Key ratings — what they mean for fit
The 6AG1155-5AA00-7AB0: IRT support enables isochronous real-time communication with a minimum clock pulse of 250 µs, which matters for synchronized motion axes or drives on the same line. The listed I2t of 0.09 A²·s is a surge withstand rating for the internal supply path; size the upstream overcurrent protection to stay within this thermal limit. Diagnostic functions and alarms reduce downtime by pinpointing faults on the wire. With 100 Mbps full-duplex on both ports, autonegotiation, autocrossing, and media redundancy, the module handles typical line or star topologies without manual configuration. Prioritized startup (500 ms) gets the IO device on the network quickly after power-up.