B&R Industrial Automation's X20 stand-alone hub
ETHERNET HUB SYSTEM
Stand-alone, modular Ethernet hub system can be used as a 4x or 6x hub. The system can also be expanded with an X20 bus coupler module with an integrated 2x hub for Ethernet POWERLINK. This allows remote I/O to be connected directly to the hub. POWERLINK supports all standard topologies.