The ENCISO is a 5 volt quadrature encoder optical
isolator and splitter. It takes a A+/A-/B+/B-
encoder input, and splits it off
into 2 independent A+/A-/B+/B- sets of encoder outputs.
The inputs and each of the outputs can get power from a
different power supply, and they are optically isolated
from each other. This board uses high speed network grade
optical isolators, capable of operating at 5 million encoder
edges / second (1.25 million complete encoder cycles per
second, of which most systems will consider to be 4
It is possible to use 3 different isolated power supplies
as well (one for the physical encoder, and one for each of
the virtual encoders). However, this is not required. It
is ok to make some of the power supplies common. In either
case, all 3 sets of the power supply terminals must be
connected to power. Usualy, a servo drive provides 5 volts
out to power the physical encoder. This same supply may be
connected to the virtual encoder supply terminal.
If you don't use the servo's power supply, you should still
hook the 0v terminal to the servo's 0v to reference the
signals to the same voltage potential.
You can split the encoder signal more than 2 ways by using
multiple splitters. For example, with 4 ENCISO units, you
can split the original encoder signal 8 ways. When using the
unit in this manor, you should remove the termination resistors
on all but the last unit.