178B2377 by Danfoss

The 178B2377 is a decentralized variable-frequency drive manufactured by Danfoss as part of the FCD 300 Micro Drives series. Mounted close to an induction motor, it regulates speed and torque for conveyors, mixers, and other equipment on factory floors. The unit targets processing applications that need washdown tolerance and quick changeovers, allowing shorter cable runs while maintaining precise motion in automated production sequences. Its compact molded enclosure carries all power components directly at the point of use, allowing cabinet space to be reserved for higher-level controls.

The drive accepts a three-phase supply of 3x380-480 V, allowing direct connection to common industrial mains. Its continuous power rating is 0.75 kW, which corresponds to an output of 1.0 HP for small pumps and augers. Speed and diagnostic data are exchanged with a controller over Profibus DP V0/V1 12 Mbaud, so parameter changes reach the inverter in real time. An internal EMC network, delivered with an integral 1 A filter, reduces conducted radio-frequency noise so the installation meets typical plant emission limits. A standard factory coating shields the electronics from ambient humidity encountered during continuous production shifts.

The housing carries an IP66 rating, blocking dust ingress and resisting high-pressure cleaning. The control board is Extended (24 V ext.), so external 24 V power can keep fieldbus communication active during mains isolation. Parameter viewing is handled remotely because of the lack of a display, reducing crevices that could trap contaminants. Cables enter through a wall-mount box with metric threads, keeping strain relief and grounding consistent with European machine panels. This arrangement keeps the micro drive sealed, powered, and serviceable when it is mounted directly on processing machinery.