Product pictures Product Overview: Emerson UNI4401 Parameter Specification Manufacturer Emerson Order Number UNI2402 Product Name Large-frame AC drive / variable frequency inverter Series / Family Unidrive (neighbouring codes include UNI3405, UNI4402, UNI4403, UNI5401) Application & Fault Scenarios Suitable for 400 V three-phase motors on extruders, centrifuges, hoists, heavy conveyors, mixers, packaging lines and machine tools needing adjustable speed and torque control.