Product Description:

The FC-301 is an AC variable frequency drive produced by Danfoss as part of the VLT FC 301 Automation Drives series. This converter regulates the speed of three-phase induction motors by modulating output frequency and voltage, allowing precise process control and energy savings in conveyors, pumps, and general factory automation. In industrial cabinets, it occupies the control layer between the incoming mains supply and the motor terminals.

The internal control loop completes every 1 ms, so parameter changes from a PLC are reflected in motor torque almost immediately. For high-resolution position counters, the pulse input accepts edge rates up to 110 kHz, allowing the drive to process incremental encoder feedback without skipping counts. Digital command lines are protected, with inputs that tolerate up to 28 V DC and outputs that can source 40 mA to status LEDs or relays. When the drive is configured for frequency following, each digital output can toggle at frequencies up to 32 kHz, making it suitable for high-frequency PWM handshaking with external devices. These fast response times support rapid acceleration and tight speed regulation in automated machinery.

The drive supports an input frequency of 50/60 Hz ±5%, and its displacement power factor remains above 0.98, reducing reactive current drawn from the supply. The unit meets the IE2 efficiency class, so less waste heat is generated during full-speed operation. Installation is permitted up to 1000 m above sea level without derating; above that elevation, the drive applies automatic current limits for operation at elevations up to 3000 m. The drive supports motor cable lengths of up to 75 m for unshielded cable or 50 m for shielded cable. It permits a phase imbalance of up to 3% of the rated voltage. Torque rise time is 1 ms in flux mode and 10 ms with VVC+ control, providing predictable response characteristics when the drive is installed in distributed control panels.