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
