Overview
Allen-Bradley 440S-SF5D is a GuardLink Smart tap 5 pin OSSD designed for industrial machine safety applications. GuardLinkâ„¢ taps connect safety input devices to a GuardLink system, a safety-based communications protocol that links safety to The Connected Enterprise. This component is part of the Guardmaster GuardLink Safety System ecosystem and enables advanced safety diagnostics and real-time visibility of guard status and e-stop circuits.
Key Features
- 5-Pin OSSD Design: 5 Pin OSSD (Output Signal Switching Device) GuardLink Enabled Tap for standard safety device integration
- GuardLink Diagnostics: GuardLink enabled devices offer advanced features and diagnostics that can only be accessed through a GuardLink enabled connection tap.
- M12 Quick-Disconnect Connector: 5-pin Micro M12 connector for fast, reliable connections
- IP67 Ingress Protection: IP67 ingress protection for harsh industrial environments
- Safety System Benefits: Reduce installation cost, ease system expansion, simplify troubleshooting, promote system modularity, provide for Safety PLC input expansion, support systems up to Category 3
Technical Specifications
The 440S-SF5D meets stringent safety and environmental requirements for industrial automation:
- Operating Voltage: 24V DC
- Connector Type: 5-pin Micro M12
- Housing Material: Polycarbonate
- Operating Temperature: -25…+70 °C (-13…+158 °F)
- Storage Temperature: -40…+85 °C (-40…+185 °F)
- Ingress Protection Rating: IP67
- Dimensions (L × W × H): 79.64 x 38.5 x 17 mm (3.14 x 1.51 x 0.67 in.)
- Shipping Weight: 27.2 g (0.96 oz)
- Case Material: Red RAL 3020 unfilled ABS MG47C plastic
- Certifications: CE, cULus, RCM
Typical Applications
The Allen-Bradley 440S-SF5D is widely used in:
- Machine guarding and interlock systems
- Safety door and access gate monitoring
- E-stop and emergency shutdown circuits
- Industrial automation safety networks requiring PLC input expansion
- Production lines requiring modular safety system architecture
- Category 3 safety-rated control systems
Compatibility & Replacements
Compatible With
- Guardmaster GuardLink Safety Systems — all GuardLink-enabled networks and safety relays
- Rockwell Automation Safety Components — including the 440R-DG2R2T DG Safety Relay
- M12 5-Pin OSSD Safety Devices — any certified safety device with 5-pin OSSD outputs
- Category 3 Safety PLC Systems — supports input expansion for safety-rated controllers
Replaces / Drop-In Replacement For
The 440S-SF5D is the primary 5-pin GuardLink smart tap in the Guardmaster 440S series. Verify compatibility with your system integrator before ordering for legacy system replacements.
Works With
- GuardLink Communication Protocol — proprietary safety-based communications for machine safety
- Guardmaster Safety Relay Systems — 440R-DG2R2T and compatible safety modules
- EtherNet/IP Integration — via 440R-ENETR Network Interface for connected enterprise visibility
- Rockwell Automation Studio 5000 — design and configuration of Guardmaster safety systems
















