Product Description:

The RD52.1-4B-160-F-NN-NN-NN-FW is a drive controller built by Bosch Rexroth Indramat for integration into the RD 500 Drive Controllers series. Positioned between a three-phase supply and an AC motor, it adjusts output voltage and frequency so higher-level controls can manage motor speed and torque with stable response. This makes it suitable for conveyors, pumps, mixers, and other industrial axes that need repeatable motion under changing load conditions. Protective regulation within the drive also helps reduce sudden stress on connected mechanical components during starts, stops, and process transitions.

This controller uses field-oriented vector control, which separates flux and torque control for improved response during acceleration and load changes. Its power section is rated for 160 kW, giving it the capacity to operate large motors in continuous-duty applications where steady output is important. A line range of 380 to 480 V supports common industrial power systems found in production facilities. The unit uses a three-phase AC converter topology, so it accepts standard three-phase input without a separate external rectifier stage. Regenerative energy produced during deceleration is handled by a built-in brake chopper, which helps prevent DC-bus overvoltage during braking events.

Thermal management relies on forced-air cooling with integrated liquid circulation, combining cabinet airflow with a liquid path that removes heat from high-loss components during sustained operation. The controller tolerates line variation of ±10 %, which helps it remain operational through brief supply changes without unnecessary interruption. An integrated mains filter reduces conducted emissions on the supply connection, and the unit is identified as design generation 1. Optional application functions are not included, so the controller remains focused on standard speed and torque control.