Allen-Bradley SST-PFB-CLX PROFIBUS DP Communication Module

Product Description

The Allen-Bradley SST-PFB-CLX functions as a powerful communication bridge that integrates PROFIBUS DP connectivity directly into the Rockwell Automation ControlLogix backplane. This module enables a ControlLogix processor to act as a Master or Slave on a PROFIBUS network, facilitating the control of distributed I/O, drives, and intelligent field instruments.

Technical Specifications

Functional Description

This scanner module eliminates the need for complex third-party gateways by slotting directly into a standard ControlLogix chassis. It manages the entire PROFIBUS DP cyclic data exchange process, mapping remote I/O data directly into the controller’s memory tags. Furthermore, the module supports DP-V1 acyclic messaging, which allows engineers to perform remote parameterization and advanced diagnostics on field devices. The dual-port design includes a dedicated PROFIBUS interface and a serial configuration port, ensuring that network commissioning remains independent of primary control traffic.

Engineering Advantages

• Backplane Integration: By residing directly on the ControlLogix backplane, the module provides significantly faster data throughput and lower latency compared to external Ethernet-to-PROFIBUS converters.
• High-Speed Communication: The hardware supports the full range of PROFIBUS baud rates up to 12 Mbps, which ensures rapid response times for time-critical motion and process loops.
• Simplified Configuration: The module works with standard engineering tools to define the network scan list and I/O mapping, which accelerates system startup and commissioning phases.
• Robust Network Isolation: Optical isolation protects the ControlLogix system from electrical noise and ground loops inherent in long fieldbus cable runs.
• Enhanced Diagnostics: The module provides real-time status bits for each slave device on the network, allowing maintenance teams to identify cable breaks or device failures immediately through the HMI.

FAQs

• Can the SST-PFB-CLX act as both a Master and a Slave simultaneously?

  The module typically functions as a PROFIBUS DP Master to control remote I/O. However, you can configure it as a Slave to allow a different Master (such as a Siemens PLC) to read data from the ControlLogix system.

• Which software is required for configuration?

  Engineers typically use the SST configuration console or integrated Studio 5000 Add-On Profiles (AOP) to define the GSD files and network parameters for the module.

• Is this module compatible with older ControlLogix L6 processors?

  Yes, the SST-PFB-CLX maintains compatibility with a wide range of ControlLogix controllers, including L6, L7, and L8 series, provided the chassis has an available slot and sufficient power.

• Does the module support the PROFIBUS DP-V1 protocol?

  Yes, the module supports DP-V1 functionality, enabling acyclic read/write commands for advanced device configuration and extended diagnostic data retrieval.