Eaton’s SMP I/O platform is a substation-grade module specially designed to meet the requirement for distributed I/O in modern utility substation automation systems. The SMP I/O platform supports binary input and binary output modules, as well as analog input modules. It operates with AC or DC voltage, and communicates using the DNP3 protocol over serial RS-485 or TCP/IP using fiber or copper Ethernet. It supports IEC 61850 GOOSE messaging and can be integrated with the SMP Gateway or used as a standalone I/O module that connects directly to a DNP3 master station. The SMP I/O platform is one of Eaton's grid automation system solutions.