Product pictures Product Overview: Emerson UNI2403 Parameter Specification Manufacturer Emerson Order Number UNI2403 Product Name Mid-range AC drive / variable frequency inverter Series / Family Unidrive (neighbouring codes include UNI1405, UNI2402, UNI2403, UNI3401) Application & Fault Scenarios uitable for 400 V three-phase motors on crushers, hoists, conveyors, packaging lines, textile machines, machine tools and test rigs needing adjustable speed and torque control.