SAMES PM9110BFA, PM9110BFE Datasheet
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FEATURES
SA9110A APPLICATION NOTE
PM9110BF
MONOCHIP THREE PHASE BIDIRECTIONAL
KILOWATT HOUR METERING MODULE
! Performs bidirectional energy metering
and includes a 7 digit LCD driver with
announciators
! 4 externally selectable on-chip tariff reg-
isters
! An additional total energy register
! Meets the accuracy requirements for
Class 1 AC Watt hour meters
! Optical interface for electronic reading
DESCRIPTION
The SAMES monochip three phase bidirectional kilowatt hour metering module, the
PM9110BF, provides all the required metering functions including energy measurement, a 7 digit LCD driver, a tariff selection facility, an optical port as well as a pulse
output for calibration purposes.
Energy consumption is determined by the power measurement being integrated over
time.
This method of calculation takes the power factor into account.
This application utilises the SAMES SA9110AFA monochip three phase bidirectional
kilowatt hour metering IC for energy measurement.
according to IEC1107 Mode D
! Pulse output for calibration
! Total power consumption rating below
100mW
! Uses current transformers for current
sensing
! Operates over a wide temperature range
! Demonstration software included
PM9110BFX PDS038-SA9110A-001 REV. 2 28-06-00
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PM9110BF
BLOCK DIAGRAM
LOAD
SUPPLY
DISPLAY
DR-01103
SA9110A
BATTERY
BACKUP
5V POWER
SUPPLY
SCROLL RESET
PCLK
PDTA
PGM
EXTERNAL
POWER SUPPLY
TARIF
SELECT
ISOLATED
CALIBRATION
INTERFACE
PULSE
OUTPUT
OPTICAL
PORT
ABSOLUTE MAXIMUM RATINGS*
Parameter Symbol Min Max Unit
Supply Voltage (Note 1) V
Storage Temperature T
Operating Temperature T
AC
STG
O
-25 +125 °C
-10 +70 (Note 2) °C
540 V
Note 1: Voltages are specified with reference to Neutral
Note 2: The SA9110A integrated circuit is specified to operate over the temperature
range -10°C to +70°C. The module functionality will, however, depend upon
the external components used.
*Stresses above those listed under “Absolute Maximum Ratings” may cause permanent
damage to the device. This is a stress rating only. Functional operation of the device
at these or any other conditions above those indicated in the operational sections of this
specification, is not implied. Exposure to Absolute Maximum Ratings for extended
periods may affect device reliability.
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PM9110BF
ELECTRICAL CHARACTERISTICS
(Over the temperature range -10°C to +70°C, unless otherwise specified. Power
consumption figures are applicable to the PM9110BFE only.)
Parameter Symbol Min Typ Max Unit Condition
Supply Voltage (x3 Phase)
(Continuous)
V
AC
180 230 265 V PM9110BFE
Power Consumption 100 m W From external
power supply
Isolation Voltage
Opto-coupler Output
Current
Opto-coupler Input
Current
1
V
IS
I
O
I
I
2500 V Continuous
10 mA VOL = 1V
10 mA
Note 1: Isolation voltage may be specified, depending on customer requirements.
PIN DESCRIPTION
Designation Description
SK1 Isolated programming interface
5-Pin
Header
connector
SK2 Isolated pulse output
2-Pin
Header
connector
MAINS Voltage Supply Connected to Phase 1
Voltage Supply Connected to Phase 2
Voltage Supply Connected to Phase 3
Voltage Supply Connected to Neutral Line (common)
CT1 Phase 1 (Orientation indicated on PCB)
CT2 Phase 2 (Orientation indicated on PCB)
CT3 Phase 3 (Orientation indicated on PCB)
POWER 5V DC Supply Voltage
0V DC Supply Voltage
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PM9110BF
FUNCTIONAL DESCRIPTION
1. Energy Calculation
This Application Note should be read in conjunction with the SA9110A Data Sheet.
In the Application Circuit (see Figure 2), the output current from the current sensors
will be between 0 and 16µA
input currents greater than18µA
. The current input stage of the module saturates at
RMS
. The mains voltage (Voltage + 15% - 20%) is
RMS
used to perform the energy calculation, together with the current information from
the current sensor (current transformers).
The SA9110AFA integrated circuit may be adjusted to accomodate any voltage or
current values. The method for calculating external component values is described
in section 9 (Circuit Description).
The accumulated energy is directly displayed on a 7 digit LCD. This unique
application offers a host of additional features, which are dealt with below.
2. Electrostatic Discharge (ESD) Protection
The device's inputs/outputs are protected against ESD. 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 100mW, excluding the current sensors.
4. Isolation
The programming interface and pulse output are isolated from the module which
is at mains potential, via opto-couplers.
5. Isolated Programming Interface
This isolated interface is provided to allow the user to programme the tariff register
values, calibration constants and manufacturer/meter identification codes. This
port is enabled by inserting the jumpers J8, J9 and J10. The programming may be
performed via the parallel port of a personal computer.
The designation of the pins on connector SK1 are given below:
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PM9110BF PC Parallel Connectors (Suggested)
Pin Description Pin Description
1 GND 18 GND
2PB2D1
3 PCLK 4 D3
4 PDTA 5 D4
5 PGM 3 D2
Note: The recommended connections above are applicable for the demonstration
software provided with the PM9110BF.
6. Optical Port
The optical port has been designed to meet the IEC1107 Mode D specification. This
facillity offers a pulse output as well as a serial data meter reading facility.
Three types of interfacing elements from the PM9110BF are available:
a) Infra-red optical port
b) Red LED
c) Opto-coupler
In order to maximise the intensity of the element, it is suggested that only one of
the outputs be used at any one time.
PM9110BF
Jumper Element
J5 Opto Coupler
J6 Infra Red LED
J7 Red LED
7. Liquid Crystal Display (LCD)
The PM9110BF has a LCD comprising of seven digits with announciatiors.
To cater for compatibility with future devices four jumpers are provided for
backplane driving configurations. The PM9110BF boards are shipped to the
customer with jumpers in a default configuration.
8. Tariff, Scroll and Reset Functions
Tariff Selection
A dual DIP switch provides the user with the facility to set the active tariff register
in which consumption will be accumulated.
The active register is indicated on the LCD.
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