PM9110BFA SAMES | Alldatasheet
Document overview
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Technical content
FEATURES
! Performs bidirectional energy metering and includes a 7 digit LCD driver with announciators ! 4 externally selectable on-chip tariff reg- isters ! An additional total energy register ! Meets the accuracy requirements for Class 1 AC Watt hour meters ! Optical interface for electronic reading according to IEC1107 Mode D ! Pulse output for calibration ! Total power consumption rating below 100mW ! Uses current transformers for current sensing ! Operates over a wide temperature range ! Demonstration software included MONOCHIP THREE PHASE BIDIRECTIONAL KILOWATT HOUR METERING MODULE PM9110BFX PDS038-SA9110A-001 REV. 2 28-06-00 SA9110A APPLICATION NOTE PM9110BF
DESCRIPTION
The SAMES monochip three phase bidirectional kilowatt hour metering module, the PM9110BF, provides all the required metering functions including energy measure- ment, a 7 digit LCD driver, a tariff selection facility, an optical port as well as a pulse output for calibration purposes. Energy consumption is determined by the power measurement being integrated over time. This method of calculation takes the power factor into account. This application utilises the SAMES SA9110AFA monochip three phase bidirectional kilowatt hour metering IC for energy measurement.
ABSOLUTE MAXIMUM RATINGS* Parameter Symbol Min Max Unit Supply Voltage (Note 1) V AC 540 V Storage Temperature T STG -25 +125 °C Operating Temperature T O -10 +70 (Note 2) °C Note 1: Voltages are specified with reference to Neutral Note 2: The SA9110A integrated circuit is specified to operate over the temperature range -10°C to +70°C. The module functionality will, however, depend upon the external components used. *Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only. Functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification, is not implied. Exposure to Absolute Maximum Ratings for extended periods may affect device reliability. SA9110A 5V POWER SUPPLY SUPPLY DR-01103 LOAD DISPLAY EXTERNAL POWER SUPPLY BATTERY BACKUP OPTICAL PORT PDTA PGM PCLK SCROLL RESET TARIF SELECT ISOLATED CALIBRATION INTERFACE PULSE OUTPUT
ELECTRICAL CHARACTERISTICS
(Over the temperature range -10°C to +70°C, unless otherwise specified. Power consumption figures are applicable to the PM9110BFE only.) Parameter Symbol Min Typ Max Unit Condition Supply Voltage (x3 Phase) V AC 180 230 265 V PM9110BFE(Continuous) Power Consumption 100 mW From external power supply Isolation Voltage1 VIS 2500 V Continuous Opto-coupler Output Current IO 10 mA V OL = 1V Opto-coupler Input Current II 10 mA Note 1: Isolation voltage may be specified, depending on customer requirements. PIN DESCRIPTION Designation Description SK1 Isolated programming interface 5-Pin Header connector SK2 Isolated pulse output 2-Pin Header connector MAINS Voltage Supply Connected to Phase 1 Voltage Supply Connected to Phase 2 Voltage Supply Connected to Phase 3 Voltage Supply Connected to Neutral Line (common) CT1 Phase 1 (Orientation indicated on PCB) CT2 Phase 2 (Orientation indicated on PCB) CT3 Phase 3 (Orientation indicated on PCB) POWER 5V DC Supply Voltage 0V DC Supply Voltage
- Energy Calculation This Application Note should be read in conjunction with the SA9110A Data Sheet. In the Application Circuit (see Figure 2), the output current from the current sensors will be between 0 and 16µARMS. The current input stage of the module saturates at input currents greater than18µARMS. The mains voltage (Voltage + 15% - 20%) is used to perform the energy calculation, together with the current information from the current sensor (current transformers). The SA9110AFA integrated circuit may be adjusted to accomodate any voltage or current values. The method for calculating external component values is described in section 9 (Circuit Description). The accumulated energy is directly displayed on a 7 digit LCD. This unique application offers a host of additional features, which are dealt with below. 2. Electrostatic Discharge (ESD) Protection The device's inputs/outputs are protected against ESD. The modules resistance to transients will be dependant upon the protection components used. 3. Power Consumption The overall power consumption rating for this power metering application (Figure 2), is under 100mW, excluding the current sensors. 4. Isolation The programming interface and pulse output are isolated from the module which is at mains potential, via opto-couplers. 5. Isolated Programming Interface This isolated interface is provided to allow the user to programme the tariff register values, calibration constants and manufacturer/meter identification codes. This port is enabled by inserting the jumpers J8, J9 and J10. The programming may be performed via the parallel port of a personal computer. The designation of the pins on connector SK1 are given below:
PM9110BF PC Parallel Connectors (Suggested) Pin Description Pin Description
1 GND 18 GND
3 PCLK 4 D3
4 PDTA 5 D4
5 PGM 3 D2
Note: The recommended connections above are applicable for the demonstration software provided with the PM9110BF. 6. Optical Port The optical port has been designed to meet the IEC1107 Mode D specification. This facillity offers a pulse output as well as a serial data meter reading facility. Three types of interfacing elements from the PM9110BF are available: a) Infra-red optical port b) Red LED c) Opto-coupler In order to maximise the intensity of the element, it is suggested that only one of the outputs be used at any one time. Jumper Element J5 Opto Coupler J6 Infra Red LED J7 Red LED 7. Liquid Crystal Display (LCD) The PM9110BF has a LCD comprising of seven digits with announciatiors. To cater for compatibility with future devices four jumpers are provided for backplane driving configurations. The PM9110BF boards are shipped to the customer with jumpers in a default configuration. 8. Tariff, Scroll and Reset Functions Tariff Selection A dual DIP switch provides the user with the facility to set the active tariff register in which consumption will be accumulated. The active register is indicated on the LCD.
The most important external components are: C7, C9, C10 and C11 are the outer loop capacitors for the integrated oversampling A/D converters. The typical value of C7 is 2.2nF and the value of C9, C10 and C11 is 560pF. The actual values determine signal to noise and stability performance. The tolerances should be within ± 10%. C4, C5, C6 and C8 are the inner loop capacitors for the integrated oversampling A/ D converters. The typical value of C4, C5, C6 and C8 is 3.3nF. Values smaller than 0.5nF and larger than 5nF should be avoided. Terminated current sensors (current transformers) are connected to the current sensor inputs of the SA9110A through current setting resistors (R8..R13). The resistor values should be selected for an input current of 16µA RMS into the SA9110A at the rated line current. Scroll Facility The 4 registers may be sequentially displayed by activating the scroll button. The contents of the register selected for display is retained on the display for a period of 10 seconds, provided that the push button is not activated during this period. After the 10 seconds has elapsed, the display defaults to the "active" register defined by the status of the tariff DIP switches. The register selected for display via the scroll button is indicated by the relevant announciatiors. Reset Function By pressing the Reset button the contents of the RAM of the SA9110A device is set to the default conditions. Jumpers J8, J9 and J10 must be removed to use this feature. It is strongly recommended that the provision of this facility is not made available on production meters. 9. Circuit Description The module is supplied from an external 5V DC supply.
The values of these resistors should be calculated as follows: Phase 1: R8 = R9 = (IL1/16mA) * R18/2 Phase 2: R 10 = R11 = (IL2/16mA) * R19/2 Phase 3: R12 = R13 = (IL3/16mA) * R20/2 Where ILX = Secondary CT current at rated conditions. R18, R19 and R20 = Termination resistors of the three current transformers. R1A+ R1B, R4 and R15 set the current for the phase 1 voltage sense input. R2A + R2B, R5 + P5 and R16 set the current for phase 2 and R3A+ R3B, R6 + P6 and R17 set the current for phase 3. The values should be selected so that the input currents into the voltage sense inputs (virtual ground) are set to 14mA RMS for rated line voltage. Capacitors C1, C2 and C3 are for decoupling and phase compensation. R7 defines all on-chip bias and reference currents. With R 7 = 24k Ω , optimum conditions are set. Any changes to R7 will affect the output quadratically (i.e: ∆R = +5%, ∆f = +10%). XTAL is a colour burst TV crystal (f = 3.5795MHz) for the oscillator. The oscillator frequency is divided down to 1.7897MHz on-chip and supplies the A/D converters and the digital circuitry. 10. Demonstration Software Serial communication with the SA9110A device is identical to the communication found on the Single Phase family member, SA9109A. For this reason the demonstration software for the Single Phase Application circuit is used for the Three Phase Application. The software package which accompanies the demonstration unit requires an IBM or compatible PC with MS-DOS installed. This software, supplied on a 1.44M 3½" disk, will allow the user to read and write settings from/to the demonstration unit. Ensure that the communication connectors are in place prior to start. Insert the diskette into the drive and at the DOS prompt, type A:SA9109 [enter] Context sensitive help screen for each input field or command prompt are available by invoking [alt] H or [F1] key. An introduction is available by pressing the [F1] key immediately after installation.
Figure 1: Connection Diagram
Figure 2: Application Circuit. SA9110AFA R18 R8 AGND SS DD DR-01105 D1R23 POWER C12 V C16 C15 C14 C13 BAT. + CT3 CT1 CT2 V R22 R7 VBA 38 CON1 CIP1 CIN1 COP1 181617 C9 C4 SSV VREF GND SS V R21 R13 R20 R12 R19 R10 R11 IIN3 DDV DD IIP3 V IIN2 IIP1 IIP2 IIN1 MAINS VSS R1A R3A R2A R1B R2B R3B VSS C3 R17 R16 R15 IVP3 PCLK PGM PDTA IVP2 IVP1 PB RESET J9J8J10 R29 R28 R27 13141211 56 4 1 3 S[7] 52 TotalT3T2T1 T4 COP2 CON3 CON2 CIP2 CIN2 COP3 45212015 CIN3 C11C10 C5 CIP3 CINP CIPP CONP COPP R[2] OSCO COFF R[0] R[1] OSCI I C - 1 R[3] S[0] S[1] S[2] S[3] S[4] S[5] S[6] XTAL J2J1 T3 COM T4 COST T2 TOTAL T1 COST V V
62 SD0
S[9] S[8] SR[0] NC10 NC13 NC24 NC26 NC44 NC9 SR[1] NC61 NC11 S[10] S[11] S[12] S[13] XXXXXXXX SCROLL TAR TAR 1016 9 2 1 RED_LED IR_LED SK1 2 87 4 5 SK2 X R26 R25 R24 .34 . ..25 SS Hz 321 Wh/imp kWsh % Erro r imp/kWh
20 LCD19
Parts List for Application circuit: Figure 2 Item Symbol Description Detail
1 U1 SA9110AFA PLCC-68
2 U2 ILQ74 (Quad opto-coupler) DIP-16
3 U3 4N35 (opto-coupler) DIP-6
4 XTAL Crystal 3.5795MHz Colour burst TV
5 R1A Resistor, 1%, ¼W, metal Note 4
6 R1B Resistor, 1%, ¼W, metal Note 4
7 R2A Resistor, 1%, ¼W, metal Note 4
8 R2B Resistor, 1%, ¼W, metal Note 4
9 R3A Resistor, 1%, ¼W, metal Note 4
10 R3B Resistor, 1%, ¼W, metal Note 4
11 R4 Resistor, 24k, 1%, ¼W, metal
12 R5 Resistor, 22k, 1%, ¼W, metal
13 R6 Resistor, 22k, 1%, ¼W, metal
14 R7 Resistor, 24k, 1%, ¼W, metal
15 R8 Resistor, 2.7k, 1%, ¼W, metal Note 1 16 R9 Resistor, 2.7k, 1%, ¼W, metal Note 1 17 R10 Resistor, 2.7k, 1%, ¼W, metal Note 1 18 R11 Resistor, 2.7k, 1%, ¼W, metal Note 1 19 R12 Resistor, 2.7k, 1%, ¼W, metal Note 1 20 R13 Resistor, 2.7k, 1%, ¼W, metal Note 1
21 R15 Resistor, 1M, 1%, ¼W, metal
22 R16 Resistor, 1M, 1%, ¼W, metal
23 R17 Resistor, 1M, 1%, ¼W, metal
24 R18 Resistor, 2.7 Ω , 1%, ¼W, metal Note 1 25 R19 Resistor, 2.7 Ω , 1%, ¼W, metal Note 1 26 R20 Resistor, 2.7 Ω , 1%, ¼W, metal Note 1
27 R21 Resistor, 820 Ω , 1%, ¼W, metal
28 R22 Resistor, 820 Ω , 1%, ¼W, metal
29 R23 Resistor, 2M Ω , 1%, ¼W, metal
30 R24 Resistor, 680 Ω , 1%, ¼W, metal
31 R25 Resistor, 2.2k Ω , 1%, ¼W, metal 32 R26 Resistor, 2.2k Ω , 1%, ¼W, metal 33 R27 Resistor, 2.2k Ω , 1%, ¼W, metal 34 R28 Resistor, 2.2k Ω , 1%, ¼W, metal 35 R29 Resistor, 2.2k Ω , 1%, ¼W, metal 36 P5 Potentiometer, 4.7k Ω Multi turn 37 P6 Potentiometer, 4.7k Ω Multi turn
38 C1 Capacitor, electrolytic, 1µF, 16V Note 2
39 C2 Capacitor, electrolytic, 1µF, 16V Note 2
40 C3 Capacitor, electrolytic, 1µF, 16V Note 2
41 C4 Capacitor, ceramic, 3.3nF 42 C5 Capacitor, ceramic, 3.3nF 43 C6 Capacitor, ceramic, 3.3nF
Parts List for Application circuit: Figure 2 (continued) Item Symbol Description Detail 44 C7 Capacitor, ceramic, 2.2nF 45 C8 Capacitor, ceramic, 3.3nF
46 C9 Capacitor, ceramic, 560pF
47 C10 Capacitor, ceramic, 560pF
48 C11 Capacitor, ceramic, 560pF
49 C12 Capacitor, 100µF, 16V
50 C13 Capacitor, 100nF Note 3
51 C14 Capacitor, 100nF Note 3
52 C15 Capacitor, 100µF, 16V
53 C16 Capacitor, 820nF
54 BAT Battery, 1.2V
55 IR LED Infrared light emitting diode
56 RED LED Red light emitting diode
57 Q1 Photo transistor
58 D1 Diode, 1N4148
59 D2 Diode, 1N4148
60 SCROLL NO, push button
61 RESET NO, push button
62 TARIFF DIP switch, 2 pole
63 LCD OEL-7678*
Note 1: Resistor (R 8, R9, R10, R11, R12 and R13) values are dependant upon the selected values of the current transformer termination resistors R18, R19 and R20 Note 2: Capacitor values may be selected to compensate for phase errors caused by the current transformers Note 3: Capacitor (C13) to be positioned as close to Supply Pins (VDD & VSS) of IC-1, as possible Note 4: See the table below detailing the component values for the selected voltage standard *The LCD display is available from: JEBON CORPORATION Unit 709, Poongsan Factoria Town, 1141-2, Baegsok-Dong, Ilsan-District, Koyangcity, Kyonggi-Do, 411-360, Korea Tel: +82-31-902-9161 (12 lines) Fax: +82-31-902-7775/7776 Web site: http://www.jebon.com
Item Symbol PM9110BFE PM9110BFA Detail 230V 115V
5 R1A 200k Ω 120kΩ
6 R1B 180k Ω 82kΩ
7 R2A 200k Ω 120kΩ
8 R2B 180k Ω 82kΩ
9 R3A 200k Ω 120kΩ
10 R3B 180k Ω 82kΩ
ORDERING INFORMATION
PM9110BFA 3 X 115V, 3 X 80A Module PM9110BFE 3 X 230V, 3 X 80A Module
Notes:
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 out web site: http://www.sames.co.za South African Micro-Electronic Systems (Pty) Ltd P O Box 15888, 33 Eland Street, Lynn East, 0039 Koedoespoort Industrial Area, Republic of South Africa, Pretoria, Republic of South Africa Tel: 012 333-6021 Tel: Int +27 12 333-6021 Fax: 012 333-8071 Fax: Int +27 12 333-8071 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.