I have modernized many OEM elevators including KONE and OTIS. My recommendation to everyone who wants to modernize OEM controllers: either don't do that or Smartrise crap should be your last option. Smartrise is a mistake. That doesn't simply work and is not even safe. Smartrise AC inputs fail all the time, and their brake boards are also unsafe. We are now replacing Smartrise C4 controllers with MCE and EC.