I have an application where I need to have communication between two Triangle PLC'S I need this to be very robust and the data rates will be low. The enviroment is outdoors or in a light industrial area. Possibly some RF around from devices in the facility. A couple of stepper drivers are also in this system.
I would like to use the Ethernet using non-shielded CAT5 or CAT6 cable so I could easily interface to PC'S The RS-485 looks to be very robust but not my first choice.
Based on many application of your products in many situations, which is a good choice?