PM9904BPD 查看數據表（PDF） - South African Micro Electronic Systems

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PM9904BPD

Evaluation Board for the SA9904B Energy Metering IC

South African Micro Electronic Systems 

PM9904BPD

sames

CONNECTOR DESCRIPTION

Jumper

Description

SK1 Connects the three phase 4 wire supply to the

module.

Female BD25pin connects the evaluation board to

SK2 the PC parallel port by a 1 to 1 cable. The module

is isolated from the PC by the opto-couplers.

SK3 5V supply to U7 opto coupler

JP1 This header strip can be used for measuring the

I/O pins of the SA9904B and SA8807. Note that

this connector is on the same potential as the

SA9904B. Provision is made for VDD and VSS

so that a board with a micro controller can be

easily fitted without any additional wiring. Signals

available on this connector are:

Pin number Signal SA9904 (U1) SA8807 (U2)

1

VDD Pin 6

Pin 13

2

VSS Pin 14

Pin 26

3

F50 Pin 7

NC

4

SCK Pin 8

Pin 18

5

CS

Pin 13

NC

6

MISO Pin 9

Pin 20

7

MOSI Pin 12

Pin 19

8

CE

NC

Pin 21

MISO - Master In Slave Out

MOSI - Master Out Slave In

Load

SETTING UP THE PM9904AP MODULE

Figure 3 below shows a typical setup for the PM9904BPD

evaluation module. The three phase voltages are connected

directly to SK1 and each corresponding phase current is wired

through the on-board CT’s. An external power supply can be

connected to SK3 should the PC’s parallel port not be able to

source enough current for the module's opto-couplers.

Figure 3 also shows the default jumper settings. The

PM9904BPD evaluation module is setup by default for 3x

230V/80A operation. For 3x 115V operation jumpers J1, J2

and J3 need to be closed. Also capacitors C12, C13, and C14

values must be changed to 1uF / 150 VAC.

When these hardware settings have been verified the user has

the choice of using the micro-controller board or a PC to

evaluate the SA9904B further. Please note when using the PC

the micro-controller board should be unplugged to prevent a

bus contention on the SPI bus, since the PC and micro-

controller would be attempting to drive the bus simultaneously.

Micro-controller board

Once the board has been plugged into the evaluation module

no further action is required, just apply power.

PC

After removing the micro-controller board the evaluation board

can connected to the PC’s parallel port using a 1 to 1 parallel

cable (not supplied). Once the evaluation board has been

connected to the PC and powered up, the supplied software

can be launched. Refer to the next section for the software

installation and setup details.

N

PH1

PH2

PH3

5V

CT3

CT2

CT1

JP4

Supp Sel

SK1

J3

J2

J1

To PC

Parallel port

http://www.sames.co.za

SK2

J12

PB/F150

JP1

J8

J9

J10

J11

J7

J6

GND

J5

VSS

J4

VDD

Figure 3: PM9904AP setup and connection

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