Rockwell Packs More Motion and Safety Into CompactLogix 5390 PLC

Rockwell Automation has introduced the CompactLogix 5390, a programmable logic controller that combines integrated safety, cybersecurity, motion control, and modular I/O in a footprint 43% smaller than the previous CompactLogix 5380. Depending on the model, the controller supports up to 128 motion axes, 32 local PointMax I/O modules, 300 EtherNet/IP nodes, and 4,000 OPC UA nodes. Security features include CIP Security, Syslog, and IEC 62443-4-2-aligned capabilities. Compatible with Rockwell’s Kinetix motion systems, PowerFlex drives, Stratix networking equipment, and FactoryTalk Design Studio software, the 5390 targets machine builders and system integrators developing connected automation systems.

Rockwell Automation’s CompactLogix 5390 controller with local PointMax I/O modules. Image used courtesy of Rockwell Automation

The new controller targets machine builders, OEMs, and system integrators working with everything from standalone machines to larger production systems. Along with expanded motion control and data-handling capabilities, the 5390 supports local PointMax I/O and several industrial networking options.

More Than Just a Smaller PLC

Rockwell Automation reports that the CompactLogix 5390 is 43% smaller than the previous CompactLogix 5380. While the smaller size helps engineers with limited cabinet space, the bigger improvement is the increased control and networking capability in the CompactLogix family.

The CompactLogix 5390 controller can support up to 32 local PointMax I/O modules, 128 motion axes, 300 EtherNet/IP nodes, and 4,000 OPC UA nodes. Image used courtesy of Rockwell Automation

Depending on the model, the controller supports up to 32 local PointMax I/O modules, with standard, safety, and specialty I/O options available. It also supports remote PointMax I/O, allowing engineers to distribute I/O throughout a machine rather than wiring everything back to the main control cabinet.

The 5390 also offers a wide range of configurations to support machines with different motion control, networking, and I/O requirements. Entry-level models support eight motion axes, 60 EtherNet/IP nodes and 300 OPC UA nodes, while higher-end configurations support up to 128 motion axes, 300 EtherNet/IP nodes and 4,000 OPC UA nodes. Standard and safety memory capacities range from 0.4 MB each to 10 MB each. For OEMs building everything from smaller standalone machines to more complicated production systems, that range could make it easier to standardize on the CompactLogix platform without having to change controller families as machine requirements increase.

Security and Connectivity Are Becoming Design Requirements

Rockwell Automation is also putting a greater emphasis on cybersecurity with the CompactLogix 5390. Cybersecurity features are typically seen as something that matters only for large plant networks or highly connected systems. Today, that's changing. More manufacturers are connecting production equipment to MES, SCADA, analytics, and cloud-based systems, which means controllers are expected to support secure communications from day one. The CompactLogix 5390 supports technologies such as CIP Security and Syslog, along with capabilities aligned with IEC 62443-4-2. Built-in features give engineers more control over how machines communicate with other equipment and how access to those systems is managed.

Rockwell Automation's CompactLogix 5390 safety system architecture shows how the controller connects to distributed safety I/O, drives, and operator interfaces through an industrial network. Image used courtesy of Rockwell Automation

The platform also supports OPC UA, EtherNet/IP, Dual IP, and multiple industrial network topologies. Modern controllers are no longer expected to simply run machine logic. They're increasingly seen as a bridge between machine-level operations and higher-level manufacturing systems. From that perspective, the CompactLogix 5390 feels less like a standard controller refresh and more like Rockwell's attempt to combine machine control, safety, connectivity, and cybersecurity into a platform for increasingly connected manufacturing environments.

Final Thoughts

The CompactLogix 5390 also works with other Rockwell Automation products, including Kinetix motion systems, PowerFlex drives, Stratix networking equipment, and FactoryTalk Design Studio software. For engineers already working with Logix controllers, this should make it easier to incorporate the 5390 into existing machine designs without learning an entirely different control platform.

What's interesting about the 5390 is how much Rockwell Automation has packed into a smaller controller. Integrating safety, cybersecurity, motion control, and modular I/O support into one platform could simplify the design process. Of course, not every application needs 128 motion axes or thousands of OPC UA nodes, so choosing the right configuration still depends on what the machine actually needs.