Product Description:

The FC-051PK37S2E20H3XXCXXXSXXX is a compact AC variable frequency drive manufactured by Danfoss as part of the VLT FC 51 Micro Drives series. Within the VLT Micro Drive product group, the FC 51 line converts single-phase AC line power into a modulated three-phase output so plant controllers can adjust the speed of fractional-horsepower induction motors. By varying frequency and voltage, it supports process control on conveyors, small pumps, and ventilation fans while occupying minimal panel space. This operating method lets a standard induction motor run at the speed required by the application instead of at fixed line frequency.

In operation, the drive delivers 0.37 kW of continuous motor power and is matched electrically to a 200–240 VAC input range. It is wired to a single-phase supply, allowing installation on common branch circuits without a transformer. The chassis has an IP20 protection level, so the electronics require cabinet mounting for finger safety and reduced dust exposure. A built-in filter meets RFI Class A1/B emission limits, which helps reduce conducted noise on the input line. Because the brake chopper is omitted, regenerative energy during deceleration must be handled by the motor or an external module. The drive also has coated circuit boards for added durability, and Adaptation B uses no installed option cards.

The mechanical output is 0.50 HP, which suits light conveyors and auxiliary pumps. Field wiring enters through Standard Cable Entries, which simplify cable routing and strain relief on gland plates. A coated PCB helps protect traces from moisture and chemical exposure inside the cabinet. The drive uses latest release std. SW. as its standard software package. No local control panel is fitted, so command entry and line isolation must be provided by external components. External controls are therefore used for speed commands and status access.