Quote Originally Posted by JAZZCNC View Post
It's not about the cost it's the fact it uses 5V and all the instabilty that comes with it.! Anyone who's had noise issues will know all too well why 5V I/O is best avoided for stable system.
Fine but it is normal to use 5V for logic internally. All digital chips run on 5V and/or 3.3V. Nobody is saying that that's what it must use on the inputs and you must directly connect switches and everything, connect a BOB with 24V inputs and than you are just fine.