Inverter (L-F) - single-phase powered (230 V / 50, 60 Hz) with three-phase output (3x230 V, 0.1-400 Hz) frequency converters for surface mounting or in a cabinet. Built-in potentiometer for frequency adjustment and class A RFI suppression filter. More important functions include sensorless vector and U / f control, motor auto-tuning, built-in PID controller, 5 freely programmable inputs, two freely programmable digital outputs and a 0-10V analog output