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.

FEATURES
■ Performs both power and energy measurement
■ Meets the accuracy requirements for Class 1 AC Watt hour meters
■ Protected against ESD
■ Total power consumption rating below 500mW (excluding current sensing)
■ Uses a shunt resistor for current sensing
■ Operates over a wide temperature range
■ Serial interface having a RS232 Protocol