SA9602M
The SA9602M allows selection of the form of energy to be measured: forward
energy, reverse energy, or bidirectional energy. Selection is achieved by means of
the DIRI input. A table of possible settings for DIRI is shown below:
DIRECTION SELECTION
Signal Input DIRI
0
1
DIRO
Description
Motor pulses only for
reverse energy
Motor pulses only for
forward energy
Motor pulse for
bidirectional energy
Condition
Default pull up input
DIRO connected to
DIRI
7.
Rated Condition Select
The user selectable output frequencies for the MOTOR output and LED pulse rate
will allow a meter manufacturer to build meters for a 5-4-3-2 scaling ratio of rated
current.
The table below shows the various options which can be selected using pins R0 and
R1.
RATED CONDITION SELECT
MD
1
1
1
1
R1
0
0
1
1
R0
0
1
0
1
Rated Conditions
230V
230V
230V
230V
/
/
/
/
40A
60A
80A
100A
LED Output (1000
pulses/kWh)
2.55Hz
3.83Hz
5.11Hz
6.39Hz
Scaling of the frequency for the MOTOR drive output pulses takes effect in the
same manner as shown for the LED output pulse rate.
This feature is particularly useful in circumstances where a manufacturer requires
a meter for use in a system rated for two different conditions, for exampe 230V/80A
and 230V/40A. Previously such a requirement would have necessitated alteration
of both the input current sensing resistors and the output measuring/counting block.
With the rated condition select, using R0 and R1, the SA9602M allows for the
development of different rated meters requiring minimal changes.
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