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Microstepping MForce PowerDrive Manual Revision R040507
Optocoupler Reference
The Microstepping MForce PowerDrive 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 2.4.2: Optocoupler Reference Connection
NOTE: When
connecting the
Optocoupler Supply,
it is recommended
that you do not use MForce
Power Ground as Ground
as this will defeat the optical
isolation.
Constant
Current
Source
Optocoupler
+5 VDC
To Drive Logic
Optocoupler
Reference
Input
(Step Clock,
Direction, Enable)
Microstepping MForce
PowerDrive
Figure 2.4.4: Optocoupler Input Circuit Diagram