I'm looking to find a way to operate a small servo using a 4-20ma linear analog signal generated by a PLC in an industrial setting.
The purpose of this is to allow for automation for a task that currently is done by manually turning and adjusting a potentiometer with removable dial. Basically, I'm trying to ghetto together an oldschool Motor Operated Potentiometer (MOP) so it can be removed quickly and easily without affecting the operation of the original process.
I've spent hours looking for servo controllers/encoders that are capable of this, but I haven't been able to find any. Any way I could get pointed in the right direction would be fantastic. Surely such a thing must exist! Thanks so much!