Sorensen DHP40-330

M1	360-440 VAC, 47-63 Hz, three phase, 3-wire plus ground, Delta or Wye may be used
M10	Both IEEE-488.2 and RS-232
M11	RS-232 and isolated analog programming
M12	IEEE-488.2 and isolated analog programming
M14	IEEE-488.2, RS-232 and isolated analog programming
M2	432-528 VAC, 47-63 Hz, three phase, 3-wire plus ground, Delta or Wye may be used
M51	Isolated analog programming Input Voltage Options. This isolation allows users to control power supplies not connected to a common ground. In addition, in systems with high ambient noise or with large ground loop currents the control ground can be isolated from the power ground eliminating problems.
M8	Internal RS-232 remote serial interface
M9D	Internal IEEE-488.2 interface