SEL 3555 RTAC

SEL 3555 RTAC

The SEL 3555 on the high end of the RTAC family. It’s an RTU supporting Modbus, DNP3, IEC 61950, and GOOSE protocols. It’s most commonly used as a data concentrator for large point counts. It’s now being used to do control of several solar power plants, replacing an industrial PLC. It has fairly basic HMI capabilities built-in, though not like what you can do with most commercial HMI applications.