I am trying to control a pump (ismatec ecoline V380) from a microcontroller (xmc4300, infineon) using an analog interface.
The pump takes several inputs, most importantly: the speed (from a current loop, 4-20mA.) But also, using another pin, you can determine the pump direction. According to the instructions of the pump, if this pin is in an "open position", the pump operates clockwise, whereas when conneted to ground, it pumps counter-clockwise.
Now my question is, if there is a possibility to implement this direction control using a digital output pin of my microcontroller?
I tried to toggle the output to high and low, but the pump only pumps in one direction. Therefore, the "high" state is not similar to "open," is it?