PM9102AP
SINGLE PHASE POWER/ENERGY METERING MODULE
PULSE OUTPUT
FEATURES
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sames
SA9102 / SA9602 APPLICATION NOTE
Performs both power and energy
measurement
Meets the accuracy requirements for
Class 1 AC Watt hour meters
Protected against ESD
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Total power consumption rating below
500mW (excluding current sensing)
Uses a shunt resistor for current sensing
Operates over a wide temperature range
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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
IN
OUT
SHUNT
SA9102
SA9602
OCTO
COUPLER POWER OUTPUT
POWER
METER
DR-01447
NEUTRAL
NEUTRAL
NEUTRAL
LIVE
POWER
SUPPLY
VOLTAGE SENSE
1/10
4308
PDS038-SA9102-001
REV.C
06-08-98
SAMES [ SAMES ]
