Product Description:

The FC-280PK55T4E21H2BNCXXXSXXXXAX belongs to the VLT FC 280 Midi Drives series manufactured by Danfoss. As a compact variable-frequency drive, it converts fixed-frequency line power into a modulated output that allows automation systems to vary induction motor speed and torque. This capability suits conveyor, pump, and fan applications where adjusting motor speed to the actual load can save energy and reduce mechanical stress on connected equipment.

The drive delivers a nominal output of 0.55 kW, which is equivalent to 0.75 HP and provides suitable power for small and midsize three-phase motors. It accepts a three-phase 380–480 VAC supply, allowing direct connection to standard industrial mains within that voltage range. An integrated RFI stage meets EMC Category C3 (200/400 V) requirements to limit conducted emissions on motor cables. Control logic is handled by a standard control card with Modbus, enabling serial communication with PLCs for setpoint commands, operating status, and fault data. The compact enclosure allows the drive to fit into space-constrained control panels while providing variable-speed control for common industrial equipment.

For dynamic stopping, the internal brake chopper routes regenerative energy to an external resistor, helping prevent DC-bus overvoltage during rapid deceleration. The circuit boards are supplied as coated PCBs, improving their resistance to moisture and airborne contaminants in industrial settings. The unit has no integrated mains options, so any required harmonic mitigation, external fusing, or additional line protection must be installed separately. Because the braking resistor is also external, its resistance and power capacity must be selected to match the motor load and expected stopping cycle.