Does anyone know what the wiring scheme with resistors is to convert a 4-20 ma signal to a 135 ohm slide wire control to control a 135 Ohm actuator. I know a converter can be bought but I would like to avoid that and simply wire with the needed resistors. Does anyone have this wiring schematic already done. I know someone has done it but it is not sold by the manufacters because it is a cheap solution. A few dollars in resistors.