Been working on a little projekt with a Nano-10 acting as a RS485 modbus master and a temperature controller as a slave device. When programming and testing on my desk I have only used two wires for communication but what is the right way to wire it up in the field? I attached a picture describing how I think the wiring should be, but I'm not completely sure. I'm planning to replace the RS485 driver to a LT1785AIN8.