Product Description:

The RD52.1-4B-045-L-NN-NN-NN-FW is a drive controller manufactured by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It provides the closed-loop interface between a three-phase mains supply and the motor circuits used in automated machinery, enabling precise torque and speed regulation in production lines, test stands, and material-handling axes. As a drive controller, it combines power conversion, current sensing, and digital regulation so that higher-level PLCs can issue motion commands without additional power electronics.

The unit uses a three-phase AC converter supply and accepts line voltages from 380 to 480 V, which covers common industrial distribution levels. A continuous output capability of 45 kW allows it to operate medium-power induction or synchronous motors used in extruders, centrifuges, and process pumps. Speed and torque are processed through field-oriented vector control, so the stator currents are separated into orthogonal components for accurate dynamic response. During deceleration, a built-in brake chopper directs regenerative energy on the DC bus to an external resistor to prevent overvoltage trips. The drive does not include application-specific macros, so its control setup can be matched to the machine requirements.

Thermal management relies on forced-air cooling, with internal fans moving air across the heat sink so the module can be mounted in dense cabinets without liquid cooling loops. An integrated mains filter reduces conducted emissions and can remove the need for a separate line filter in many installations. Component tolerances remain within ±10% of the stated ratings, which supports stable operation during normal line-voltage variation. The unit is Design generation 1, indicating the first design generation in this product line.