Overview
The Allen-Bradley 440S-SF8D is a GuardLink enabled connection tap that serves as an intelligent safety device interface within the Guardmaster ecosystem. This M12 8-pin adapter provides OSSD (Output Switching Signal Device) contacts rated for 24 VDC operation, enabling seamless integration with Power-to-Release (PTR) guard locking systems. The tap functions as an active access point on a GuardLink safety network, allowing status monitoring and diagnostic feedback to flow directly to your control system.
Key Features
- GuardLink Protocol Support: Delivers safety-based communications linking safety to The Connected Enterprise, with advanced diagnostics at the device level
- M12 8-Pin Connector: Female M12 micro connector for robust, field-replaceable connections in harsh industrial environments
- OSSD Output Contacts: Output Switching Signal Device contacts suitable for both guard locking and safety relay integration
- Power-to-Release (PTR) Compatibility: Compatible with Power to Release guard locks
- Compact Footprint: DIN-rail or surface mountable in any orientation for flexible installation
- Wide Operating Range: Operating temperature -25°C to +70°C for indoor and controlled outdoor applications
Technical Specifications
- Supply Voltage: 24 VDC (nominal)
- Connector Type: M12 8-pin female
- Output Type: OSSD (Output Switching Signal Device) solid-state contacts
- Guard Lock Compatibility: Power-to-Release (PTR) function
- Operating Temperature: −25 °C to +70 °C
- Dimensions: 79.64 × 38.5 × 17 mm
- Material: Plastic enclosure
- Mounting: Any orientation
- Safety Rating: PLe rated
- Weight: 0.10 lbs
- Cable Distance: Maximum 30 m between GuardLink enabled taps or devices
Typical Applications
The 440S-SF8D is commonly deployed in:
- Machine safety guard door interlocking systems with real-time status monitoring
- Emergency stop (E-stop) networks requiring distributed diagnostics
- Integrated safety systems using GuardLink protocol across multiple zones
- OEM and integrator installations where device-level intelligence improves uptime and troubleshooting
- Manufacturing facilities leveraging the 440R-ENETR EtherNet/IP network interface for integration with The Connected Enterprise
Compatibility & Replacements
Compatible With
- Rockwell Automation Guardmaster safety relay modules (dual GuardLink relay)
- GuardLink enabled safety devices and controllers
- EtherNet/IP networks (via 440R-ENETR gateway)
- Linear topology GuardLink systems with M12 4-conductor trunk or 5-conductor drop patchcords
- Power-to-Release (PTR) guard locking switches and interlocks
Replaces / Drop-In Replacement For
- Earlier generation Guardmaster M12 tap modules (verify part number with your system integrator)
- Direct replacement for same-series 440S-SF8D units
Works With
- GuardLink safety communication protocol
- Rockwell Automation Studio 5000 and safety configuration software
- EtherNet/IP gateway connectivity for enterprise integration
- Standard M12 industrial connectors and patchcords (4-pin trunk, 5-pin drop)
- Power-to-Release and Power-to-Lock control schemes
