Allen Bradley 440K-T11204 Guardmaster

The Allen Bradley 440K-T11204 Guardmaster is a safety interlock switch designed for machine guarding and personnel protection in industrial automation environments. This heavy-duty safety device ensures that protective doors, gates, and access panels remain securely locked, preventing unauthorized or unsafe access to hazardous areas. It is part of Rockwell Automation’s Guardmaster safety product line, providing reliable, tamper-resistant safety solutions for manufacturing and process control applications.

Technical Specifications

  • Manufacturer: Allen Bradley (Rockwell Automation)
  • Model: 440K-T11204
  • Switch Type: Guardmaster Safety Interlock Switch
  • Locking Mechanism: Solenoid-operated
  • Contact Configuration: Multiple normally open (NO) and normally closed (NC) safety contacts
  • Actuation Method: Key-operated (trapped key interlock system)
  • Operating Voltage: 24V DC or 120V AC (varies by configuration)
  • Housing Material: Heavy-duty industrial-grade plastic or metal
  • Enclosure Rating: IP67 (dust-tight and water-resistant)
  • Operating Temperature Range: -25°C to +80°C (-13°F to +176°F)
  • Mounting: Panel or gate mounting options available

Key Features

  • Robust interlocking mechanism ensures secure access control
  • High-reliability solenoid operation prevents accidental disengagement
  • Multiple contact configurations for flexible safety circuit integration
  • Tamper-resistant design prevents unauthorized bypassing
  • IP67-rated enclosure for harsh industrial environments
  • LED status indicators (on select models) for easy diagnostics
  • Compatible with Allen Bradley safety relays and control systems

Compatible Allen Bradley Components

  • Allen Bradley Guardmaster Safety Relays (440R Series)
  • Allen Bradley GuardLogix Safety Controllers
  • FactoryTalk View for monitoring and safety diagnostics
  • Allen Bradley PanelView HMIs for operator control and feedback

Industry Applications

  • Machine guarding for manufacturing automation
  • Robotic work cell access control
  • Food and beverage processing safety systems
  • Pharmaceutical and chemical plant safety
  • Automated conveyor and packaging system interlocking

Installation & Operational Notes

  • Mount securely on doors, gates, or access panels for effective personnel safety
  • Ensure proper wiring to safety relays or PLC systems for reliable operation
  • Use with appropriate key actuators to maintain interlock integrity
  • Routine inspection recommended to ensure consistent safety performance

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