178B3026 by Danfoss

Danfoss produces the 178B3026 as part of its VLT 2800 Low Voltage Drives series. This AC drive modulates motor speed in process-oriented machinery, letting control systems match pump, fan, or conveyor speed to real-time load conditions and reduce energy consumption. By integrating power electronics, signal processing, and a built-in brake circuit, the unit delivers torque regulation without external mechanical throttling.

The drive connects to mains supplies rated at 200-240 V AC, so it fits low-voltage panels commonly used in light industrial plants. Its input configuration is single-phase, so only line and neutral conductors are required, which simplifies use in facilities that do not have three-phase service available at the installation point. Communication with PLCs is available through a Profibus DP 12 MBaud option card, allowing cyclic data exchange and remote parameter adjustments. Operators can access setpoints or alarms on the built-in display (SLCP), and the display is recessed in the front fascia to maintain a flat profile. Internally, the hardware is classified as standard with brake, indicating that the integrated brake chopper dissipates regenerative energy and helps reduce overvoltage trips during rapid deceleration.

The housing carries an IP20 rating, guarding against finger contact with live parts while remaining open to cabinet airflow. Its slim book-style shape allows several drives to be arranged side by side on DIN rail without requiring wide enclosures. Radio-frequency emissions are suppressed by an integral filter that meets EN 55011 Class A1 limits, so additional line filters are usually unnecessary in industrial zones. The control boards are supplied without a protective coating, which suits clean, dry electrical rooms rather than high-humidity washdown areas. No dedicated application option is installed, so the drive can be configured through the standard parameter menus for pump or fan duties.