Product Description:

The RD52.1-4N-030-L-NN-FW is a drive controller manufactured by Bosch Rexroth Indramat and delivered within the RD 500 Drive Controllers series. As a converter-based unit, it interfaces between a three-phase mains supply and an induction or synchronous motor, regulating torque and speed for automated machinery. In integrated production lines, the controller coordinates motor behavior through vector algorithms to keep motion consistent with command profiles. It is commonly used where repeatable motor speed and controlled torque are required across changing production cycles.

This model accepts a line voltage between 380 to 480 V through a three-phase AC converter supply topology, so it can be connected to standard industrial power buses without a separate transformer. Input fluctuation is handled within a permissible window of ±10 %, which helps the unit remain in service during brief supply variation. The control core uses field-oriented vector control, allowing separate management of magnetic flux and torque for smooth low-speed operation and quick response to changing load demand. Thermal management is handled by forced-air cooling, and an internal fan moves air across the heat sinks to control semiconductor temperature during continuous duty.

The unit delivers a continuous mechanical output corresponding to 30 kW, which suits mid-size pumps, extruders, conveyors, and similar process equipment. To reduce conducted emissions, the input stage includes an integrated mains filter, which removes the need for a separate filter assembly in many cabinet layouts. Because it is supplied without a built-in brake chopper, braking energy must be handled by external hardware when the application includes frequent deceleration or overhauling loads. The functions field is not equipped, so the controller follows a straightforward base configuration for standard drive tasks. This version belongs to design generation 1 in the RD 500 platform.