Allen Bradley SST-SR4-CLX-RLL Modbus Serial Communication Module

Applications

• Modbus RTU/ASCII communication gateway for ControlLogix automation systems

• Industrial integration between PLC backplanes and serial field devices

• Oil & gas and petrochemical plants using legacy Modbus serial networks

• Factory automation systems requiring multi-device serial data exchange

• OEM machinery integrating third-party Modbus sensors, drives, and meters

• Distributed control systems with mixed serial communication architectures

• Retrofit projects replacing standalone Modbus gateways with rack-mounted solutions

• Large-scale production lines requiring centralized serial protocol management

Key Advantages

• Supports multiple independent serial communication channels for flexible integration

• Acts as a protocol gateway between ControlLogix and Modbus devices

• Reduces the need for external communication converters or gateways

• Supports both Modbus RTU and ASCII communication modes

• Enables deterministic data exchange directly within PLC architecture

• Built-in diagnostics improve troubleshooting and system uptime

• Configurable for master or slave communication roles per channel

• Compact module design fits standard ControlLogix chassis systems

Technical FAQs

Q1: What protocol does this module primarily support?
It supports Modbus RTU and Modbus ASCII serial communication.

Q2: How many communication channels does it provide?
It provides four independent serial communication channels.

Q3: Can each channel operate independently?
Yes, each channel can be configured separately for different devices and roles.

Q4: Is it suitable for modern Ethernet-based systems?
It is mainly designed for serial Modbus systems, not Ethernet networks.

Q5: Does it require ladder logic programming?
In most configurations, it minimizes or eliminates complex ladder logic requirements.

Q6: Can it act as both master and slave?
Yes, each channel can be configured as Modbus master or slave.

Q7: Is it suitable for legacy system upgrades?
Yes, it is commonly used in retrofit and legacy Modbus integration projects.

Q8: Does it support multiple device communication?
Yes, it can communicate with multiple Modbus devices depending on configuration.

Q9: How is configuration handled?
Configuration is typically done using dedicated PC-based software tools.

Q10: Is it suitable for harsh industrial environments?
Yes, it is designed for industrial-grade operation in control cabinets.