MOLEX SST-SR4-CLX-RLL Serial Communication Module

Overview

The SST-SR4-CLX-RLL is a high-performance serial communication module from Molex designed for Allen-Bradley ControlLogix systems. It offers four independent serial ports, enabling seamless integration of Modbus and other serial devices. Acting as a protocol gateway, the module allows ControlLogix processors to communicate directly with Modbus RTU/ASCII masters, slaves, and other serial-based equipment.

Technical Specifications

Communication Ports

• Number of Ports: 4 serial ports (RS-232/RS-422/RS-485 configurable)
• Protocols Supported: Modbus RTU (Master/Slave), Modbus ASCII, DF1, ASCII, others
• Baud Rates: 300 to 115,200 bps
• Data Bits: 7 or 8
• Stop Bits: 1 or 2
• Parity: None, Even, Odd
• Flow Control: Hardware (RTS/CTS), Software (XON/XOFF)

ControlLogix Integration

• Slot Compatibility: Standard ControlLogix chassis slot
• Backplane Communication: Compatible with RSLogix 5000 / Studio 5000
• Configuration & Diagnostics: Uses Remote Link Library (RLL)
• Data Exchange: Cyclic and event-driven transfer, configurable message mapping and polling

Environmental Ratings

• Operating Temperature: 0°C to +60°C (32°F to 140°F)
• Storage Temperature: –40°C to +85°C (–40°F to 185°F)
• Humidity: 5% to 95% non-condensing
• Shock & Vibration: Meets ControlLogix industrial standards