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PM9904BPD Datasheet(PDF) 2 Page - Sames |
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PM9904BPD Datasheet(HTML) 2 Page - Sames |
2 / 22 page sames sames PM9904BPD 2/22 http://www.sames.co.za JUMPER SETTINGS 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. Figure 2: Jumper positions Voltage selection jumpers The following jumpers are used to select between 115V and 230V operation. When closed the series resistance in the voltage divider circuits to the voltage sense inputs are halved. Default Open. Jumper 230V OPEN OPEN OPEN J1 J2 J3 115V Closed Closed Closed Communication jumpers Jumpers J8 to J11 connect pull up resistors to the SPI inputs of the SA9904. The pull up resistors are required by the open drain outputs of the HCPL2631 opto-couplers. If a PC is used Jumper Description J12 PB (left connection) - Connects the push button output through a opto-coupler to pin 13 of the parallel port F50 (right connection) - Connects pin 7 of the SA9904 through a opto-coupler to pin 13 of the parallel port Parallel power supply jumper Jumper JP4 is used to select the power source for the opto- coupler U7. Power can be taken from the PC’s parallel port or from an external 5 volt supply via SK3. Jumper Description JP4 Left connection - Power for U7 is taken from the PC’s parallel port (pins 1, 14,16,17) Right connection - Connects U7 to SK3. An external power supply can be connected to SK3 to power U7. Jumper Description J4 J5 J6 Connects VDD to the metering circuitry. Default closed Connects VSS to the metering circuitry. Default closed GND connection point. J7 Connection point between the power supply GND (N) and the SA9904 GND. Default closed with the PM9904BPD module the jumpers must be closed, and can be left closed in the case of the SAMES micro-controller board. This board is capable of driving the SPI bus in this state. Default Closed. An additional output from the module is made available to the parallel port of the PC. The output can be selected to be the SA9904B’s F50 output or it can be selected to be the modules push button output. sames PM9904AP JP4 J12 J8 J9 J10 J11 JP1 J3 J2 J1 J7 J6 GND J5 J4 Push button SK2 PB F50* VSS VDD Micro board *On some pcb’s this may be labled as PB / F150, however f50 and f150 is the same connection. |
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