Overview
The Allen-Bradley 440S-SF8D is a GuardLink Smart tap designed as an 8-pin OSSD (Output Signal Switching Device) connection tap for Guardmaster safety systems. GuardLink taps connect safety input devices to a GuardLink system, a safety-based communications protocol that links safety to The Connected Enterprise. This device is part of the Guardmaster quick-disconnect safety system and provides smart, networked connectivity for advanced diagnostics and system status visibility.
Key Features
- 8-pin connection type with ABS plastic material
- GuardLink enabled devices offer advanced features and diagnostics that can only be accessed through a GuardLink enabled connection tap.
- Reduces installation cost and promotes system modularity
- Multiple certifications including CCC, CE, CUL, KC, RCM, UL
- Operates with 24V DC Class 2 power
- Supports Category 3 safety systems
Technical Specifications
The device features an 8-pin TC connection with operating temperature range of -25 to 70 degrees C, storage temperature of -40 to 85°C, and environmental conditions of 35-85% relative humidity. The unit weighs 0.0900 lb and carries a 12-digit UPC of 889508697581.
Pinout includes white (auxiliary input), brown (lock/unlock), green (lock/unlock 24V DC), yellow (safety contact B), gray (safety contact A), pink (safety contact B input), blue (GND), and red (safety contact A+ 24V DC).
Typical Applications
The 440S-SF8D is used in industrial machinery guarding systems where safety monitoring and interlocking are required. Common applications include:
- Guard door interlock systems
- Emergency stop (E-stop) device integration
- Safety relay expansion for PLC input circuits
- Machine access point monitoring
- Modular safety system expansion
Compatibility & Replacements
Compatible With
- Guardmaster GuardLink Safety System
- Guardmaster Dual GuardLink Safety Relay (440R/DG)
- GuardLink-enabled smart safety devices
- Guardmaster t-ports, distribution boxes, and shorting plugs
- Any GuardLink networked safety application
Replaces / Drop-In Replacement For
The Allen-Bradley 440S-SF8D is part of the GuardLink Enabled Tap catalog family that includes 440S-SF5D, 440S-SF8D, 440S-MF5D, 440S-MF8D, 440S-MLF8D, and 440S-SLF8D. The SF8D variant is a drop-in replacement for other 8-pin OSSD taps within the GuardLink family. Verify compatibility with your system integrator before ordering.
Works With
- Guardmaster Safety Control Systems
- Guardmaster User Manual publication 440R-UM015
- Industrial Automation Wiring and Grounding standards
- 24V DC safety control circuits
