Frequency inverter in Comfort version without sine filter for controlling the speed of a single fan. It includes a display and three operating buttons for setting the fan and control parameters. Parameterization and control options are available via Modbus. The device features an 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) or via direct input on the display. The maximum cable length between FU-C and fan is 10 m with shielded cable. The fan must be designed for operation with a frequency inverter (EMC-compliant fan/motor, possibly special version). For FU-C operation (without sine filter), the frequency converter suitability must be specified when ordering the fan.