G540 - 4 motor connection problem

[A_Camera]

I have read the manual, the drive IS DESIGNED to be operated at 50Volts, and already has a 10 volt buffer - it works up to 60 Volts.

The manual on page 3 says:

CAUTION!
Power supply voltage in excess of 50 VDC will damage the G540.

I would not try with anything near 60V, and would keep the voltage below 50V, since that is the maximum.