ST IPE007V1 User Manual

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Mono-phase energy meter based on ST7Flite

Features

■ Satisfaction of IEC 61036 Accuracy

Requirements for Class 1 Meters

■ Cost-Effective: no ASSP used, single ST7F

MCU

■ Large voltage and current operative range

■ AFE(Analog Front End) operation amplifier

switches

■ Resistor divider used as voltage sensor

■ Works powered from a capacitive power supply

■ RTC interface using SPI for display date and

timer

■ Design with other ST7 MCU can be re-used

easily

■ Tamper detection: detects, signals and

continues to measure accurately under tamper
condition

■ Software calibration for analog circuit, PC GUI

available

■ External EEPROM for reliable storage of

parameters reading

■ LCD module interface for displaying up to 7

parameters

■ Embedded software easily upgradeable

through ICC connector available on the board

STEVAL-IPE007V1

Data Brief

STEVAL-IPE007V1

Description

The board can be used to develop a single-phase
power / energy meter with tamper detection based
on ST7FLITE. It measures active power, voltage,
current, power factor and line frequency in a
single-phase distribution environment and
displays these parameters in addition to current
date and time. It differs from ordinary single-phase
meters because it uses two current transformers
(CT) to measure active power in both live and
neutral wires. This enables the meter to detect,
signal, and continue to measure the active energy
consumed reliably even after the meter has been
tampered. ST7FLite20 is the microcontroller used
to perform all the measurements in the meter.
This means there is no ASSP (Application
Specific Standard Product) used for energy
measurement. The active energy consumed is
available in the form of frequency-modulated
pulse outputs and the accumulated active energy
is displayed on the LCD display module
(GDM093).

July 2007 Rev 1 1/8

For further information contact your local STMicroelectronics sales office

www.st.com

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Board schematic STEVAL-IPE007V1

1 Board schematic

Figure 1. Block diagram

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STEVAL-IPE007V1 Board schematic

Figure 2. Connectors

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