... 420, 430 and 440 series. For 420 series’ technical dataVoltage and power ranges200-240 V, ± 10%, 1 ... /f characteristic), V/f characteristic.Typical usesConveyor systems, material transport, pumps, fans, mechanical engineering.For 430 series’ technical ... (parameterizable V/f characteristic), V/f characteristicTypical usesSpecially suitable for pumps and fans. For 440 series’ technical dataVoltage and ...