sames

sames

sames

sames

sames

FEATURES

!

Performs bidirectional energy meter-

ing and includes a 7 digit LCD driver

with announciators

!

4 externally selectable on-chip tariff

registers

!

An additional total energy register

!

Meets the accuracy requirements for

Class 1 AC Watt hour meters

!

Optical interface for electronic reading

according to IEC1107 Mode D

1/12

!

Pulse output for calibration

!

Total power consumption rating below

600mW

!

Uses a shunt resistor for current sens-

ing

!

Operates over a wide temperature

range

!

Demonstration software included

MONOCHIP SINGLE PHASE BIDIRECTIONAL

KILOWATT HOUR METERING MODULE

PM9109BFX

PDS038-SA9109-001

REV. 3

28-06-00

SA9109B APPLICATION NOTE

PM9109BF

DESCRIPTION

The SAMES monochip single phase bidirectional kilowatt hour metering module, the

PM9109BF, provides all the required metering functions including energy measure-

ment, a 7 digit LCD driver, a tariff selection facility, an optical port as well as a pulse

output for calibration purposes.

Energy consumption is determined by the power measurement being integrated over

time.

This method of calculation takes the power factor into account.

This application utilises the SAMES SA9109BFA monochip single phase bidirectional

kilowatt hour metering IC for energy measurement.

As a safety measure, this application shows the current sensor connected to the neutral

line. In practice the live line may be used for current sensing, provided that the supply

connections (MAINS) are reversed on the module.