Hi,

Would it be reasonable to think that should protect the drive if the voltage is too high for it to handle? I would hate to blow a drive.
The overvoltage alarm is on the DC Link side. 240VAC rectified is 336VDC. I would guess the overvoltage alarm would come on at around 365VDC. This alarm is more about the
DC Link capacitors, and they come under stress when the servo is decelerating rapidly....the servo back-generates into the DC Link, causing a potential over voltage event for the capacitors.
The alarm does not cut the incoming AC supply...so.......no I would not expect an overvoltage alarm to protect the servo drive, at least from an overvoltage input.

Craig