TO THE M-MAXThe M-Max series of sensorless vector adjustable frequency drives includes both single- and three-phase devices. The standard drive includes a digital display and operating and programming keys on a keypad. The display provides drive monitoring, as well as adjustment and diagnostic information. The keys are used for digital adjustment and programming of the drive, as well as for operator control. Separate terminal blocks for control and power wiring are provided for customer connections. The M-Max drives feature RS-485/Modbus, proportional-integral (PI) controller and several fieldbus options.