Product Description:

Bosch Rexroth Indramat manufactures the RD52.1-4B-075-D-V1-FW as part of the RD 500 Drive Controllers series. The unit is a drive controller that converts fixed factory mains into adjustable voltage and frequency so that induction or synchronous motors follow programmed speed and torque profiles in automated equipment. By embedding motor-oriented feedback loops inside the power electronics, it forms the core interface between a plant PLC and the mechanical load, directly influencing cycle time, accuracy, and energy use on conveyors, pumps, or machine-tool spindles. This operating role lets the controller support repeatable acceleration, deceleration, and steady running in process and motion applications.

The controller delivers a continuous mechanical output of 75 kW while maintaining vector precision through field-oriented vector control. It accepts power from a three-phase AC converter input and tolerates line conditions from 380 to 480 V. A margin of ±10 % lets the device ride through moderate supply fluctuations without derating. Internally, generation 1 electronics supervise all modulation tasks. This control method supports stable speed regulation during load changes and helps the drive maintain consistent motor response across a broad operating range.

Thermal management relies on a plug-through cooler rated for frames up to 110 kW, allowing most of the heat to dissipate outside the cabinet and reducing enclosure air temperature. Dynamic braking energy is handled by a built-in brake chopper, removing the need for an external resistor interface in many applications with frequent deceleration. An integrated mains filter suppresses conducted emissions at the switchgear level. For control power, the unit accepts 24 V standby power from an external source so that monitoring circuits remain active during mains isolation. Keeping the control supply available during shutdown also allows status functions to remain accessible when the motor power stage is not energized.