The ESD - RSLinx Classic OEM Perpetual with Self Support is a reliable communication driver widely used in industrial automation for connecting various devices across networks like EtherNet/IP, DeviceNet, ControlNet, as well as older serial networks such as DF-1, DH-485, and DH+. Distributed by BSP Automation, this software comes in different licensing options—from the basic RSLinx Classic Lite to more advanced licensed versions like the OEM edition. Licensed versions offer additional functionality, including OPC DA support, allowing integration with non-Rockwell software systems for greater flexibility in complex automation environments.