A client has an old Symax 400 plc being used for control of a water pumping station. They complained that spare parts for the analog inputs are very expensive. When I looked at it, I discovered they're using a thermocouple input module (module RIM-126) for the 4-20 mAdc inputs. The local Square D guy tells me that's the most expensive module you can put in that unit. Why in the world would anyone have done this in the first place? Wouldn't the programming have to be custom for that type of input application?