Overview
The Allen-Bradley 440S-SF5D is a GuardLink-enabled tap from Rockwell Automation’s Guardmaster® safety connection line. It provides a quick-disconnect interface for connecting safety input devices with 5-pin OSSD (Output Signal Switching Device) contacts to GuardLink systems. This tap is part of Guardmaster’s modular safety architecture, designed to simplify installation and reduce system integration costs while maintaining Category 3 safety integrity.
Key Features
- GuardLink-enabled design for advanced safety diagnostics and device visibility
- 5-pin OSSD (Output Signal Switching Device) with solid-state contacts
- M12 Micro connector for secure, quick-disconnect connections
- Single-wire safety relay connection for simplified installation
- Compact DIN-rail compatible form factor
- Consistent terminal layout for standardized configuration
Technical Specifications
The 440S-SF5D meets industrial safety standards and is engineered for reliable machine guarding applications:
- Operating Voltage: 24V DC
- Connector Type: 5-pin Micro M12 Female
- Contact Type: Solid State (OSSD)
- Ingress Protection: IP67
- Operating Temperature: −20°C to +70°C (−4°F to +158°F)
- Housing Material: Polycarbonate
- Mounting: Panel mount with M5 screws
- Certifications: CE, cUL, RCM, UL
- Weight: 0.08 lb (36 g)
Typical Applications
- Machine guard interlocks and access control systems
- Emergency stop circuits and safety relay networks
- Light curtain and safety scanner integration
- Door and gate interlock systems
- Category 3 safety-rated control circuits
- Industrial automation and OEM safety system expansion
Compatibility & Replacements
Compatible With
- Guardmaster Dual GuardLink safety relays (440R series)
- GuardLink-enabled safety devices and sensors
- Guardmaster safety connection systems and quick-disconnect taps
- GuardLink safety-based communications protocol networks
- Rockwell Automation safety control architectures
Replaces / Drop-In Replacement For
The 440S-SF5D is a standard catalog unit designed as a direct replacement within the Guardmaster tap family. Verify compatibility with your specific safety relay configuration and application before ordering.
Works With
- Guardmaster EtherNet/IP Network Interface (440R-ENETR) for network communication
- GuardLink communications protocol for advanced diagnostics
- Safety PLC input expansion modules
- Guardmaster safety control software and configuration tools
















