SINGLE PHASE POWER/ENERGY METERING MODULE

PULSE OUTPUT

sames

PM9102AP

SA9102 / SA9602 APPLICATION NOTE

4308

PDS038-SA9102-001

REV.C

06-08-98

1/10

FEATURES

n

Performs both power and energy

measurement

n

Meets the accuracy requirements for

Class 1 AC Watt hour meters

n

Protected against ESD

n

Total power consumption rating below

500mW (excluding current sensing)

n

Uses a shunt resistor for current sensing

n

Operates over a wide temperature range

DESCRIPTION

The SAMES single phase power/energy metering module, the PM9102AP, provides two

pulse rate output options, the frequency of which are proportional to the active power

consumption.

Energy consumption is determined by the power measurement being integrated over

time.

The method of calculation takes the power factor into account.

The output of this innovative universal power/energy metering circuit is ideally suited for

energy calculations in applications using a µ-controller or mechanical counter.

The application utilises the SAMES SA9102CP, SA9102FP, SA9102HP, SA9602EP

(DIP-20), SA9602HP (DIP-20) or SA9602MP power metering integrated circuits for

power 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.

BLOCK DIAGRAM

SA9102

SA9602

POWER

METER

OCTO

COUPLER

SHUNT

POWER

SUPPLY

IN

OUT

NEUTRAL

NEUTRAL

NEUTRAL

LIVE

VOLTAGE SENSE

POWER OUTPUT

DR-01447