Ethernet I/O modules for factory automation are devices used in industrial automation to facilitate communication between machinery and control systems via Ethernet. These modules are produced by various global companies, such as Siemens (Germany), Rockwell Automation (USA), and Mitsubishi Electric (Japan). They serve industries like manufacturing, automotive, and logistics, offering products like remote I/O modules, gateways, and network adapters to enhance connectivity and data exchange in automated systems.