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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.
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Revision history
EVALSTPM3X-3PH
Revision history
Table 1. Document revision history
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Date
Revision
03-Nov-2014
1
Changes
Initial release.
DocID027132 Rev 1
EVALSTPM3X-3PH
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