Product Description:

The RD52.1-4B-001-P-NN-FW drive controller is produced by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. Designed for cabinet-mounted motor control, the unit converts three-phase mains power into regulated output for induction or synchronous motors used in conveyors, presses, and other automated stations. By regulating torque and speed through real-time current processing, it serves as the central actuator interface between a PLC motion command and the mechanical load. This layout supports accurate motor response when operating conditions change during normal machine cycles. It is suited to applications that need coordinated speed changes, steady torque delivery, and predictable response during start, run, and stop events.

The controller handles line voltages from 380 to 480 V and tolerates supply variation up to ±10%, so standard industrial feeders can be connected without a transformer. It is energized through a three-phase AC converter front end that rectifies and inverts the mains to a variable-frequency output. An integrated mains filter attenuates conducted emissions, reducing the need for external filtering hardware. For dynamic regulation, the drive uses field-oriented vector control, which separates motor flux and torque for stable low-speed operation and consistent load handling. It also improves torque response during acceleration from low shaft speeds. A heat-dissipating back panel removes losses for power ratings up to 18.5 kW, helping the enclosure shed heat without additional internal complexity.

Mechanical braking energy is redirected inside the unit by the built-in brake chopper, allowing fast deceleration without an external resistor on light-duty axes. Thermal management is augmented by the heat dissipation panel, which simplifies enclosure ventilation calculations and supports stable operation in compact cabinet layouts. The unit is part of Design generation 1, so it matches the first release of the RD52 platform for compatible option-card selection. No optional technology packages are included, so the controller remains focused on core drive functions and leaves expansion choices open for the application.