The Beckhoff CU1128 is an EtherCAT junction module designed to branch EtherCAT networks in a star topology. It allows multiple EtherCAT segments to be connected from a single point and supports hot-connect, enabling devices or network segments to be connected or disconnected without interrupting system operation.

Beckhoff is a globally recognized automation brand, well known for high-performance EtherCAT networking and I/O solutions. The CU1128 is not a standard Ethernet switch; it is purpose-built for EtherCAT communication, ensuring deterministic data transfer with extremely low latency (approximately 1 µs per port).

Thanks to its robust industrial design, DIN-rail mounting, and reliable operation under vibration and harsh conditions, the CU1128 is widely used in large-scale automation systems, distributed control architectures, and factory production lines requiring flexible and scalable EtherCAT networks.