ST STEVAL-IPE007V1 User manual

April 2006 Rev 2 1/14
UM0221
User manual
STEVAL-IPE007V1: Single-phase energy meter
with tamper detection based on ST7lite2x
Introduction
This user manual provides a description of a single chip energy meter, STEVAL-IPE007V1,
with tamper detection. The meter fulfills IEC 61036:1996 + A1:2000 static meter
requirements for active energy (classes 1 and 2) with Ib=10A and Imax=50A. It detects
signals from a few mA, and continues to measure accurately even under tamper conditions.
The bill of materials and board schematics are also provided in Appendix A and Appendix B.
www.st.com

Contents UM0221
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Contents
1 Hardware overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Appendix A Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Appendix B Board schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

UM0221 Hardware overview
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1 Hardware overview
The following figure shows both the external parts and the main layout of the components
across the board.
Figure 1. Energy meter
The parts are numbered as follows:
1. Current transformer
2. Power supply
3. LCD module
4. Analog switch
5. EEPROM
6. ST7Flite20 microcontroller
7. Operation Amplifier
8. Real time clock (RTC)
9. RTC Battery
The connection diagram is shown in Figure 2. It shows two current transformers, the LCD
display and the three LED’s used.
45679
8
2
3
1

Hardware overview UM0221
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Figure 2. Connection diagram of meter
The AC supply is connected to the power supply section of the energy meter. The power
LED glows when the supply is on.
There are two current transformers to measure current in phase and neutral wires
respectively.
The LCD module provides information about the kWh energy consumed, the input supply
voltage, the input current, the power factor as well as the current date and time.
The tamper LED glows if the meter is tampered.
Finally, there is a pulse count LED which glows with a frequency proportional to the
measured power. The proportionality constant can be set by the user.
LCD
CTP
Transformer Phase
Tamper
LED
Pulse
Count LED
Power
LED
Load
Transformer Neutral
CTN
Current
Phase
Mains
Current
AC
Neutral
Red wire
Black wire
Black wire
Red wire
CTN
JP1

UM0221 Revision history
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2 Revision history
Table 1. Document revision history
Date Revision Changes
07-Apr-2006 1 Initial release.
25-Apr-2006 2 Document watermark removed

Bill of materials UM0221
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Appendix A Bill of materials
Table 2. Capacitors
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
1Ceramic
C5,C6,C7
,C8,C9,C
10,C11,C
12
.1UF 50V NA SMD 8
2 Electrolytic C3 1000uF 25V NA -55°C to
+85°C Leaded 1
3 Ceramic C18,C19 22nF 50V NA NA SMD 2
4Ceramic
C14,C15,
C16,C17 22pF 50V NA NA SMD 4
5 Box C1 1uF 400V NA NA Leaded 1
6 Box C4 10nF 400V NA NA Leaded 1
7 Electrolytic C2 100uF 25V NA -55°C to
+85°C Leaded 1
8 Ceramic C13 10nF 50V NA NA SMD 1
8 Ceramic C20 NA NA SMD 1
Table 3. Resistors
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
1R1 82E 2W
-55°C to
+125°C Leaded 1
2 R4 150K 1/8W -55°C to
+125°C SMD 1
3 R2,R3 10K 1/8W -55°C to
+125°C SMD 2
4 R5 110K 1/8W -55°C to
+125°C SMD 2
5 R6 330K 1/8W -55°C to
+125°C SMD 2
5 R8 470E 1/8W -55°C to
+125°C SMD 1
6 R9 470E 1/8W -55°C to
+125°C SMD 1
7 R7 220E 1/8W -55°C to
+125°C SMD 1
8 R10 1.5K 1/8W -55°C to
+125°C SMD 1

UM0221 Bill of materials
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9 R11 51K 1/8W -55°C to
+125°C SMD 1
10 R12 16K 1/8W -55°C to
+125°C SMD 1
11 R13 0 1/8W -55°C to
+125°C SMD 1
12 R14 390E 1/8W -55°C to
+125°C SMD 1
13 R15 220E 1/8W -55°C to
+125°C SMD 1
14 R16 390E 1/8W -55°C to
+125°C SMD 1
15 R17 180E 1/8W -55°C to
+125°C SMD 2
15 R31 220E 1/8W -55°C to
+125°C SMD 2
16 R18 51K 1/8W -55°C to
+125°C SMD 1
17 R21 100K 1/8W -55°C to
+125°C SMD 1
18 R19,R20 2.2K 1/8W -55°C to
+125°C SMD 2
19 R22,R23 36E 1/8W -55°C to
+125°C SMD 2
20 R24,R25 1K 1/8W -55°C to
+125°C SMD 2
21 R26 1K 1/8W -55°C to
+125°C SMD 1
22 R28 1M 1/8W -55°C to
+125°C SMD 1
23 R29 100E 1/8W -55°C to
+125°C SMD 1
24 R27,R32 5.1K 1/8W -55°C to
+125°C SMD 2
Table 3. Resistors
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt

Bill of materials UM0221
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Table 4. Integrated circuits
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
1
Positive
voltage
regulator
U1 L78L05A
BZ
positive voltage
regulators
-40°C to
+125°C TO-92 1
2Op-Amp U2
TS1854AI
D
1.8V
input/output rail
to rail low
power
operational
amplifiers
-40°C to
+125°C SO14 1
3Micro
Controller U3 ST7FLIT
E20F2M
8-BIT MCU
with single
voltage flash
memory, data
EEPROM,
ADC, timers,
SPI
-40°C to
+85°C SO20 1
4 SL EEPROM U4 M95010-
WMN6E 1kb SPI Bus 2.5V to 5.5V NA -40°C to +85°C SO8 1
5Analog
Switch U5 HCF4066 M013TR
QUAD
BILATERAL
SWITCH
3V to 20V NA -55°C to
+125°C SOP14 1
6SerialRTC U6 M41T94
MQ6E
512 Bit (64 bit
x8) Serial RTC
(SPI) SRAM
2.7V to
5.5V NA -55°C to +125°C SOP14 1
7 LCD Module LCD GDM093 18x4 module 1
Table 5. Diodes
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
1Rectifier
Diode
D1,D2,D3
,D4 1N4007 NA
1000V
(Reverse
Voltage)
NA -65°C to
+175°C
Leaded,
DO-41 4
2 LED D5,D6,D7 LED 3mm NA NA NA NA Red LED
3mm 3
3 Zener diode ZD1 9.1V 1/2 W 1
4 Transistor Q1,Q2 BC547B
NPN Epitaxial
Silicon
Transistor
TO-92 2
5 Transistor
Q3 (Very
fast
switching
transistor)
PN2222A
NPN General
Purpose
Amplifier
TO-92 1

UM0221 Bill of materials
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Table 6. Metal oxide varistors
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
1 MOV MV1 400V 1
Table 7. Trim pot
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
1 TRIM POT R30 20K NA
Rectangu
lar,multitu
rn Trim
Pot
1
Table 8. Transformers and inductors
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
1Current
Transformer
5000 turns,
10/40 amp by
Genius
Electricals
2
Table 9. Crystals
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
1 Crystal Y1 KDS6J 16MHz NA NA 1
2 Crystal Y2 32.768kHz NA NA 1
Table 10. Ferrite beads
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
1Inductor
Chip Beads L1 220uH NA NA -40°C to +125°C Leaded 1
2Inductor
Chip Beads L2 1uH NA NA -40°C to
+125°C Leaded 1
Table 11. PCB
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
1PCB 92x62
mm 1

Bill of materials UM0221
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Table 12. Switches
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
1
Press
button
Switch
(Size
6.1mm x
6.1 mm)
S1 1
Table 13. ICP connector
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
1ICP
connector CON10A 1
Table 14. Rechargeable battery
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
1 Battery BT1 1
Table 15. Terminal
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
14-pin
terminal 60A,500V 1
Table 16. Bug stick, jumpers and wires
Item # Desc. Ref. Part # Value Voltage Rating Temp.
Range
Pack /
Type Qnt
115 pin
Bugstick 1
29 pin female
bog stick 1
31Jumper 1
4 Wires 60A,500V
5Red black
wire 1A, 500V