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Application Note: Energy Meter Evaluation Module PM9607AP
INTRODUCTION
This Application Note describes the functionality of the SA9607M and the SA9607P metering integrated circuits using the PM9607AP evaluation module. The SA9607 family is a low cost solution specifically designed to meet the needs of markets that require both live and neutral energy measurement, in order to detect possible meter tampering. Using the SA9607 family the meter manufacturer is able to build a meter that measures the energy consumption, even during a tamper condition, and records it to a mechanical counter. This application note will focus on the practical use of the SA9607 family. More detailed information specific to the SA9607M or SA9607P can be found in the applicable datasheet. meter configurations possible with the SA9607M using the PM9607AP module. Note that the values of the current transformer's resistor values need to change to make some of the rated conditions possible. This will be covered in the Analog Section. Setting 20A / 230V 40A / 230V 60A / 230V 1 pulse / kWh 10 pulse / kWh 100 pulse / kWh Pin Status RATED = 0 RATED = Open RATED = 1 MP1 = 0, MP0 = 0 MP1 = 0, MP0 = 1 MP1 = 1, MP0 = 0
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THE SA9607 SERIES ENERGY METER ICS
The SA9607 family is characterized by its ability to measure live and neutral power consumption simultaneously. A correctly installed meter should measure equal amounts of power consumption in the live and neutral phases. During meter tampering the two measurements are no longer equal. The SA9607 will use the larger of the two currents for the energy measurement. Differences of more than 12% between the live and neutral power measurements are indicated on the SA9607's ELT output which can drive a LED directly. The SA9607 are designed to drive mechanical counters directly. The module is fitted with an impulse type counter that increments with a single 71ms pulse. The SA9607 can also drive low cost mechanical counters (stepper motors) that use two consecutive pulses with opposing voltages to advance the counter one position. The SA9607 outputs these two opposing pulses in close succession, minimizing the chance of the stepper motor being in the wrong phase after a power failure. Calibration pulses, reverse power, earth loop tamper and active channel are displayed with four LEDs fitted on the module.
Table 1: A summary of the pin settings possible with the SA9607M. Pin status 0 indicates connects to VSS and 1 indicates connection to VDD
THE SA9607P MONOCHIP METER WITH ON CHIP CALIBRATION
The SA9607P uses an external EEPROM to store calibration data as well as meter specific settings. A major advantage of the SA9607P is that no external trim-pots or resistor ladders are required to calibrate the meter. This greatly enhances the meter reliability and can improve meter production times if used in an automatic meter calibration system.
THE SA9607M PIN PROGRAMMABLE MONOCHIP METER
Using the SA9607M, the rated conditions of the meter as well as the LED pulse rate and counter resolution can be selected for a particular meter design. The meter manufacture is thus able to produce a range of meters utilizing the same counter and the same metering constant with a single integrated circuit. Calibration of the meter is done with trim-pots or resistor ladders. Table 1 gives a short list of all the possible
The SA9607P integrated circuit together with an external EEPROM provides more meter setup features than the SA9607M. Additional information regarding the meter (serial numbers, client, and manufacture date) can also be stored in the unused sections of the EEPROM memory. An IIC bus based EEPROM is used to store configuration and meter setup data for the SA9607P. The SA9607P will load this data from the EEPROM during power up. During normal meter operation it reloads periodically the data from the EEPROM. The SA9607P never writes to the EEPROM. For more specific configuration information please refer to the SA9607P datasheet.
SPEC-0045 (REV. 1)
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PM9607AP MAINS CONNECTION TO MODULE
The PM9607AP module connects directly to live and neutral on CON1. The module is referenced to neutral and should be kept in mind when connecting test equipment to the module. CON2 is used for in circuit programming of the EEPROM (U3) when the SA9607P is used. The connector does not have any significance when a SA9607M device is used in the module. Name Function Description Con1 Connector for the 220VAC power for the module Con2 Connector for the opto isolator module SA9607M
1 2 Live Neutral
Live Neutral
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Load
SA9607P
1 2 Live Neutral
VDD CNF SCL SDA FOUT DIRO VSS
Not used
Figure 1: Connection diagram for normal metering application
Table 2: Connector Descriptions
MODULE SETUP
The PM9607AP module is setup for use with the SA9607M integrated circuit. Resistor values used on the module is calculated for rated conditions of 60A/230V and the counter resolution pin programming is set for 100 pulses/kWh. Name J1 J2 J3 J4 J5 J6 J7 J8 J9 J10 and J11 Function Description Connect pin 18 to DIR LED Connect pin 17 to ELT LED Connect pin 16 to SEL LED Connect pin 13 to Calibration LED Rated condition select jumper, pin 15 Motor pulse rate select jumper, pin 7 Motor pulse rate select jumper, pin 6 Connect one terminal of a Low Voltage stepper to pin 18, the terminal of the stepper is always connected to pin 9. Connect impulse counter to pin 12 Test pins are placed next to the digital pins of the SA9607
IIP1 1/14 3 IIN2 4 5 6 7 8 9 10 1 IIN1 2 GND IVP DIRO IIP2 ELT VREF SEL1 MP1/SCL RATED/CNF MP0/SDA VSS VDD LED MON MOP OSC2 OSC1 29 19 18 17 16 15 14 13 12 11
SA9607M setting
SA9607P setting
+
+
+ + +
+
J10
J11
Table 2: Jumper settings for various device options
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PM9607AP USING THE SA9607P IC
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The EEPROM on the SA9607AP module may be programmed in circuit with the use of a PC and a IIC interface module. The interface module is available from SAMES and includes a IIC interface, a 7 way connector cable as well as all the components needed to convert the module to a trim pot less meter. Figure 2 show how to connect the metering module, interface module as well as the PC.
Live Neutral
Load
Figure 2: PM9607AP mains connections as well as PC programming setup
To use the PM9607AP module with a SA9607P integrated circuit the following components need to be changed: n Insert the EEPROM from socket U3. n Replace termination resistors R16 and R7 with 3.6W resistor.* n Remove Channel 2 trim-pot P1.* n Remove P2 trim-pot. Short-circuit the trim-pot footprint.* n Replace resistor R17 with a 24K resistor.* n Remove jumpers J5, J6 and J7. n Resistor R22 must be fitted if EEPROM will be programmed in circuit. * Component change is only require if the module should not contain any trim-pots.
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PM9607AP MODULE OVERVIEW
ANALOG SECTION
The analog (metering) interface described in this section is designed for measuring 230V/60A with precision better than Class 1. The most important external components for the SA9607 integrated circuit are the current sense resistors, the voltage sense resistors and the bias setting resistor. The resistors used in the metering section should be of the same type so temperature effects are minimized. Current Input IIN1, IIP1, IIN2, IIP2 Two current transformers are used to measure the current in the live and neutral phases. The output of the current transformer is terminated with a low impedance resistor. The voltage drop across the termination resistor is converted to a current that is fed to the differential current inputs of the SA9607.
Neutral Line CT1 R7 3.6R Neutral Load Live Line GND Phase 1 CT2 R16 6.2R Live Load Phase 2 P1 10R GND R11 2.7k IIP2 R8 2.7k R9 2.7k R10 2.7k IIP1 IIN2 IIN1
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The termination resistor on the second current channel is adjustable by means of P2 to facilitate channel equalization calibration. The termination resistor is chosen so that a 10W trimpot in parallel will provide a sufficient channel range. Current Sensor Input Resistors The resistors R8, R9 and R10, R11 define the current level into the current sense inputs of the SA9607. The resistor values are selected for an input current of 16A on the current inputs of the SA9607 at rated conditions. For a 60A meter at 2500:1 CT the resistor values are calculated as follows: R8 = R9 = ( IL / 16A ) x RSH / 2 = 60A / 2500 / 16A x 3.6W / 2 = 2.7kW IL = Line current RSH = CT Termination resistor 2500 = CT ratio The two current channels are identical so R8 = R9 = R10 = R11. Voltage Input Ivp The voltage input of the SA9607 (IVP) is driven with a current of 14A at nominal mains voltage. This voltage input saturates at approximately 17A. At a nominal voltage current of 14A allows for 20% overdriving. The mains voltage is divided with a voltage divider to 14V that is fed to the voltage input pins via a 1MW resistor. Voltage Divider The voltage divider is calculated for a voltage drop of 14V. Equations for the voltage divider in figure 4 are: RB = R1 + R2 + R3 + R4 RB = R6 || R5
DR-01576
Figure 3: Current input configuration CT Termination Resistor The voltage drop across the CT termination resistor at rated current should be at least 20mV. The CTs have low phase shift and a ratio of 1:2500. The CT is terminated with a 3.6W resistor giving a voltage drop of 86.4mV across the termination resistor at rated conditions (Imax for the meter).
Live
R4 10R/2W TZ1 TZ
R1 120k
R2 120k
R3 120k R5 24k
C4 1u/16V
+
R6 1M IVP
DR-01577
Neutral GND GND GND
Figure 4: Mains voltage divider
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PM9607AP
Combining the two equations gives: ( RA + RB ) / 230V = RB / 14V Values for resistors R4 = 10W , R5 = 24k W chosen. Substituting the values result in: RB = 23.437kW RA = RB x ( 230V / 14V - 1 ) RA = 361.607kW .
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and R6 = W 1M is Protection A MOV together with R4 protects the transformer and the voltage divider circuit against voltage transients. Common mode and asymmetrical transients are attenuated by the current setting resistors R8, R9 R10 and R11.
POWER SUPPLY
Standard resistor values of R1, R2, R3 and R4 are chosen to be 120kW , 120k , 120k and 10 . W W W The capacitor C4 is used to compensate for phase shift between the voltage sense inputs and the current sense inputs of the device, in cases where CTs with phase errors are used. The phase shift caused by the CT may be corrected by inserting a capacitor in the voltage divider circuit. To compensate for a phase shift of 0.18 degrees the capacitor value is calculated as follows: C = 1 / (2 x p x Mains frequency x R5 x tan (Phase shift angle)) C = 1 / ( 2 x p x 50 x 1M tan (0.18 degrees )) W C = 1.013F Reference Voltage VREF The VREF pin of the SA9607 is connected to a resistor that determines the on chip bias current. The PM9607AP module is set up for the SA9607M, so the bias resistor is made up of resistor R17 and trimpot P1 in series. The multi turn trimpot P1 may be varied for precise calibration. Calibration of the bias current is not necessary when using the SA9607P as device calibration is loaded from the external EEPROM. Ground GND The GND pin of the SA9607 is connected to the neutral phase, which is halfway between VDD and VSS. Note that supply bypass capacitors C1 and C2 are positioned as close as possible to the supply pins of the device, and connected to a solid ground plane.
The PM9607AP module uses a transformer based power supply to ensure flexibility for different counter drive configurations. The maximum current that can be drawn by the circuit is as follows: The average power consumption of the module is usually less. The current indicated in table 2 is worst-case peak pulse current. The normal operating current of the module is closer to 15mA. A 78LC05-voltage regulator is used to regulate the voltage from the transformer. Two resistors R18 and R19 generate the analog ground voltage for the SA9607. The SA9607 operates between 5 Volt and 0 Volt with its GND pin connected to mid-rail.
Source SA9607M/P IC DIR LED SEL1 LED ELT LED Pulse LED Counter GND ref EEPROM Total
Max current 5 5 5 5 5 11 3 2 41
Unit mA mA mA mA mA mA mA mA mA
Table 4: Maximum peak current drawn by components on the module
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PM9607AP IN CIRCUIT EEPROM CONFIGURATION
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ISOLATED PC INTERFACE MODULE
OPERATION
The isolator module connects to a standard PC printer port by means of an extender cable on the one side and to the PM9607AP on the other side. The PC is completely isolated form the evaluation module and can be used to program the EEPROM on the PM9607AP module safely. The SA9607P is designed to be the bus master and does not support multi master mode. Resistor R22 is used to overdrive the clock signal of the SA9607P during programming.
The EEPROM remains on the PCB and is reprogrammed via the IIC bus.
No Name Function 1 VDD Positive supply 2 3 4 5 6 7 CNF A positive edge on CNF with DIRO high will trigger a configuration reload SDA Serial data pin SCK Serial clock pin FOUT LED pin of device DIRO DIRO need to be high before CNF is pulsed to trigger a reload VSS Negative supply voltage
Table 5: Pin description of the CAL connector
DIRO
CNF
DR-01578
Figure 5: Wave forms describing the configuration trigger
VDD TEST R4 2.2k 15 16 ILQ74 VSS SCL R1 11 12 ILQ74 Pin 4 SDO R10 220R R8 SDI 680R 4 3 ILQ74 O1B 14 13 VSS R2 470R R9 Pin 13 Pin 18..25 PC VSS O3 4N35 VSS FIN 680R O2 4N35 R3 470R
DR-01579
Pin 2
T1
R5 680R
8 7
O1D
10 9
U1 CNF
ILQ74 Pin 9 SCK R6 220R 1 2 O1A
U3 SCL R22 VDD Q1 BC327 DIRO 820R
U1 SCL
Pin 3
T2
R7 680R
5 6
O1C
R11 10k VSS SDA
4.7k
U1 DIRO
7 Core cable
VDD U3 SDA R21 U1 SDA
Pin 7..8 Pin 12
VDD
U1 LED FOUT
PC Printer Port
On Interface module
On PM9607AP module
Figure 6: Schematic diagram of the IIC opto-isolator module as well as relevant components on the PM9607AP module
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PM9607AP CALIBRATION AND SETUP
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Vnom and Ima x Vnom and Ima x make up the rated conditions of the module (SA9607P's Kr parameter). Vnom is the module's rated voltage and Ima xthe module's rated current. The PM9607AP module is designed for rated conditions of 230V/60A. The software defaults to Vnom = 230V and Ima x= 60A. LED Constant LED Constant selects the module's LED pulse rate (calibration LED), which is the SA9607P's CLED parameter. The options available are 6400 p/kWh or 3200 p/kWh. Entering a `0' will enable the 1252 pulses/second (at rated conditions) mode for fast calibration. Counter Resol. Counter resolution sets the modules counter resolution (SA9607P's CRES parameter). The options are 1,10 or 100p/kWh. Counter PW Counter PW set up the mechanical counter's pulse width (SA9607P's CPW parameter). The available options are 71ms and 142 ms. The PM9607AP module uses an impulse counter with a pulse width of 71ms. Channel1 Err / Channel2 Err The module may be calibrated by entering the percentage error in relation to a calibrated meter or Wh-Standard. The percentage error is calculated as follows: Error=(Energy from module - Real energy)/Real energy x 100
Software is available to setup and calibrate the SA9607P device. Download the SA9607P1.zip file from the SAMES web site. From the following URL: http://www.sames.co.za/emsoft/9607-1.zip The latest version of the evaluation software and source code is included in the zip file. The software was written with Borland C++ Ver 3 and should run on any PC with DOS operating system. The program was written as clear as possible so that it can easily be modified for specific needs. Start the program from the DOS prompt with: c:\>sa9607p 1 1000
NAVIGATING
Use the cursor keys to move up and down between the parameters listed under the "SA9607P Meter Parameters" section. Press Enter on the parameter that needs to be changed. The options available will be displayed. Type in the correct option or value and press Enter again. The new setting will be displayed. A detailed description of the parameters listed on the screen are described in the SA9607P datasheet. The following is a description of the functionality of the SA9607P Meter Parameters, displayed on the PC's screen, figure 7.
Figure 7: Screen capture of the SA9607P setup program
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PM9607AP
For module calibration use Channel Sel. (below) to switch to one of the two channel permanently. Calibrate the channel and switch to the next channel. Calibrate the channel and set Channel Sel to automatic for normal meter operation. This is equal to the SA9607P's Kc parameter, which is used for channel balance. Channel Sel. The channel select parameter selects the source for energy metering. (SA9607P's CS parameter). The options are `0' for automatic, `1' for channel 1 and `2' for channel 2. Earth Leak The modules earth leakage compensation value is set up with this parameter. (SA9607P's Ne parameter). The options are `0' for a factor of 0.15, `1' for a factor of 0.076 and `2' for a factor of 0.032.
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PCB DESIGN
The module represents a Class 1 meter and is designed to demonstrate the functionality and performance of both the SA9607M and the SA9607P single phase metering circuits. The SA9607M requires external settings and gain adjustment. The SA9607P allows for complete digital calibration without any external adjustments. The board can be configured for either of the two ICs by means of jumper settings. The module is a demonstration unit as well as a reference point for the meter manufacturer. All the digital pins of the device have at least one test point. Jumpers isolate LED's and counters from the device
GROUND PLANE
LIST MEMORY
The memory map, as calculated from the settings in the program, is listed by pressing "l". It does not show the content of the EEPROM.
The groundplane, which is connected to neutral, protects the device from external noise and is used to connect the power supply bypass capacitors C1 and C2. On the current input resistors and the CT termination resistor loops are introduced to cancel out the signal induced by the transformers magnetic field. The 5V supply is de-coupled and routed directly to the power pins of the IC. P2 is connected with a separate track to the VSS pin of the SA9607.
WRITE TO EEPROM
Pressing "w" writes to the EEPROM. The EEPROM on the PM9607AP module will be updated with settings specified by the program.
DEVICE RELOAD TRIGGER
Pressing "t" triggers a reload. The SA9607P is triggered and reloads the parameters from the EEPROM. The SA9607P will reload the parameters every 1132 seconds.
READ FROM EEPROM QUIT THE PROGRAM
The contents of the EEPROM is displayed by pressing "r".
The program is exited by pressing "q".
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PM9607AP
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COMPONENT LISTS
The following component list covers all components fitted on the PM9607AP module as shipped and configured for the SA9607M device.
Symbol U1 IC2 D1, D2, D3, D4 R1, R2, R3 R4 R5 R6 R7 R16 R17 R8, R9, R10, R11 R12, R13, R14, R15 R18, R19 R20, R21 R22 C1, C2 C3 C4 C5 C6 LED1, LED2, LED3, LED4 T1 TZ1 CNT1 Con1 Con2 CT1, CT2 9 25 X1
Description SA9607M 78C05, Voltage regulator Diode, Silicon, 1N4148 Resistor, 120k, 1/4W, 1%, metal Resistor, 10R, 2W, Wire wound Resistor, 24k, 1/4W, 1%, metal Resistor, 1M, 1/4W, 1%, metal Resistor, 3.6R, 1/4W, 1%, metal Resistor, 6.2R, 1/4W, 1%, metal Resistor, 22k, 1/4W, 1%, metal Resistor, 2.7k, 1/4W, 1%, metal Resistor, 22k, 1/4W, 1%, metal Resistor, 680R, 1/4W, 1%, metal Resistor, 1k, 1/4W, 1%, metal Capacitor, 220nF Capacitor, 220nF Capacitor, 1uF, 16V, electrolytic Capacitor, 2200uF, 16V, electrolytic Capacitor, 220uF, 16V, electrolytic 3mm Light emitting diode Transformer, 230V/9V, 1.5VA S20K275 Impulse counter, Kuebler, K07.80 Molex 3 pin connector, 200 mil pin spacing Molex 7 pin connector, 100 mil pin spacing Current Transformer, TZ-76, PCB Mount Jumpers Header pins Crystal, 3.5795 Mhz
Table 6: Components for SA9607M functionality, 60A rated setup
Detail DIP-20
0R for SA9607M
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PM9607AP
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Description SA9607P 24C01A, IIC bus interfaced EEPROM Resistor, 3.6R, 1/4W, 1%, metal Resistor, 22k, 1/4W, 1%, metal Resistor, 24k, 1/4W, 1%, metal Resistor, 4.7k, 1/4W, 1%, metal Resistor, 1.6k, 1/4W, 1%, metal Multi-turn trim pot, 10R Multi-turn trim pot, 5k Table 7: Components for SA9607P functionality, 60A rated setup Detail DIP-20 Insert Insert Remove Insert Optional Insert Remove Link
The following component list covers components that need to be changed to use the module with the SA9607P device. Symbol U1 IC3 R7, R16 R17 R17 R20, R21 R22 P1 P2
Symbol O1 O2, O3 R1 R2, R3 R5, R7 R8, R9, R6, R10 R11 Q1 JP1 J1 SK2 6
Description ILQ74 4N35 Resistor, 4.7k, 1/4W, 1%, metal Resistor, 470R, 1/4W, 1%, metal Resistor, 680R, 1/4W, 1%, metal Resistor, 220R, 1/4W, 1%, metal Resistor, 10K, 1/4W, 1%, metal Transistor, BC327 Molex 7 pin connector, 100 mil pin spacing Molex 2 pin connector, 100 mil pin spacing DB25 PCB Mount, Female connector Header pins Table 8: Interface Module components
Detail DIP-16 DIP-16
T0, 92, PNP External 5V supply
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PM9607AP PCB LAYOUT
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Figure 8A: IIC Module Component layout
Figure 9A: PM9607AP Component layout
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PM9607AP
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Figure 8B: IIC Module Top Side
Figure 9B: PM9607AP Top Side
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PM9607AP
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Figure 8C: IIC Module Bottom Side
Figure 9C: PM9607AP Bottom Side
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PM9607AP SCHEMATIC
JP2 JUMPS3 JP3 JUMPS3
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VDD J1 2 1 CON2
T1
R5 680R
8 7
O1D
10 9 R4 2.2k VSS
TEST
ILQ74
SK2 1 14 2 15 3 16 4 17 5 18 6 19 7 20 8 21 9 22 10 23 11 24 12 25 13 PC
SCK
R6 220R
1 2
O1A
15 16
SCL
R1 R11 10k VSS 4.7k VDD Q1 BC327
ILQ74
T2
R7 680R 5 6 ILQ74 O1C 11 12
DIRO
SDO
R10 220R
4 3
O1B
14 13
SDA VDD TEST SCL SDA FOUT DIRO VSS
JP1 1 2 3 4 5 6 7 METER
ILQ74 R8
VSS VDD
SDI
680R
R2 470R
R9
O2 4N35 R3 470R GND O3 4N35 VSS
DR-01580
FIN
680R
FOUT
Figure 10: Schematic diagram of the IIC opto-isolator module
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PM9607AP
L
2
R4 10R/2W T1 TZ1 TZ R18 1k J10 TP15 J11 SCL_2 SDA VDD FMO OSC2 1 2 3 4 5 L R5 24k VSS
+ C4
D1 1N4148 C2 220n GND GND R19 1k C1 220n
D3 1N4148
GND
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CON1 L +UNREG GND Vin Vout 1 3 VDD U2 7805 TP1 VDD 1 2 Mains CON2
NEUTRAL
LIVE
p s
220u/16V 2200u/16V D2 1N4148 D4 1N4148 TP2 VSS 230/9
+
C5
+ C6
GND
DIRO PPDM2 VPDM CNF VSS FOUT PPDM1 OSC1
1 2 3 4 5 6 7 8 R
VDD CNF SCL SDA FOUT DIRO VSS
1 2 3 4 5 6 7 CAL
VSS R1 14V 1u/16V 120k 120k 120k CT1 R7 3.6R R8 1 IIN1 GND IVP DIRO ELT SEL1 RATED/CNF VSS VDD 9 SCL SDA 10 MON OSC2 SA9607M/P X1 OSC2 C3 820n MP0 MP1 VSS
Dr-01581
TP4 14V R3
R2
VDD LED2 DIR
Figure 11: Schematic diagram of the complete PM9607AP module
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U1 20 19 18 17 16 15 14 MP0/SDA LED MOP OSC1 OSC1 3.5795MHz 13 12 11 CNT1 FOUT PPDM1 DIRO PPDM2 VPDM CNF 2 IIP1 IIN2 IIP2 VREF MP1/SCL 3 4 5 SCL_2 6 7 8 R21 4.7k R22 1.6k R6 1M GND Phase 1 CT2 R10 2.7k R16 6.2R P1 10R GND VDD R20 4.7k U3 R17 22k 24C01A P2 5k J6 J7 1 2 3 4 VCC A0 TEST A1 SCL A2 VSS SDA 8 7 6 5 2.7k Phase 2 R11 2.7k R9 2.7k FMO
LED3 ELT R12 680R J1 DIR VDD VSS RATED R13 680R J2 ELT
LED1 SEL R14 680R J3 SEL
LED4 LED R15 680R J4 LED
J5
J8 MLV CNT2
J9 SLV
LIVE
6 5 4 3 2 1 .1
LV Stepper
6 5 4 3 2 1 .1
Counter VSS
NEUTRAL
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PM9607AP
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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: energy@sames.co.za
For the latest updates on datasheets, please visit our web site: http://www.sames.co.za. SOUTH AFRICAN MICRO-ELECTRONIC SYSTEMS DIVISION OF LABAT TECHNOLOGIES (PTY) LTD Tel: (012) 333-6021 Tel: Int +27 12 333-6021 Fax: (012) 333-8071 Fax: Int +27 12 333-8071
P O BOX 15888 33 ELAND STREET LYNN EAST 0039 REPUBLIC OF SOUTH AFRICA
33 ELAND STREET KOEDOESPOORT INDUSTRIAL AREA PRETORIA REPUBLIC OF SOUTH AFRICA
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