I am looking at adding a removable back-plate to the case, and if I do then I could offer a variety of different connectors. RJ45 could work for some applications (low voltage/current), are you thinking that they would be mounted to the back plate with pigtails inside the case to be attached to various pins or a shield?
This is the idea we are looking at where we might be switching a wide range of voltages/currents with some relays.
Graynomad:
I would say allow for an RJ45 connector (or 2) at the back, that means all manner of sensors and networks can enter with no externally visible wiring.
Rob