Beckhoff EK1122 is a 2-port EtherCAT junction module that slots into an EtherCAT segment to enable star-topology configurations by inserting itself between EtherCAT Terminals. With two EtherCAT ports, it allows branching within the bus, supporting modular, star-shaped layouts in Beckhoff automation installations. Beckhoff documents the EK1122 as a tool to realize modular EtherCAT topology in a station, with multiple EK1122 units used to configure star networks in a single system.
