The HS-20USB is a 4-axis step motor controller that can operate standalone
or -- via its USB interface -- under the supervision of a host PC. It actually
does a lot more that motion control and in many cases can completely replace
PLC modules. For each of 4 independent channels it can 1) generate step,
direction, and enable outputs for a step motor driver, and 2) process encoder,
direction, and limit inputs. I/O's on channels not needed for step motor con-
trol can be used for other purposes. Standalone control programs for the HS-
20E-USB can be written in an interpreted command language or implemented
as ap-specific firmware. The HS-20USB includes an RS-232 port which can be
used in place of the USB port, and an RS-232 only version is also available.
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