THREE PHASE POWER/ENERGY METERING MODULE
FOR SPI BUS AND PULSE OUTPUT DEVICES
sames
PM9604/5AP
SA9604/5 APPLICATION NOTE
7205
PDS038-SA9604/5-001
REV.B
18-06-98
1/14
FEATURES
s
Module used for both SA9604A and
SA9605A evaluation
s
Meets the accuracy requirements for
Class 1 AC Watt hour meters
s
Operates over a wide temperature
range
s
Uses current transformers for current
sensing
s
Protection against ESD
s
Unused connection pads allows the
module to be customised
DESCRIPTION
This innovative power/energy module allows evaluation of both the SA9604A and
SA9605A, members of the SAMES three phase metering I.C. family.
It is advised that the relevant data sheet for the device under evaluation be read in
conjunction with this Application Note.
The output of this innovative universal three phase power/energy metering circuit is
ideally suited for energy calculations in applications using a µ-controller (SA9604A and
SA9605A) or mechanical counter (SA9605A).
On the left hand side of the board, next to the 25-way D-type connector, the array of
unused solder pads allow the user to customise the module. This section of the board
may be used to access the opto-coupler isolated output signals. Such components as
counters and LEDs may be added to this area to allow the user evaluation of a design
using the SA9604A or SA9605A.
CARE MUST BE TAKEN WHEN CONNECTING ADDITIONAL COMPONENTS TO
THE BOARD AS DANGEROUS VOLTAGE LEVELS EXIST IN SOME AREAS.
BLOCK DIAGRAM
S A 9 6 0 4 / 5 A
- 2.5V
C O N D IT IO N IN G
NEUTRAL
PHASE 1
PHASE 2
PHASE 3
S I GN A L
LINE 2
LINE 3
LINE 1
+ 2.5V
0
O
P
T
O
C
O
U
P
L
E
R
O
P
T
O
C
O
U
P
L
E
R
25-WAY D-TYPE - FEMALE
DIR
(SA 9604A)
SK2
J4
FOUT 1
FOUT 2
FOUT X (SA9605A)
SK3
PM9604/5AP
2/14
sames
Supply Voltage (Note 1)
V
AC
540
V
Storage Temperature
T
STG
-25
+125
°C
Operating Temperature (Note2)
T
O
-10
+70
°C
Note 1:
Voltages are specified with reference to Neutral.
Note 2:
The SA9604A and SA9605A integrated circuits are 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.
ELECTRICAL CHARACTERISTICS
(Over the temperature range -10°C to +70°C, unless otherwise specified. Power consumption
figures are applicable to the PM9604/5APE only.)
Parameter
Symbol
Min
Typ
Max
Unit
Condition
Supply voltage (3 phase) V
AC
180
230
265
V
PM9604/5APE
(Continuous)
90
115
138
V
PM9604/5APA
Output
Refer to applicable IC data sheet
Power consumption
1
2.4
W
V
DD
= 5V
Note 1: Power consumption specifications exclude power consumed by the current
sensor.
ABSOLUTE MAXIMUM RATINGS*
Parameter
Symbol
Min
Max
Unit
PM9604/5AP
sames
3/14
CONNECTION DESCRIPTION
Designation
Description
MAINS
Voltage supply connection to Phase 1
Voltage supply connection to Phase 2
Voltage supply connection to Phase 3
Voltage supply connection to Neutral Live (common)
SK2
P1 Supply (+ve) to opto-couplers
25-Way female
P7 Input SA9604A - SCK
(D-type)
P8 Input SA9604A - DI
P9 Input SA9604A - CS
P12 Output SA9604A - DO
P18, 20 - 25 Common emitters and cathodes of opto-couplers
SK3
1. Supply (+ve) to opto-couplers
4-Way male
2. Output SA9605A - FOUT1 / FOUT2 (selectable)
3. Output SA9605A - DIR
4. Common emitters and cathodes of opto-couplers
SELECTION PINS
Jumper
Description
JP1
CT1 selection
JP2
CT2 selection
JP3
CT3 selection
JP4
SA9604A - SCK signal connection
SA9605A - FOUT1 on FOUT2 selection
JP5
SA9604A - DI signal connection
SA9605A - PGM1 level selection
JP6
SA9604A - CS signal connection
SA9605A - PGM0 level selection
JP7
Resistor selection for on-chip bias and reference current
PM9604/5AP
4/14
sames
FUNCTIONAL DESCRIPTION
1.
Power Calculation
In the Application Circuit (Figure 2), the output current from the current sensor will be
between 0 and 16µA
RMS
. The current input stage saturates at input currents greater
than18µA
RMS
. The mains voltage (mains voltage + 15% -20%) is used for the power
calculation, together with the current information from the current sensor (current
transformers).
For rated conditions, the signals into the current and voltage sensor inputs are set
as follows:
Current sensor input currents:
16µA
RMS
Voltage sensor input currents: 14µA
RMS
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 2.4W, excluding the current sensors.
4.
Isolation
The reference for the unit is connected to neutral.
5.
Isolated Input/Output Interface
The isolated interface is provided to allow the user to access the registers of the
SA9604A and the output signals of the SA9605A.
Two connector types are available on the PM9604/5AP module to access the
outputs of the two devices:
SK2 - a 25-way D-type connector (female) for the SA9604A
SK3 - a 4-pin connector for the SA9605A.
Only one of the output interfaces must be used at any one time to avoid conflict of
signal levels on the opto-couplers.
PM9604/5AP
sames
5/14
6.
Jumper Configurations
The jumper configufations required for the two devices types are shown below:
JUMPER POSITION
SA9604A
SA9605A
NOTES
JP1
1 - 2
Insert
Insert
JP2
1 - 2
Insert
Insert
Note 1
JP3
1 - 2
Insert
Insert
JP4
1 - 2
Remove
Insert (FOUT1)
2 - 3
Remove
Insert (FOUT2)
Note 2
3 - 4
Insert (SCK)
Remove
JP5
1 - 2
Remove
Insert (PGM1=1)
Note 3
2 - 3
Insert (CS)
Remove (PGM1=0)
JP6
1 - 2
Remove
Insert (PGM0=1)
Note 3
2 - 3
Insert (DI)
Remove (PGM0=0)
JP7
1 - 2
Remove
Insert
Note 1:
The removal of the link on the current sensor input must only be
performed during calibration.
Note 2:
Only one of the two output pulse signals on the SA9605A may be
selected at any one time using this module. In a users application both
of these signals may be used.
Note 3:
The SA9605A I.C. has on-board pull-down resistors, pull-up connection
to VDD is, therefore, the only connection which must be catered for.
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