Product Description:

The RD43.1-4R-185-F-NN-FW belongs to the RD 500 Drive Controllers series manufactured by Bosch Rexroth Indramat. As a drive controller, it converts mains power into regulated motor voltage and current for coordinated speed and torque control in automated production cells, conveyors, and machine tools. It forms the interface between the line supply and servo or induction motors, allowing programmable motion commands to be translated into controlled mechanical output. This role makes it suitable for applications that need repeatable acceleration, steady running speed, and controlled deceleration under changing loads.

The controller delivers up to 185 kW of continuous output, supplying enough power for large pumps, extruders, and multi-axis production centers. It accepts line inputs from 380 to 480 V, which fits common factory distribution networks, and it uses a three-phase AC converter topology to generate the motor supply. Input fluctuations of up to ±10% are tolerated without derating, which helps maintain stable operation when the incoming grid is not perfectly steady. The housing has an IP20 protection rating, so the unit is intended for installation inside a closed electrical cabinet and is protected against accidental finger contact with internal live parts. The enclosure is not sealed against water, which makes cabinet mounting important in areas where liquid exposure or heavy contamination may occur.

In high-duty installations, thermal management uses forced-air cooling with integrated liquid circulation, combining airflow across the heat sinks with a liquid loop that removes concentrated losses. This arrangement is suited to high-power installations where both airflow management and coolant routing are available in the cabinet. Because the unit is supplied without a brake chopper, regenerated energy is returned to the supply instead of being dissipated inside the drive. An integrated mains filter suppresses conducted emissions, which reduces the need for external line-filter hardware. The controller is built to Design Generation 1 and is shipped without additional option modules installed.