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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PM9904BPD 데이터시트(PDF) 1 Page - Sames |
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PM9904BPD 데이터시트(HTML) 1 Page - Sames |
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1 / 22 page  FEATURES + Designed to be used together with accompanying software as fully functional three phase trivector meter. + Better than class 1 operation. + + Two on-board LED’s for active and reactive pulse output. + 3 Phase 4 wire configuration. On board power supply. sames sames PM9904BPD SK1 Power Supply SA9904A Resistor Network VDD GND VSS CT1 CT2 CT3 LCD DISPLAY GND Resistor Network Resistor Network SA8807A JP1 Test Pins F50 VDD JP2 JP3 Test Pins VDD PCVDD VSS PCVSS J12 PCVDD JP4 SK3 PCVSS PCVSS PCVSS + On-board LCD display. + On-board current transformers. + Isolated connection to PC parallel port. + Easy accessible test pins. + Micro-controller plug-in support DESCRIPTION This application note describes the PM9904BPD evaluation board and together with the SA9904B data sheet provides a complete evaluation platform. The SA9904B is an accurate bi- directional power / energy measurement IC with serial (SPI) interface measuring active as well as reactive power / energy, RMS voltage and frequency. More detailed information specific to the of SA9904B can be found in its datasheet. The PM9904BPD module is designed for a three-phase four- wire applications, referenced to neutral. The mains voltages easily connect to module by way of a Molex connector (SK1). The 3 on-board current transformers measures the current in each phase. A simple capacitive power supply supplies the energy metering IC with power. The LM431 regulators are used to generate a 5 V supply voltage for the on-board opto- couplers. Provision has been made to connect an external 5V power supply to drive the isolated opto-coupler. The SA9904B forms the energy/power metering front-end of the module and connects to the SPI bus. Sharing the SPI bus is the SA8807A LCD driver which is capable of driving 96 segments on a 4 back plane LCD. The PM9904BPD evaluation board is configured and calibrated via the parallel port of a PC. The data interface between the evaluation board and the PC is fully isolated. The PM9904BPD module can easily be connected to a micro- controller. The SAMES micro-controller board connects to the evaluation module by means of JP1 thereby creating a complete power meter without the PC interface. Physically the micro-controller board plugs into the evaluation module with its opto-coupler facing the mains connector (SK1). It shares the SPI bus with the SA8807A onboard LCD controller. Evaluation Board for the SA9904B Energy Metering IC 1/22 Figure 1: Block diagram SPEC-0448 (REV. 6) 19-06-02 |
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