Product Overview

The SST-PFB-CLX is a high-speed communication module that enables Allen-Bradley ControlLogix® processors to interface directly with PROFIBUS DP networks. Functioning as a high-performance scanner, this module bridges the gap between Rockwell Automation’s premier controller platform and the PROFIBUS fieldbus standard. It allows for the seamless integration of diverse field devices—including motor starters, variable frequency drives, and remote I/O—into a centralized Logix-based control architecture.

By utilizing this scanner, engineers can leverage the diagnostic and control capabilities of PROFIBUS DP without the need for complex custom messaging logic. The SST-PFB-CLX occupies a single slot in any 1756 ControlLogix chassis and supports both Master and Slave modes, providing the flexibility to either control a network of DP slaves or act as a high-speed data provider to another DP master.

Network Architecture and Integration

The SST-PFB-CLX is engineered to handle large-scale distributed I/O configurations while maintaining deterministic performance. It streamlines the data mapping process by converting PROFIBUS cyclical data directly into Logix5000™ controller tags.

• Dual Interface Ports: Equipped with one RS-485 port for PROFIBUS DP connectivity and one RS-232 serial port for dedicated local configuration and diagnostics.

• Master/Slave Versatility: Capable of operating as a PROFIBUS DP-V0 Master, DP-V1 Master, or a DP Slave, supporting complex multi-master network topologies.

• Simplified Configuration: Works with dedicated configuration software that generates the necessary GSD file mapping for the ControlLogix processor, reducing commissioning time.

• High-Speed Data Exchange: Supports PROFIBUS baud rates up to 12 Mbps, ensuring real-time response for time-critical automation tasks.

Technical Specifications

• Manufacturer: Allen-Bradley / Molex (SST)

• Model Number: SST-PFB-CLX

• Module Type: PROFIBUS DP Scanner / Master Module

• Backplane Compatibility: ControlLogix 1756 Chassis

• Network Protocol: PROFIBUS DP-V0 and DP-V1

• Communication Speed: 9.6 Kbps up to 12 Mbps

• PROFIBUS Port: 9-pin D-sub (RS-485)

• Configuration Port: 8-pin Mini-DIN (RS-232)

• Power Requirements: 850 mA @ 5V DC; 1.75 mA @ 24V DC

• Operating Temperature: 0°C to 60°C (32°F to 140°F)

• Dimensions: 3.5 x 14.6 x 13.8 cm

• Weight: 0.20 kg

Operational Reliability in Industrial Environments

• Robust EMI Protection: Designed with an isolated RS-485 interface to ensure stable data transmission in electrically noisy environments typical of heavy manufacturing.

• Status Diagnostics: Front-panel LEDs provide immediate visual feedback for module health, network status, and communication activity, facilitating rapid troubleshooting.

• Large Data Capacity: Supports significant I/O mapping sizes, accommodating large numbers of remote I/O nodes and complex slave devices on a single segment.

• Global Compatibility: Meets standard industrial certifications (CE, UL), making it a trusted choice for international process automation and factory control projects.