Most, actually all, of the motors I've run across at communities are 120V in. They often have battery back-ups, which have enough juice to open the gates in the event of a power failure. All of the voltage adjustments for the control board, battery back-up, etc. are done within the motor/control housing.
I haven't been called out to personally inspect this installation yet. I imagine the community is uninterested in spending money on something "that works". This is usually the case, especially in this economy.
