Lately I have been designing some industrialized products (Industrial Arduino / RP IO boards) for use in automation environments. I have worked in the automation field briefly when I was younger and all of our control voltages were 120VAC. I see a lot of people using 24VDC now and only a few clients ask for 120VAC compatibility.
Without this sounding like an opinion:
Is the automation and controls industry moving away from 120VAC for the safer and more world friendly 24VDC? Or should I be thorough and continue to support both 120VAC and 24VDC?