SA2005P

PM2005MP SAMES | Alldatasheet

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Technical content

FEATURES

/c43 /c43 /c43 /c43 /c43 /c43 /c43 /c43 Designed to be used as fully functional Watt-Hour meter. Better than Class 1 operation On-board power supply

3 Phase 4 Wire configuration

On-board current transformers Measured energy pulse output LED Individual phase direction indication Individual phase fail and error condition indication sames Evaluation Board for the SA2005M and SA2005P Energy Metering IC’s PM2005M/P SA2005M specific: SA2005P specific: /c43 /c43 /c43 /c43 Selectable dividing ratios for different rated conditions Selectable calibration LED resolution and assuming mode Calibration and setup data stored on an external EEPROM Flexible programmable features

DESCRIPTION

The SA2005M IC is a single-chip solution with pin programmable features. The SA2005P IC is also a single-chip solution and retrieves its configuration and calibration information from an external EEPROM. More detailed information specific to the SA2005M or SA2005P can be found in the applicable Datasheets. The PM2005M/P evaluation board has been designed to be a fully functional watt-hour meter for three-phase four-wire applications using either the SA2005M or SA2005P. The mains voltages easily connect to the module by way of a Molex connector (SK1). The 3 on-board current transformers measure the current in each phase. A simple capacitive power supply supplies the energy metering IC with power. The LM431 regulators are used to generate 5V supply voltage for the IC on the board. Figure 1: Block diagram SPEC-0506 (REV.3) 03-10-02 SK1 Power Supply SA2005M SA2005P ResistorNetwork VDD GND VSS CT1 CT2 CT3 GND ResistorNetwork Resistor Network VDD LED Stepper motor0 0 0 0 0 0 MOP MON Module Setup Jumpers / EEPROM VDD VSS LED PH/DIR PH1 PH2 PH3 DIR1VFAIL1 DIR2VFAIL2 DIR3VFAIL3

2/12http://www.sames.co.za SETTING UP THE PM2005M/P MODULE JUMPER DESCRIPTION Power Supply Jumpers The power supply jumpers are used to disconnect the on- board power supply, allowing the metering section of the circuit to be powered from an external power supply if required. Jumper http://www.sames.co.za Voltage Selection Jumpers These jumpers are used to select between 115V and 230V operation. When closed the jumpers will half the series resistance in the voltage divider to the voltage sense inputs. Connects VDD to the metering circuitry. Connects VSS to the metering circuitry. GND connection point. Connection point between the power supply GND (N) and the SA2005 GND Module Setup Jumpers Setup for use with the SA2005M Please note that only one jumper should be closed at any one time. Closing more than one jumper may short circuit the power supply. The following jumpers (S1 and S9) are used to set the various dividing ratios, resolution and summing modes. Jumpers S1 to S3 set the rated conditions dividing ratio (pin RA of the SA2005M). Jumper 230V Open Open Open 115V Closed Closed Closed State Only S1 closed Only S2 closed Only S3 closed Select a multiplying ratio of 3/3 Select a ratio of 1/3 Select a ratio of 2/3 multiplying multiplying VDD VSS PH/DIR=100Hz Floating Voltage Level on Pin 7 of the SA2005 Select a 1252Hz pulse rate at rated input conditions S1, S2 and S3 open Jumpers S4 to S6 set the calibration LED resolution (dividing ratio) as well as the summing mode (pin RE of the SA2005M). Please note that only one jumper should be closed at any one time. Closing more than one jumper may short circuit the power supply. Jumpers S7 to S9 sets the dividing ratio (counter resolution, pin IM of the SA2005M) for the SA2005M’s motor drive output. Please note that only one jumper should be closed at any one time. Closing more than one jumper may short circuit the power supply. Set-up for use with the SA2005P Jumpers S1 to S9 must be removed (open), so as not to influence the functionality of the IIC bus operation. Jumper S10 may be used on certain IIC EEPROMS to protect the data written to the EEPROM. This jumper must be opened when programming the EEPROM. State Only S7 closed Only S8 closed Only S9 closed 1 (100 pulse/kWh) 100 Test Mode (1 pulse/kWh) (10 pulse/kWh) VDD VSS PH/DIR=100Hz Floating Voltage Level on Pin 9 of the SA2005 S7, S8 and S9 open Dividing ratio (counter resolution) State Only S4 closed Only S5 closed Only S6 closed Absolute sum Total sum Total sum Absolute sum VDD VSS PH/DIR=100Hz Floating Summing Mode S4, S5 and S6 open LED dividing ratio Voltage Level on pin 8 of the SA2005

Connects the three phase 4 wire supply to the module. Programming interface for the IIC EEPROM. J8 (SA2005P only) sames PM2005M/P SK1 N PH3PH2PH1 J1J2J3 GND VSS VDD VSSVDD PH/DIR RA RE IM S2 S3 RA RE IM S4 S5 S6 S7 S8 S9 S10U2 VDD VSS SCL SDA RLOAD Figure 2: Jumper positions Note that the usual pull up resistors associated with devices on a IIC bus is integrated in the SA2005P IC. The SA2005P’s CL input is a weak driver and can be overdriven by any external signal. Loading of this pin with external circuitry may influence the SA2005P's ability to reload its registers from the EEPROM. Number Signal Name VDD VSS SCL SDA RLOAD SA2005P (U1) Pin 6 Pin 14 Pin 8 Pin 9 Pin 7 24C01 (U2) Pin 8 Pin 1, 2, 3, 4 Pin 6 Pin 5 NC

Referring to figure 9, capacitor C10 is charged through D2 during the positive half of the sine wave from the R29, C12 mains voltage dropper. Identical charging circuitry exists for the other two phases. During the negative sine wave, C11 is charged through diode D1. The unregulated voltage charged on C10 and C11 is limited to 47 V by means of zener diode D7. Resistors R32 and R33 act as current limiting resistors that feed the unregulated voltage to the positive and negative voltage regulators U3 and U4. The voltage regulators need a load capacitance of around 10µF (C8 and C9) to be in a stable operating region. C15 acts as a supply voltage storage capacitor. Jumpers J4, J5 and J7 allow the power supply to be completely disconnected form the metering section from the device. The module represents a Class 1 meter that is designed to demonstrate the functionality and performance of the SA2005M or SA2005P metering circuits. The SA2005M/P is single chip solution for a three-phase meter that drives a mechanical counter. When the meter PCB is designed, it should be taken into account that the SA2005 is a mixed signal integrated circuit and special care should to be taken with the power supply and signal routing to the device. The SA2005 should be protected from its measuring environment. This is achieved by using resistor dividers to scale all the SA2005 input signals. MOV's Z1, Z2, Z3 together with resistors R29, R30, R31 protects the power supply capacitors. The current setting resistors on the current sense inputs of the device attenuates common mode and asymmetrical transients. All the resistors connecting to the SA2005's current sense Protection Component placement inputs should be placed as close as possible to the SA2005. This eliminates the possibility of any stray signal coupling into the divided input signal. The GND pin of the SA2005 is connected to the neutral phase, which is halfway between VDD and VSS. Note that supply bypass capacitors C4 and C5 are positioned as close as possible to the supply pins of the SA2005, and connected to a solid ground plane. Capacitor C6 is positioned as close as possible to the supply pins of the device for proper supply bypassing. The 5V supply is de-coupled and routed directly to the power pins of the IC by means of capacitor C5. Care is taken not to have current flowing in the node that connects the voltage reference resistor to VSS as it may introduce power supply noise on the voltage reference circuit. Most of the signal routing is done in such a manner that any signal coupling in to the measured signal will be a common mode noise signal and is rejected subsequently. Care should be taken that the signals to the SA2005 is not influenced by other sources such as transformers with electric fields coupling in to the signals. Calibration can be done by adjusting the trimpots (P1, P2, P3) connected to the three voltage inputs. Ground Plane Power Supply routing and de coupling Signal Routing Calibration 230 230 230 230 230 230 PH/DIR PH/DIR VDD PH/DIR VDD PH/DIR PH/DIR or VDD PH/DIR or VDD PH/DIR or VDD VSS or Open VSS or Open VSS or Open VDD VDD VDD VDD VDD VDD 3200 1600 1600 3200 3200 1600 800 400 400 200 200 100 Motor Pulse Rate (Pulses/kWh) LED Pulse rate (Pulses/kWh) IMRERAVmaxImax

7/12http://www.sames.co.za PM2005M/P COMPONENT LIST Capacitor Electrolytic Radial Capacitor Monolithic Ceramic Capacitor Monolithic Ceramic Capacitor Monolithic Ceramic Capacitor Tantalum Capacitor Electrolytic Radial Capacitor Polyester Capacitor Electrolytic Radial Rectifier Diode 47V Zener Diode LED 3mm Diameter, Red LED 3mm Diameter, Yellow LEC 3mm Diameter, Green

2 Pin Molex, Canter Square pin, Friction Lock

5 Pin Molex, Canter Square pin, Friction Lock

¼ Watt, 1% Metal Film Resistor ¼ Watt, 1% Metal Film Resistor ¼ Watt, 1% Metal Film Resistor ¼ Watt, 1% Metal Film Resistor ¼ Watt, 1% Metal Film Resistor ¼ Watt, 1% Metal Film Resistor ¼ Watt, 1% Metal Film Resistor

2 Watt, 1% Wire Wound Resistor

1 Watt, 1% Wire Wound Resistor

¼ Watt, 5%, Carbon Resistor Multi turn trim pot, Top adjust

7 Pin Molex, Canter square pin, Friction Lock

5 Pin Header

24 Pin IC Socket, Tulip Type

1k IIC EEPROM / Not fitted. For use with SA2005P 1:2500, Current Transformer Items Part Type 1µ / 16v / No Polarity 220n / 63v 1µ / 63v 100n 10µ / 16v 470µ / 25V 470n / 250VAC 470µ / 16V 1N4007 47V LED LED LED MOTOR OPTO Prog 2.7k 24k 22k 82k 100k 3R6 4 7 R/2W a t t 4 7 0 R/1W a t t 680R Pot 10k MAINS Prog S10 / 275 SA2005M or SA2005P 24C01A TL431 TZ76 Designator C1, C2, C3 C4, C5 C8, C9 C10, C11 C12, C13, C14 C15 D1, D2, D3, D4, D5, D6 L1, L2, L7 L3, L4 L5, L6 SK2 SK4 SK3 R1, R2, R3, R4, R5, R6 R8, R9, R10 R11, R12, R13 R14, R16, R18, R20, R22, R24 R15, R17, R19, R21, R23, R25 R26, R27, R28 R29, R30, R31 R32, R33 R34, R35, R36, R37 P1, P2, P3 SK1 Z1, Z2, Z3 U3, U4 CT1, CT2, CT3

9/12http://www.sames.co.za samesPM2005M/P Figure 8: PM2005M Silkscreen PCB layout SK4 Opto SK3 Prog SK2 Motor VSS DIR3 DIR2 DIR1 VDD CT3 CT2 CT1 Z3Z2Z1 IIC SK1 CNT1 C14C13C12 R31 R30 R29 c e v SS D PM2005M/P.PCB sames PH3 PH2 PH1 N PM2005M/ P FinishStart FinishStart FinishStart C15 R33 R32 C10 C11 D3 D4D2 D1 D6 D5 R17R21R25 J3 J2 J1R16R20R24R13 R15 R14 R19 R18 R23 R22 VFAIL1 VFAIL2 VFAIL3 GND R34 R35 R36 C1C6 R26 Phase 1 CalibratePhase 1 Calibrate R10 R28 R27 R12 Phase 2 CalibratePhase 2 Calibrate Phase 3 CalibratePhase 3 Calibrate R11 SA2005P SA2005M S10 VDD VSS SCL SDA RLOAD VDD VSS SCL SDA RLOAD K07.8/s LSD R37 Energy Per kWhEnergy Per kWh Pulses/kWh LED LED VDD VSS PH/DIR S1 S2 S3 S4 S5 S6 S7 S8 S9 RA RE IM RA RE IM Energy Direction per PhaseEnergy Direction per Phase

10/12http://www.sames.co.za PM2005M/P Figure 9: Schematic Diagram for Metering Section R8 1MR9 1MR10 1M R12 22kR11 22kR13 22k C5220nC4 220n VDD V1InV2 InV3 In C31uC2 1uC1 1u VSS C61u R263.6R CT1 TZ76 CT2 TZ76 CT3 TZ76 R273.6R R28 3.6R GND GND GND GND GND V3 OutV2 OutV1 Out VDD VSS Neutral GND 10k 10k 10k J7 N Node N GND PH3PH2PH1 R14 82k R18 82k R22 82k R15 100k R19 100k R23 100k R16 82k R20 82k R24 82k R17 100k R21 100k R25 100k JUMPS2 JUMPS2 C1 B1 A1 A2B2C2 JUMPS2 VSS O14N35 VDD 1 2SK4 Opto R37 680R IIP1 IIN1 IIP2 IIN2 IIP3 IIN3 VREF VSS IVN1 IVN2 IVN3 GND VDD PGM1 PGM0 FOUT DIR TCLK TEST U1 SA2005F LED R34680R PGM1 PGM0 VSS VSS VDD VSS J11 MICRO VDD VSS J10 OPTO/MICRO

11/12http://www.sames.co.za Figure 10: Schematic Diagram of Power Supply 1234 SK1 MAINS PH1 PH3PH2 VSS C810u C9 10u U3 TL431 U4 TL431 C10470/25V C11 470/25v D1 1N4007 C12 470nF/250V AC R29 47 C15470 R32 470/1W R33 470/1W VN Z1 S10/275 N D2 1N4007 D3 1N4007 C13 470nF/250V AC R30 47 Z2 S10/275 N D4 1N4007 D5 1N4007 C14 470nF/250V AC R31 47 Z3 S10/275 N D6 1N4007 N VP VDD PH1PH2 PH3 N J6 GND LL1 LL2 LL3 VDD VSS VD VS D747V

samesPM9607AP samesPM2005M/P DISCLAIMER: The information contained in this document is confidential and proprietary to South African Micro-Electronic Systems (Pty) Ltd ("SAMES") and may not be copied or disclosed to a third party, in whole or in part, without the express written consent of SAMES. The information contained herein is current as of the date of publication; however, delivery of this document shall not under any circumstances create any implication that the information contained herein is correct as of any time subsequent to such date. SAMES does not undertake to inform any recipient of this document of any changes in the information contained herein, and SAMES expressly reserves the right to make changes in such information, without notification, even if such changes would render information contained herein inaccurate or incomplete. SAMES makes no representation or warranty that any circuit designed by reference to the information contained herein, will function without errors and as intended by the designer. Any sales or technical questions may be posted to our e-mail address below: For the latest updates on datasheets, please visit our web site: (012) 333-6021 +27 12 333-6021 (012) 333-8071 +27 12 333-8071 energy@sames.co.za http://www.sames.co.za. SOUTH AFRICAN MICRO-ELECTRONIC SYSTEMS (PTY) LTD Tel: Tel: Int Fax: Fax: Int P O BOX 15888 LYNN EAST 0039 REPUBLIC OF SOUTH AFRICA

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