UM1082 User manual. The STPM10 single-phase meter evaluation boards. Introduction

Size: px

Start display at page:

Download "UM1082 User manual. The STPM10 single-phase meter evaluation boards. Introduction"

Adele Elliott
6 years ago
Views:

UM08 User manual The STPM0 single-phase meter evaluation boards Introduction The STPM0 and STPM0 devices are energy meter ASSPs (application specific standard products), which address to a wide range

1 UM08 User manual The STPM0 single-phase meter evaluation boards Introduction The STPM0 and STPM0 devices are energy meter ASSPs (application specific standard products), which address to a wide range of electricity metering requirements thanks to their built-in functions such as: signal conditioning, signal processing, data conversion, input/output signals, and voltage reference. The STPM0 is dedicated for peripheral use in microcontroller-based applications only, while the STPM0 works as a peripheral and as a standalone device, since it can permanently store configuration and calibration data. This user manual refers to the following STPM0 single-phase meter evaluation boards: STEVAL-IPE05V: STPM0 single-phase meter with two CTs STEVAL-IPE06V: STPM0 single-phase meter with CT and shunt STEVAL-IPE07V: STPM0 single-phase meter with shunt STEVAL-IPE08V: STPM0 single-phase meter with CT These metering modules can be used to build a Class 0.5 single-phase microprocessor-based meter, with or without tamper detection, for power line systems of V NOM =40 to 300 V RMS, I NOM /I MAX =/0 A RMS, f LIN =45 to 65 Hz and T AMB =-40 to +85 C. The reading of the following documents is recommended: STPM0 datasheet AN59 application note AN99 application note UM599 user manual UM750 user manual October 04 DocID8970 Rev /8

2 Contents Contents UM08 Getting started Safety rules Conventions... 3 Board setup Connection for board with two CTs (STEVAL-IPE05V) Connection for the board with CT and shunt (STEVAL-IPE06V) Connection for the board with shunt (STEVAL-IPE07V) Connection for the board with CT (STEVAL-IPE08V) Application configuration Microprocessor-based Communication with the module Module evaluation with PC through the STPMx evaluation software SPI communication Technical data Electrical parameters Schematics STEVAL-IPE05V STEVAL-IPE06V STEVAL-IPE07V STEVAL-IPE08V Mechanical outlines Power line system migration from 0 V, 50 Hz to 0 V, 60 Hz 6 8 Revision history... 7 /8 DocID8970 Rev

3 UM08 Getting started Getting started. Safety rules This board can be connected to the mains voltage (0 V/0 V). In the case of improper use, wrong installation or malfunction, there is a danger of serious personal injury and damage to property. All operations such as transport, installation, and commissioning, as well as maintenance, should be carried out by skilled technical personnel (national accident prevention rules must be observed) only. Due to the risk of death when this prototype is used on the mains voltage (0 V/0 V), skilled technical personnel only, who are familiar with the installation, mounting, commissioning, and operation of power electronic systems and have the qualifications needed to perform these functions may use this prototype. As the serial port P of the boards is not isolated, for PC connection through the parallel programmer/reader, the use of an isolated AC power supply to protect the parallel port and avoid board damage is strongly recommended.. Conventions In this user manual, the upper case is used to indicate the name of the pin of the module or the device or the corresponding signal; the underlined typeface is used to indicate the name of the configuration signal and italic is used to name software registers. The lowest analog and digital power supply voltage is called VSS. All voltage specifications for digital input/output pins are referred to as VSS. The highest OTP writing power supply voltage is VOTP. The highest power supply voltage of the device is VCC. Positive currents flow into a pin. Sinking means that the current flows into the pin while sourcing means that the current flows out of the pin. Timing specifications of signals are relative to the CLKOUT. This signal is fed by a 4.94 MHz onboard crystal oscillator. Timing specifications of the SPI interface signals are relative to the SCLNLC, which do not need to be in phase with CLKOUT. A positive logic convention is present in all equations. DocID8970 Rev 3/8

4 Board setup UM08 Board setup. Connection for board with two CTs (STEVAL-IPE05V) The connection of line signals to the module is shown in Figure : "Connection of two CTs to the power line":. The hot line voltage wire must be connected to pin F of the module. Normally, this wire is also connected to the hot line current wire but, during the production or verification phases, this wire may be connected to a line voltage source.. The neutral line voltage wire must be connected to pin N of the module. This wire is also connected to the neutral line current wire. 3. The hot line current wire must pass through the hole of the current transformer Tr becoming a hot load wire using an isolated 4 mm copper wire. 4. The neutral line current wire must pass through the hole of the current transformer Tr becoming a neutral load wire using an isolated 4 mm copper wire. Figure : Connection of two CTs to the power line. Connection for the board with CT and shunt (STEVAL- IPE06V) The connection of line signals to the module is shown in Figure : "Connection of CT + shunt module to the power line":. The hot line voltage wire must be connected to pin F of the module. Normally, this wire is also connected to the hot line current wire but, during the production or verification phases, this wire may be connected to a line voltage source.. The neutral line voltage wire must be connected to pin N of the module. This wire is also connected to the neutral line current wire. 3. The hot line current wire must be placed through the hole of the current transformer Tr becoming a hot load wire using isolated 4 mm copper wire. 4. The neutral line current wire must be connected to the pole of shunt which is close to pin N of the module using an isolated 4 mm copper wire. 5. The neutral load current wire must be connected to the pole of shunt which is close to the current transformer using an isolated 4 mm copper wire. 4/8 DocID8970 Rev

5 UM08 Figure : Connection of CT + shunt module to the power line Board setup.3 Connection for the board with shunt (STEVAL-IPE07V) The connection of line signals to the module is shown in Figure 3: "Connection of shunt module to the power line":. The neutral line voltage wire must be connected to pin N of the module. This wire is also connected to the neutral line current wire.. The hot line voltage wire must be connected to pin F of the module. Normally, this wire is also connected to the hot line current wire but, during the production or verification phases, this wire may be connected to a line voltage source. 3. The neutral current wire must be connected to the pole of the shunt which is close to pin N of the module using an isolated 4 mm copper wire. 4. The neutral load current wire must be connected to the pole of the shunt which is close to the edge of the module using an isolated 4 mm copper wire. Figure 3: Connection of shunt module to the power line DocID8970 Rev 5/8

6 Board setup.4 Connection for the board with CT (STEVAL-IPE08V) The connection of line signals to the module is shown in Figure 4: "Connection of CT module to the power line": UM08. The hot line voltage wire must be connected to pin F of the module. Normally, this wire is also connected to the hot line current wire but, during the production or verification phases, this wire may be connected to a line voltage source.. The neutral line voltage wire must be connected to pin N of the module. This wire is also connected to the neutral line current wire. 3. The hot line current wire must pass through the hole of the current transformer Tr becoming a hot load wire using an isolated 4 mm copper wire. Figure 4: Connection of CT module to the power line 6/8 DocID8970 Rev

7 UM08 Application configuration 3 Application configuration 3. Microprocessor-based In this type of application, a control board with a microprocessor should be connected to the male P connector of the module using a 0-wire flat cable. Table : "Pin number, signal name and signal description of connector P" below describes the signals corresponding to the pins of this connector. The four SPI signals are multipurpose pins and they actually reflect the functions of the corresponding pins on the onboard metering device. By using this type of connection, the control board is able to read data records or access configuration bits and mode signals of the metering device thanks to a dedicated protocol, it can draw up to 4 ma at +3.0 V from the module. Table : Pin number, signal name and signal description of connector P Pin Name Functional description of signal Not used Not used 3 Signal reference level 0 V and power supply return 4 SDA Digital I/O for SPI data signal or tamper indicator 5 SCS Digital for SPI enable signal 6 SCL Digital I/O for SPI clock signal or no load condition indicator 7 LED Device pulsed output 8 SYN Digital I/O for SPI data direction, latching request or negative power indicator 9 Not used 0 VCC Power out of +5.0 V. Up to 5 ma can be drawn from this pin This kind of application may still use any LED element of the module for the purposes shown in Table : "Pin number, signal name and signal description of connector P" or it may generate an alternative set of signals from the control board. In this case, the control board may also recalibrate any result read. DocID8970 Rev 7/8

8 Communication with the module UM08 4 Communication with the module 4. Module evaluation with PC through the STPMx evaluation software The metering module and the device features can be evaluated by a dedicated graphical user interface running on a PC. For this purpose, the module should be connected to the PC through a parallel programmer, shown in Figure 5: "Parallel programmer schematics" or to USB isolated hardware interface, available as a separate evaluation board with the code STEVAL- IPE03V. Figure 5: Parallel programmer schematics To communicate with the device through the evaluation software, the selected hardware programmer has to be connected to both the PC and the evaluation board. Please take care that pin of the cable is connected with the correct pin on the board, whose mark is printed on the PCB, close to the edge of the board. The correct connection for the STEVAL-IPE03V is shown in the picture below. 8/8 DocID8970 Rev

UM08 Communication with the module Figure 6: Connection of the module to the STEVAL-IPE03V If the parallel interface is used, the evaluation board must be powered on.

The evaluation software is available on http://www.st.com. 4. SPI communication A host system can communicate with the module using SPI signals and connect via the P connector.

9 UM08 Communication with the module Figure 6: Connection of the module to the STEVAL-IPE03V If the parallel interface is used, the evaluation board must be powered on. If the STEVAL- IPE03V is used, please make sure that jumper J4 is in -3 position, in this way it directly supplies the STPM0 evaluation board with 5 V. The evaluation software is available on 4. SPI communication A host system can communicate with the module using SPI signals and connect via the P connector. In fact, it communicates to the metering device, which is the key element of the module. This device always acts as an SPI slave while the host system acts as an SPI master. A control board of an application or an external system can be considered as a host. For details on SPI communication with the device please refer to the AN59 and to the device datasheet. DocID8970 Rev 9/8

10 Technical data UM08 5 Technical data 5. Electrical parameters Table : "Electrical parameters" summarizes the electrical parameters, which are specified for V CC = 3.6 V, T AMB = +5 C, unless otherwise specified. Symbol Target applications V NOM Parameter Nominal line voltage Table : Electrical parameters Test conditions or comments Min. Typ. Max. Unit V RMS F L Nominal frequency Hz I NOM I MAX T AMB Digital inputs I IL Nominal line current Maximal line current Ambient temperature A RMS 0 30 A RMS C Class of accuracy Pull-up Valid also for I/O pins when they are used as inputs V IL Voltage input low µa 0.5 V CC V IH Voltage input high 0.75 V CC 5.3 V Digital outputs V OL Voltage output low I OL = + ma 0.4 V V OH Voltage output high I OH = + ma V CC-0.4 V t TR Stepper outputs Transition time C L = 50 pf, V CC = 3. V V 5 ns V OL Voltage output low I OL = +4 ma 0. V CC V V OH Voltage output high I OH = +4 ma 0.9 V CC V t TR Power supply Transition time C L=50 pf, V CC=5.0 V 5 ns V CC Supply level V I CC Quiescent current ma V DDA Supply level V F L Nominal frequency Hz V CCPOR Power-on-reset.5 V 0/8 DocID8970 Rev

11 Current transformer A Current transformer A TR TR C5 nf C7 uf A C3 nf R3 4.7 C8 R5 4.7 R4 4.7 R7 8 W C6 uf R k C9 0nF R3 k C0 0nF R4 k R7 0K W5 W6 Stepper motor D6 D7 DIODE 600V A R M R0 M R8 0K DIODE 600V A + TP D 5.v R9 0K R.4k D3 A D R R6 0R D5. R3 R9 43K D4 R4 R5 390 C nf R5 00 C4 pf A Y R6 M A Vo SBS SDA SCS SCL LED SYN SBG MHz C3 pf UM08 Schematics 6 Schematics 6. STEVAL-IPE05V Figure 7: STEVAL-IPE05V schematic uf U + C4 P W W mains R7 0R R8 0R V L 0uH VARISTOR 300v R 4.7 R k C 470nF 630v LED WDG ZCR Vddd Vss Vcc Vdda Vo Ilp Iln STPM0 4700µF 8 Sda 9 Scl 3 Scs 5 Syn 5 7 CLKout 6 CLKin 4 Vin 4 3 Vip Iln Ilp L3 uh 0 GIPG300485LM DocID8970 Rev /8

12 A A A C8 uf R7 R k 8 W 470nF 630v D7 DIODE 600V A TP R9 0K L3 uh A R5 00 A A VO SBS SDA SCS SCL LED SYN SBG P Schematics 6. STEVAL-IPE06V Figure 8: STEVAL-IPE06V schematic UM Current Transformer W W mains R7 0R C5 nf TR RS SHUNT R8 0R V VARISTOR 300v C7 uf R3 4.7 L 0uH C3 nf R5 4.7 R3 k R4 k C6 uf R k C9 0nF C0 0nF R7 0K C W5 W6 Stepper Motor D R M R0 M R8 LED WDG ZCR Vddd Vss Vcc Vdda Vo Ilp Iln 0K U DIODE 600V A + C4 STPM0 4700µF D Sda 9 8 Scl Scs Syn CLKout CLKin Vin Vip Iln Ilp v R.4k D3 D R D5. R3 R6 0R R9 43K D4 R4 R5 390 C nf C4 pf Y MHz R6 M C3 pf 0 GIPG LM /8 DocID8970 Rev

13 A A C8 uf R k R7 8 W D7 DIODE 600V A TP R9 0K A R5 00 A A VO SBS SDA SCS SCL LED SYN SBG P UM STEVAL-IPE07V Figure 9: STEVAL-IPE07V schematic Schematics W W mains C5 nf R8 0R V RS SHUNT L 0uH VARISTOR 300v C7 uf C3 nf R3 k R4 k C6 uf R k C9 0nF C0 0nF R7 0K C 470nF 630v W5 W6 D6 Stepper motor R M R8 LED WDG ZCR Vddd Vss Vcc Vdda Vo Ilp Iln 0K DIODE 600V A + U STPM0 4700µF D Sda 8 9 Scl Scs Syn CLKout CLKin Vin Vip Iln Ilp v L3 uh R.4k D3 D R D5. R3 R6 0R R9 43K D4 R4 R5 390 C nf C4 pf Y MHz R6 M C3 pf 0 GIPG LM DocID8970 Rev 3/8

14 A A A C8 uf R7 8 W R k D7 DIODE 600V A TP R9 0K A A A Vo SBS SDA SCS SCL LED SYN SBG P Schematics 6.4 STEVAL-IPE08V Figure 0: STEVAL-IPE08V schematic UM Current Transformer W W mains R7 0R TR C5 nf V R8 0R VARISTOR 300v C7 uf L 0uH R3 4.7 C3 nf R5 4.7 R4 k C6 uf W5 W6 R k R R3 k C9 0nF C0 0nF R7 0K C 470nF 630v D6 Stepper motor M R8 0K DIODE 600V A R0 M LED WDG ZCR Vddd Vss Vcc Vdda Vo Ilp Iln + C4 U STPM0 4700µF D 5.v 8 Sda 9 Scl 3 Scs 5 Syn 7 CLKout 6 CLKin 4 Vin Vip 3 Iln Ilp L3 uh R.4k D3 D R D5. R3 R6 0R R9 43K R4 R5 390 D4 C nf R5 00 C4 pf Y MHz R6 M C3 pf 0 GIPG300444LM 4/8 DocID8970 Rev

15 UM Mechanical outlines Schematics The size of the PCB of the module can be seen below. The overall volume is determined by the size of the maximal element, which is the current transformer: L x W x H = 70 mm x 46 mm x 30 mm. Figure : Mechanical dimensions of PCB All measurements are given in mm View is from non-component side All high elements are dashed P has pins on both side All mounting holes are equal DocID8970 Rev 5/8

16 Power line system migration from 0 V, 50 Hz to 0 V, 60 Hz UM08 7 Power line system migration from 0 V, 50 Hz to 0 V, 60 Hz With capacitive power supply, the impedance of capacitor C and impedance of load ((V CC +0.7)/(I CC +I Z )) form a voltage divider. All other elements are needed for other reasons, such as: spike protection and HF rejection. Therefore, the following guidelines can be used. If the percentage of line frequency changes, the I CC changes the same percentage accordingly: df/f = d I CC / I CC For a 60 Hz system there is the 0% more current available because C impedance is the major component of the divider, the change of input voltage must be followed by the same change of C impedance, that is du/u = dzc/zc. For a 0 V system, the capacitor C is almost doubled, the divider must be designed to work properly at minimal line voltage, frequency and C and maximal I CC and therefore, the maximal allowable power consumption (500 mw > IZ * V CC ) of the Zener diode D must be checked at maximal line voltage, frequency and C and minimal I CC. According to the information below, with the change of power line system from 0 V, 50 Hz to 0 V, 60 Hz, the value of C should be changed from 470 nf, 75 V AC to 750 nf, 50 V AC. A 680 nf, 50 V AC element means about 0% less I CC. No other change to the metering module is necessary because the voltage measurement range is from 0 to 360 V RMS. The current measurement range is from 0. to 0 A RMS, till 30 A RMS. If a wider current range is needed, the current transformers and the cross-section of primary winding wires must be increased, by running the risk that they do not fit onto the board of the module. In this case, the module needs to be recalibrated. 6/8 DocID8970 Rev

17 UM08 Revision history 8 Revision history Table 3: Document revision history Date Revision Changes 3-Feb-0 Initial release. 3-Oct-04 Updated Table : "Pin number, signal name and signal description of connector P" and Table : "Electrical parameters". Updated Section.3: "Connection for the board with shunt (STEVAL-IPE07V)" and Section 4.: "Module evaluation with PC through the STPMx evaluation software". Changed Figure 3: "Connection of shunt module to the power line". Minor text changes. DocID8970 Rev 7/8

18 UM08 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. 04 STMicroelectronics All rights reserved 8/8 DocID8970 Rev

EVALSTPM32. Single-phase energy metering evaluation board with shunt current sensor based on the STPM32. Description. Features

EVALSTPM32. Single-phase energy metering evaluation board with shunt current sensor based on the STPM32. Description. Features EVALSTPM Single-phase energy metering evaluation board with shunt current sensor based on the STPM Description Data brief Features 0.% accuracy single-phase meter V nom (RMS) = 0 to 00 V, I nom /I max(rms)