EVALSTPM3X-3PH Poly-phase energy metering evaluation board with current transformers based on the STPM33, STPM34 and STM8S903 Data brief Description The STPM33, STPM34 poly-phase evaluation board is a Class 0.2, single-phase or poly-phase meter with current transformer sensors for power line systems of Vnom = 140 to 300 VRMS, Inom / Imax = 5/100 ARMS, flin = 50/60 Hz ± 10% and Tamb = -40 to +85 °C. Measured data from the STPM33 and STPM34 are read by the STM8S903 device for 3-phase energy and power calculations and the active/reactive cumulative LED signals generation. Features 0.2% accuracy poly-phase meter evaluation board Vnom(RMS) = 140 to 300 V, Inom / Imax(RMS) = 5/100 A, flin = 50/60 Hz ± 10% USB isolated connector to PC GUI To display all measurements, the board can be interfaced with PC running evaluation software through an isolated USB port, which provides also the 3.3 V power supply. The board has also SPI/UART pins available to be interfaced to an external microcontroller for further application development. Power supply 3.3 V through USB connector SPI/UART connector for STPM33/34 direct access SWIM connector for firmware upgrade SPI/UART connector for expansion to external MCU 2x LEDs on board for active-reactive power IEC61000 standard compliant RoHS compliant November 2014 DocID027132 Rev 1 For further information contact your local STMicroelectronics sales office. 1/3 www.st.com Revision history EVALSTPM3X-3PH Revision history Table 1. Document revision history 2/3 Date Revision 03-Nov-2014 1 Changes Initial release. DocID027132 Rev 1 EVALSTPM3X-3PH IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2014 STMicroelectronics – All rights reserved DocID027132 Rev 1 3/3 3