Product Description:

The RD52.1-4N-045-L-NN-FW drive controller is produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It occupies a central role in an inverter panel, converting fixed-frequency mains power into controlled output that matches commanded speed and torque profiles for connected industrial motors. By integrating with distributed I/O and motion sequences, the device supports precise positioning, conveyor speed regulation, and stable process control across automated production lines. Its hardware platform corresponds to design generation 1.

Supply voltage enters through the converter section designed for 380 to 480 V, permitting installation on common factory bus bars without an isolation transformer. Inside, the module operates as a three-phase AC converter, rectifying the incoming supply and re-inverting it under field-oriented vector control so torque follows reference values even at low speed. Continuous mechanical demand up to 45 kW can be delivered, which suits medium-frame pumps, centrifuges, and extruders. Heat produced by the IGBTs is removed with forced air cooling, so the enclosure must have an unobstructed airflow path. Because the optional technology bay is not equipped, the base unit focuses on drive regulation alone.

Input variations are accommodated by a line tolerance of ±10%, keeping the DC-link voltage within acceptable limits during supply dips or surges. An integrated mains filter attenuates conducted noise and can reduce the need for external RFI components in sensitive installations. The housing comes without a built-in brake chopper, so applications with rapid deceleration may require external braking hardware. The operating program is ordered as a separate subposition rather than being stored in the power stage.