One thing to keep in mind with the 4-20 mA signals is you often have to use an external power supply for loop power
Many of the displays and transducers I use, have internal supplies that you can switch in or out with DIP switches.
The 0-10V signals are OK in areas with little or no EMI, but in machines with multiple VFD's or high power loads, I prefer the current loops. The low impedance of the inputs makes it a lot less susceptible to picking up spurious signals. One disadvantage of the current loops, if you want to add another display, you have to open the loop to insert the new display in series. With the voltage signal, it is easier to parallel with any available signal.
Larry C
