178B1585 by Danfoss

The 178B1585 is a variable frequency drive manufactured by Danfoss and released under the VLT 2800 Low Voltage Drives series. It is intended for process-oriented automation and adjusts the speed of AC induction motors so that flow, pressure, or feed rates follow a commanded setpoint. Installed in a control panel, the drive helps reduce energy use and mechanical wear by matching delivered torque to real-time demand in continuous-duty equipment. It can improve control stability in systems that would otherwise rely on throttling valves or mechanical speed changes.

Its electrical section is rated for up to 7.5 kW of output, equivalent to 10 HP, which places the model in a mid-range power class for common process machinery. The power terminals accept a 380-480 V ±10% 50/60 Hz three-phase supply, allowing direct connection to standard industrial feeders. A book-style housing minimizes cabinet width, and the hardware configuration includes an internal brake relay to dissipate regenerated energy during fast deceleration. This layout is useful in panels where side-by-side spacing is limited and braking events occur during rapid slowdowns. No application option card is installed, and the control board is supplied without coating for clean, temperature-controlled enclosures.

Network integration is achieved through a Profibus DP 12 MBaud port that exchanges setpoints and status data with PLCs during normal operation. Operating data appear on the built-in display (SLCP), so an external keypad is not required for local viewing and basic setup. Conducted emissions comply with EN 55011 Class A1 through an internal RFI filter, and the enclosure has an IP20 rating for cabinet-mounted installation. The communication link also supports centralized monitoring of drive status within a larger automation system. The process-oriented configuration suits applications such as pumps and fans, where stable speed adjustment is required over long operating periods.