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2-17
Part 2: Interfacing and Configuring
NOTE: When
connecting the
Optocoupler Supply,
it is recommended
that you do not use MDrive
DC Power Ground as Ground
as this will defeat the optical
isolation.
Ground the Opto supply at
the controller I/O ground.
Optocoupler Reference
The MDrivePlus Microstepping Logic Inputs are optically isolated to prevent electrical noise being coupled into
the inputs and causing erratic operation.
There are two ways that the Optocoupler Reference will be connected depending whether the Inputs are to be
configured as sinking or sourcing.
Optocoupler Reference
Input Type Optocoupler Reference Connection
Sinking +5 to +24 VDC
Sourcing Controller Ground
Table 2.3.2: Optocoupler Reference Connection