Product Description:

The RD52.1-4N-075-D-NN-FW is a drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. Designed for cabinet mounting in industrial automation lines, the unit regulates motor torque and speed through vector-based control so connected machinery can respond smoothly to changing process demands. It converts incoming line power into controlled AC output for conveyors, packaging modules, and process equipment that require stable acceleration and repeatable running speed. Because speed and torque are adjusted electronically, the controller can match motor output to process demand instead of running at a fixed supply frequency. This role places the controller between the plant power supply and the motor, where it supports consistent operation during both steady-state production and changing load conditions.

The drive uses field-oriented vector control, which helps maintain responsive torque behavior even at low motor speeds. Its inverter section is rated for 75 kW, making it suitable for medium-power applications. The acceptable supply range is 380 to 480 V, and the unit connects to a three-phase AC converter input so it can be applied on common industrial power systems. A tolerance of ±10% allows for normal line variation, while an integrated mains filter helps reduce conducted interference on the incoming line. These characteristics support variable-speed operation while keeping power quality demands within a practical industrial range.

For heat removal, the housing uses a plug-through cooler that directs much of the thermal load toward the outside of the enclosure, which helps keep cabinet temperatures under control during sustained operation. Separating heat from the cabinet also helps protect nearby control components from excess thermal buildup. The unit comes without a built-in brake chopper, so regenerative energy from decelerating or overhauling loads must be handled by external equipment when needed. It is classified as design generation 1, and the optional functions bay is empty, indicating a base configuration without added technology modules. This layout suits installations that need the core drive functions of the platform in a straightforward cabinet-mounted package.