178B5801 by Danfoss

The 178B5801 decentralized AC drive is produced by Danfoss and belongs to the FCD 300 Micro Drives series. Designed for installation close to the motor, the unit converts fixed mains power into variable-frequency output so motor speed can track changing load demands during operation. That arrangement is useful on conveyor sections, filling stations, and compact process skids where the drive must sit close to the driven load. Mounting the drive on or near the machine also reduces long motor cable runs, supports distributed control layouts, and helps keep central cabinet space free for other automation hardware.

The enclosure is rated IP66, which lets the drive operate in dusty areas and resist strong water spray in wash-down environments. It delivers a continuous output of 3.3 kW, which is equivalent to 5.0 HP and suits mid-size conveyors, mixers, and similar equipment. This power range provides enough capacity for steady-duty operation without requiring a much larger drive frame. Incoming power is taken directly from 3 x 380-480 V three-phase mains, so the unit can be connected to common industrial supplies without an added step-down transformer. Electrical noise is reduced by an integral 1 A filter, which helps the drive share plant power lines with other electronic devices.

This model is intended for processing applications where compact local mounting and straightforward operation are useful. It is supplied without a display, so parameter access is handled through remote software or an optional keypad rather than a built-in screen. The control section operates without a fieldbus, relying on hard-wired inputs and outputs for start, stop, and speed reference signals in straightforward standalone systems. The unit also comes without a terminal box, and its pre-molded plugs help maintain the housing seal while keeping cable entry compact.