection
- Food and beverage processing environments
- Manufacturing floor safety stations
- Warehouse and logistics automation
Compatibility & Replacements
Compatible With
- Allen-Bradley / Rockwell Automation control systems
- Guardmaster safety relay modules and controllers
- EtherNet/IP enabled safety systems (432ES)
- Studio 5000 Logix Designer safety software
- GuardLink communication protocol
- Standard M12 5-pin connector installations
Replaces / Drop-In Replacement For
The 440E-LL5SE5 can replace earlier cable pull safety switches where aluminum IP66 housing with E-stop functionality is required. Verify exact compatibility with your system integrator before ordering, as safety-rated device substitution requires validation.
Works With
- Rockwell Studio 5000 safety controller programming
- EtherNet/IP safety networks
- GuardLink industrial wireless protocols
- Allen-Bradley connection cables (889D-F5AC-5, 889D-F4ACDM-2)
- Guardmaster safety monitoring modules
- Standard industrial safety systems requiring OSSD outputs


















