345-455 VAC, 47-63 Hz, three phase,
3 wire plus ground, Delta or Wye may be used (4 kW only)
M2
432-528 VAC, 47-63 Hz, three phase,
3 wire plus ground, Delta or Wye may be used
(4 kW only)
M9E
SCPI compatible IEEE-488.2 and
RS 232 interfaces (May not be combined with M51A or M85)
M13
Locking shafts (front panel potentiometers)
M51A
Isolated analog programming (May not be combined with M9C or M85). 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.
M85
12-bit slave interface (May not be combined with M9E or M51A)