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PM9904BPD Datasheet(PDF) 2 Page - Sames

No. de pieza PM9904BPD
Descripción Electrónicos  Evaluation Board for the SA9904B Energy Metering IC
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Fabricante Electrónico  SAMES [Sames]
Página de inicio  http://www.sames.co.za
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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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