The M550 is a fully programmable three phase power transducer with an isolated RS485 based communication port supporting a subset of Modicon's Modbus protocol.

Its accuracy is class 0.2% for input signals down to 10% Un and 10% In, (1% of reading for energy measurements.IEC1036), 50-60Hz.

The M550 measures Voltages, Currents, Import/Export Power (W, VAr, VA), True Power Factor, Frequency, Import/Export Demands(Wd, VArd, VAd, Ad) and Import/Export Energy (W.h, VAr.h, VA.h), and A.h, pulsed through a relay

All measured quantities can be extracted from the transducer, the system's parameters can be set up remotely, important data can be saved to computer and the order of the Modbus registers themselves can be changed.

The relay installed in the M550 can be used as a flexible monitoring relay and can have up to eight conditions attached to it.