Product Description:

The FC-051PK75S2E20H3 is a compact AC variable-frequency drive manufactured by Danfoss and delivered under the VLT FC 51 Micro Drives series. This chassis-mount unit converts fixed-frequency mains power into a modulated output that controls the speed and torque of fractional-kilowatt induction motors. It allows connected motors to accelerate, decelerate, or maintain a constant speed in response to PLC signals, making it suitable for light-duty pumps, fans, conveyors, and material-handling equipment. Its compact format also helps conserve space in control panels used for small machines and automation cells.

The inverter has a rated motor output of 0.75 kW, which corresponds to 1.0 HP for applications using imperial units. Its input section accepts 200–240 VAC, allowing direct connection to compatible low-voltage plant supplies without an autotransformer. The drive is designed for single-phase power, which simplifies branch-circuit wiring in small control panels. Electrical and thermal protection at the motor terminals helps safeguard the drive and connected motor against operating faults. The enclosure has an IP20 chassis rating and is intended for installation inside a ventilated cabinet where protection from accidental finger contact is required. Because the chassis does not provide liquid-splash protection, the surrounding cabinet must provide suitable protection for the installation environment.

Electromagnetic compatibility is supported by an integrated RFI Class A1/B filter that attenuates conducted emissions on the line and motor sides of the converter. The internal control platform uses code 051, and its common parameter structure supports consistent drive configuration across compatible models in the product line. The unit follows the VLT Micro Drive format for its dimensions, keypad arrangement, and available communication options. Danfoss flux-vector control helps the FC-51 maintain stable motor torque at low speeds while responding accurately to changing load demands. Energy-saving sleep functions can stop the motor when process demand falls below a configured level and restart it when operation is required. PLC control signals can adjust speed references and operating commands without requiring extensive external control hardware.