sames

PM9103AP

SA9103 / SA9603C APPLICATION NOTE

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)

SINGLE PHASE POWER/ENERGY METERING MODULE

SERIAL INTERFACE

n

Uses a shunt resistor for current

sensing

n

Operates over a wide temperature

range

n

Serial interface having a RS232

Protocol

DESCRIPTION

The SAMES single phase power/energy metering module, the PM9103AP, provides

energy data via a RS232 compatible serial interface.

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 meter is ideally suited for energy

calculations in applications using a µ-controller.

The application utilises the SAMES SA9103CP, SA9103EP or SA9603CP 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.

4309

PDS038-SA9103-001

REV.C

11-08-98

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