Molex SST-SR4-CLX-RLL | ControlLogix Serial Communication Module

Overview

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

Technical Specifications

Communication Ports

• Number of Ports: 4 serial ports, configurable as RS-232, RS-422, or RS-485

• Supported Protocols: Modbus RTU (Master/Slave), Modbus ASCII, DF1, ASCII, others

• Baud Rates: 300–115,200 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: Remote Link Library (RLL)

• Data Exchange: Cyclic and event-driven, 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%–95% non-condensing

• Shock & Vibration: Meets ControlLogix industrial standards

Physical Dimensions and Weight

• Dimensions: 42 × 168 × 37 mm

• Weight: 2.0 lbs

• Warranty: 12 months

Connectivity and Performance

The SST-SR4-CLX-RLL ensures high-speed and reliable serial data exchange across multiple protocols. Its four configurable ports support flexible network topologies and allow direct integration of legacy or modern serial devices.

Installation and Reliability

This module fits standard ControlLogix chassis slots and uses Remote Link Library (RLL) for configuration and diagnostics. It operates reliably in industrial environments, with robust temperature, humidity, and shock ratings to guarantee stable performance.