SST-PB3-CLX-RLL MOLEX

Description

The Molex SST-PB3-CLX-RLL (also known as Brad SST Profibus DP Master/Slave Communication Module for ControlLogix with Remote Link Library) is a powerful interface module designed to connect Allen-Bradley ControlLogix Programmable Logic Controllers (PLCs) to Profibus DP networks. This module allows the ControlLogix system to act as both a Profibus DP Master and/or Slave, enabling seamless data exchange with a wide range of Profibus-compatible field devices. The “RLL” designation indicates the inclusion of the Remote Link Library, which provides enhanced functionality for remote monitoring and configuration of the Profibus network from within the ControlLogix environment.

Application Scenarios

The SST-PB3-CLX-RLL is ideal for applications where a Rockwell Automation ControlLogix system needs to communicate with devices on a Profibus DP network. Some typical scenarios include:

Integrating Profibus-based instruments and sensors: Connecting Profibus-enabled flow meters, pressure transmitters, temperature sensors, and other process instrumentation to a ControlLogix system for data acquisition and control.
Interfacing with Profibus motor drives and actuators: Controlling Profibus variable frequency drives (VFDs), servo drives, and pneumatic/hydraulic actuators from the ControlLogix PLC.
Connecting to other Profibus PLCs or control systems: Enabling data exchange between a ControlLogix system acting as a secondary controller or gateway within a larger Profibus network.
Upgrading legacy systems: Allowing modern ControlLogix controllers to interface with existing Profibus DP field devices during system upgrades.
Distributed I/O applications: Using the ControlLogix system to manage remote Profibus DP I/O blocks.

Parameter

Main Parameters Value/Description Product Model SST-PB3-CLX-RLL (Molex Part Number: 112016-0018) Manufacturer Molex (Woodhead/Brad) Product Category Profibus DP Master/Slave Communication Module PLC Compatibility Rockwell Automation ControlLogix Profibus Interface 1 x Profibus DP port (DB9 Female) Protocols Supported Profibus DP-V0 Master (Class 1 & 2), Profibus DP-V1 Master (Class 1 & 2), Profibus DP-V0 Slave Data Transfer Modes Direct Mode (up to 496 input bytes / 496 output bytes), Paging Mode (up to 1984 input bytes / 1968 output bytes) Baud Rate Supports all Profibus baud rates up to 12 Mbps Backplane Interface ControlLogix backplane Remote Link Library (RLL) Included Enables remote monitoring and configuration Configuration Software Rockwell Automation RSLogix 5000, SST Configuration Tool Indicators LEDs for System (SYS), Communication (COMM), and OK status Operating Temperature 0°C to +60°C (32°F to 140°F) Storage Temperature -40°C to +85°C (-40°F to 185°F) Backplane Current Consumption 850 mA @ 5V DC or 1.75 mA @ 24V DC Isolation 1000V galvanic isolation Dimensions Standard ControlLogix single-slot module

Technical Principles and Innovative Values

Seamless ControlLogix Integration: The module integrates directly into the ControlLogix backplane and comes with an Add-On Profile (AOP) for easy configuration within RSLogix 5000 software, reducing commissioning time and complexity.
Dual Master/Slave Functionality: The ability to operate as both a Profibus DP Master and Slave provides flexibility in network design and allows the ControlLogix system to control Profibus devices and also respond to other Profibus masters.
Remote Link Library (RLL): This unique feature allows users to remotely monitor and download changes to the Profibus configuration from within the ControlLogix environment, simplifying maintenance and troubleshooting.
High Data Throughput: Supports both direct and paging data transfer modes, allowing for efficient exchange of large amounts of data with Profibus devices.
Comprehensive Profibus Support: Manages DP-V1 services and supports all standard Profibus baud rates, ensuring compatibility with a wide range of Profibus devices.
Robust Diagnostics: Onboard LEDs provide clear indication of system, communication, and network status, aiding in quick identification of potential issues.

Application Cases and Industry Value

In a large automotive manufacturing plant, a ControlLogix PLC might need to control numerous Profibus-enabled robotic welding arms and paint sprayers. The SST-PB3-CLX-RLL module would provide the necessary interface, allowing the PLC to send precise motion commands and receive feedback from the robots over the Profibus DP network. The RLL feature would enable remote monitoring of the Profibus communication status and allow engineers to update robot programs from the central control room, reducing downtime and improving efficiency.

In a chemical processing plant, a ControlLogix system could use the SST-PB3-CLX-RLL to gather real-time data from a multitude of Profibus-connected flow meters, pressure sensors, and valve positioners. This data would be used for process monitoring and control. The dual master/slave capability could also allow the ControlLogix system to act as a slave to a higher-level plant management system communicating over Profibus.

Installation, Maintenance, and Full-Cycle Support

Installation involves inserting the SST-PB3-CLX-RLL module into a free slot in the ControlLogix chassis and connecting the Profibus DP network cable to the DB9 connector. Configuration is done within the RSLogix 5000 environment using the Add-On Profile. The Remote Link Library provides tools for remote configuration and diagnostics. Routine maintenance is typically minimal, focusing on ensuring secure cable connections and monitoring the status LEDs. Molex provides comprehensive documentation, including user manuals and datasheets, for the SST-PB3-CLX-RLL. Their technical support and a network of distributors are available to assist with installation, commissioning, and troubleshooting throughout the product lifecycle.