PM9603APA Datasheet, PDF (4/18 Pages) Sames – SINGLE PHASE POWER/ENERGY METERING MODULE SPI INTERFACE

PM9603AP
FUNCTIONAL DESCRIPTION
1. Power Calculation
In the Application Circuit (see Figure 2), the output current from the current sensor
will be between 0 and 16µA_RMS (0 to 80A through a shunt resistor of 625µΩ). The
current input stage of the module, saturates at input currents greater than 18µA_RMS.
The mains voltage (Voltage + 15% - 20%) is used to supply the circuitry with power.
A SA9603B utilize current information from the current sensor (shunt resistor),
together with the mains voltage to perform the power calculation.
The SA9603B integrated circuits may be adjusted to accommodate any voltage or
current values. The method for calculating external component values is described
in paragraph 6 (Circuit Description).
SAMES offers two evaluation module options, namely 230V/80A and 115V/80A.
The on chip registers are accessed via the isolated SPI bus.
2. Electrostatic Discharge (ESD) Protection
The device's inputs/outputs are protected against ESD according to the Mil-Std
883C, method 3015. The modules resistance to transients will be dependant upon
the protection components used.
3. Power Consumption
The overall power consumption rating for this power metering application (Figure 2),
is under 500mW, excluding the current sensor, when the supply is taken directly from
the mains.
4. Isolation
The reference of the module is connected to neutral.
5. Isolated Input/Output Interface
The isolated interface is provided to allow the user to access the registers of the
SA9603B.
A 25-Way D type connector (female) is provided on the PM9603AP module. The
connector SK1 connects via a one to one connected cable to a Personal Computer
parallel port.
6. Circuit Description
In the Application Circuits, (Figures 1), the components required for power metering
applications are shown.
In Figure 1, a shunt resistor is used for current sensing. In this application, the
circuitry requires a +2.5V, 0V, -2.5V DC supply.
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