Product Description:

The RD52.1-4B-200-F-NN-NN-NN-FW is manufactured by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. This unit regulates induction and synchronous motors in automated machinery, delivering closed-loop speed and torque control for conveyors, extruders, and general motion axes. By using vector-based current processing, the controller translates PLC commands into precise motor currents, making it a central element in high-power production lines. Its role is to maintain stable motor behavior during changing process demands, including acceleration, deceleration, and steady-state operation under varying loads.

Electrical compatibility is broad because the controller accepts a mains window of 380 to 480 V and uses a three-phase AC converter supply topology. Within this range, it can deliver up to 200 kW of mechanical output when paired with a matching drive motor. The input tolerance is rated at ±10 %, allowing operation on utility grids that fluctuate within normal industrial limits. Motion regulation is executed through field-oriented vector control, a method that calculates stator flux in real time to keep torque response stable across the speed range. This control approach supports quick load changes and accurate low-speed operation in continuous-process equipment.

Thermal and braking hardware are incorporated to reduce the need for external components. A built-in brake chopper dissipates regenerative energy directly through an internal resistor, preventing DC-link overvoltage during rapid deceleration. The housing uses forced-air cooling with integrated liquid circulation, combining high airflow with a coolant plate to remove heat from the power modules during sustained operation. Input cleanliness is improved by an integrated mains filter that limits conducted emissions returning to the supply. The unit is classified as generation 1, which places it in the early RD 500 product generation and keeps its platform designation consistent within that series.