A full reference platform is now available from Renesas Electronics Europe for its RX21A Group of 32-bit microcontrollers (MCUs).
The platform includes a full development support environment featuring middleware for power measurement and calibration tools, ideal for designing ultra-compact smart electricity meters with a short time-to-market.
Hardware features include a modular designwith both 3-phase 4 wire and single-phase operation, and configurable sensor types including current transformer. This enables it to operate at nominal 230V 50Hz~60Hz, with full 100mA to 100A measurement range.
Accuracy is equivalent to IEC62053-22 (and ANSI C12.20), to at least 0.5s, and compliant with IEC6205-23, class 2 reactive.
The company advises a full set of metrology libraries is provided, enabling precision measurement of voltage and current on each phase, active and reactive power on each phase, and apparent and harmonic power on each phase. Power quality measurement functions such as voltage sag are also provided.
Key software features include single point calibration for the 24-bit precision A/D converter (ADC) and analogue front-end (AFE), and temperature compensation for the AFE including programmable gain amplifier (PGA) and ADC, voltage reference, and real time clock. Data exchange can be carried out via the IEC62056-21 (also known as IEC1107) optical port and isolated USB virtual COM port. A user-friendly, multi-function graphical display and an intuitive PC graphical user interface allow easy operation.
Renesas Electronics Europe
www.renesas.eu
