FEATURES

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Designed to be used as fully functional Watt-Hour meter.

Better than Class 1 operation

On-board power supply

3 Phase 4 Wire configuration

On-board current transformers

Measured energy pulse output LED

Individual phase direction indication

Individual phase fail and error condition indication

sames

Evaluation Board for the SA2005M and SA2005P

Energy Metering IC’s

PM2005M/P

1/12

SA2005M specific:

SA2005P specific:

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Selectable dividing ratios for different rated conditions

Selectable calibration LED resolution and assuming

mode

Calibration and setup data stored on an external

EEPROM

Flexible programmable features

DESCRIPTION

The SA2005M IC is a single-chip solution with pin

programmable features. The SA2005P IC is also a single-chip

solution and retrieves its configuration and calibration

information from an external EEPROM. More detailed

information specific to the SA2005M or SA2005P can be found

in the applicable Datasheets.

The PM2005M/P evaluation board has been designed to be a

fully functional watt-hour meter for three-phase four-wire

applications using either the SA2005M or SA2005P. The mains

voltages easily connect to the module by way of a Molex

connector (SK1). The 3 on-board current transformers

measure the current in each phase. A simple capacitive power

supply supplies the energy metering IC with power. The LM431

regulators are used to generate 5V supply voltage for the IC on

the board.

Figure 1: Block diagram

SPEC-0506 (REV.3)

03-10-02

SK1

Power

Supply

SA2005M

SA2005P

Resistor

Network

VDD

GND

VSS

CT1

CT2

CT3

GND

Resistor

Network

Resistor

Network

VDD

LED

Stepper motor

0 0 0 0 0 0

MOP

MON

7

8

9

Module Setup

Jumpers / EEPROM

VDD

VSS

LED

PH/DIR

PH1

PH2

PH3

DIR1

VFAIL1

DIR2

VFAIL2

DIR3

VFAIL3