Beckhoff EL9011 E-bus contact protection

The Beckhoff EL9011 is a passive EtherCAT Terminal designed to function as a physical termination for the E‑bus at the end of a modular I/O station. Its core function is to cover the exposed E‑bus contacts on the last terminal, protecting them from contamination and preventing communication errors. Its use is mandatory for every EK1100 EtherCAT station, ensuring reliable operation of the communication bus.