Then I still have to move the 50 inputs in an easy way from one board to another. What kind of hardware is used for that ?
50-way ribbon cable.
But when you swap all the controlled devices in the house will turn off (or on depending on the wiring).
Would you say this is redundant enough ?
Well you're thinking along the right track in some ways, but what about my example of the push button light switch, how do you operate a light (or any other device) if the system is broken?
Rob