Frequency inverter in Comfort version with integrated, all-pole sine filter. For speed control of one or more fans. The permissible number of fans is determined by the maximum frequency inverter current. Includes display and three operating buttons for setting the fan and control parameters. Parameterisation and control option via Modbus. With integrated, fully-fledged control system for temperature, pressure and air speed. The required sensors LDF 500, LGF 10, LT... are available as accessories. The speed is set via the 0-10 V control signal (e.g. potentiometer PU/PA, accessories). Cable length between FU-CS and fan over 10 m possible. No additional EMC shielding of the electrical cables required. The fans including motor do not require any special EMC precautions for frequency inverter operation. When using the frequency inverter with integrated sine filter, conventional standard fans/motors can be used.