Product Description:

The RD52.1-4B-030-L-NN-NN-NN-FW is a drive controller manufactured by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. Intended for three-phase industrial networks, it governs induction or synchronous motors by varying output frequency and voltage so that commanded speed or torque is achieved during normal machine operation. The unit integrates power electronics, control logic, and protective hardware in one housing, which supports cabinet installation in automated production lines, process equipment, and other industrial systems.

The controller supplies a continuous output of 30 kW, which suits mid-capacity pumps, extruders, and material-handling axes. It accepts mains between 380 to 480 V and tolerates line deviations of ±10 %, helping it remain stable when the plant supply fluctuates. Motor regulation is handled with field-oriented vector control, which keeps flux and torque components separate for accurate dynamic response at changing loads and speeds. Internally, the converter rectifies the three-phase input and then reconstructs a variable-frequency waveform so the motor can accelerate, decelerate, and hold commanded speed in a controlled manner without abrupt torque changes. No factory-installed special functions are included.

Input energy reaches the DC link through a 3 x AC converter topology, and surplus regenerative power is dissipated by the built-in brake chopper, which can reduce the need for external braking hardware in many applications. Component heat is removed by forced air cooling, with directed airflow helping the semiconductors remain within permissible operating limits during extended full-load duty. To suppress conducted electromagnetic noise, an integrated mains filter attenuates high-frequency currents before they return to the supply and affect nearby equipment. The hardware belongs to Generation 1 of the RD52 platform.