THREE PHASE POWER/ENERGY METERING MODULE

FOR SPI BUS AND PULSE OUTPUT DEVICES

sames

PM9604/5AP

SA9604/5 APPLICATION NOTE

7205

PDS038-SA9604/5-001

REV.B

18-06-98

1/14

FEATURES

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Module used for both SA9604A and

SA9605A evaluation

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Meets the accuracy requirements for

Class 1 AC Watt hour meters

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Operates over a wide temperature

range

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Uses current transformers for current

sensing

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Protection against ESD

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Unused connection pads allows the

module to be customised

DESCRIPTION

This innovative power/energy module allows evaluation of both the SA9604A and

SA9605A, members of the SAMES three phase metering I.C. family.

It is advised that the relevant data sheet for the device under evaluation be read in

conjunction with this Application Note.

The output of this innovative universal three phase power/energy metering circuit is

ideally suited for energy calculations in applications using a µ-controller (SA9604A and

SA9605A) or mechanical counter (SA9605A).

On the left hand side of the board, next to the 25-way D-type connector, the array of

unused solder pads allow the user to customise the module. This section of the board

may be used to access the opto-coupler isolated output signals. Such components as

counters and LEDs may be added to this area to allow the user evaluation of a design

using the SA9604A or SA9605A.

CARE MUST BE TAKEN WHEN CONNECTING ADDITIONAL COMPONENTS TO

THE BOARD AS DANGEROUS VOLTAGE LEVELS EXIST IN SOME AREAS.

BLOCK DIAGRAM

SA9 6 0 4 / 5 A

- 2.5V

C O NDIT IO N IN G

NEUTRAL

PHASE 1

PHASE 2

PHASE 3

S I GN A L

LINE 2

LINE 3

LINE 1

+ 2.5V

0

O

P

T

O

C

O

U

P

L

E

R

O

P

T

O

C

O

U

P

L

E

R

25-WAY D-TYPE - FEMALE

DIR

(SA 9604A)

SK2

J4

FOUT 1

FOUT 2

FOUT X (SA9605A)

SK3