Basic version of frequency converter with integrated, all-pole sine filter. For controlling the speed of one or more fans. The permissible number of fans is determined by the maximum frequency converter current. The speed is set using the 0-10 V control signal (e.g. potentiometer PU/PA, accessory). Cable length between the frequency converter and fan of over 10 m is possible. No additional EMC shielding of the electrical cables is required. The fans including the motor do not require any special EMC precautions for frequency converter operation. The frequency converter is permanently set to its rated current. When using the frequency converter with integrated sine filter, conventional standard fans/motors can be used.