The Teridian™ 78M6618 PDU1 evaluation board is an example of a low-cost power distribution unit (PDU) utilizing the 78M6618 system-on-chip (SoC). The 78M6618 monitors the AC line voltage and eight load currents, and controls switching of eight internal load relays. The embedded firmware calculates the RMS line voltage and RMS load currents, watts, VAs, VARs, and power factor. The real-time data is transmitted to a PC via a USB interface for display in a Windows®-based graphical user interface (GUI). The 78M6618 UART interface is used as the communications link to an on-board isolated USB interface IC.