Product Description:

The RD52.1-4B-132-F-NN-NN-NN-FW is a drive controller produced by Bosch Rexroth Indramat in the RD 500 Drive Controllers series. Designed for variable-speed control of induction or synchronous motors on production lines, conveyors, and process machinery, the unit converts fixed line power into regulated output that follows torque and speed commands from a PLC or motion processor. By adjusting motor current and frequency, it helps coordinate multiple axes, protect equipment from overload, and improve energy efficiency in automated plants. It is suitable for applications that need controlled acceleration, stable running speed, and repeatable response during changing load conditions.

At the power stage, the controller can deliver up to 132 kW of mechanical output when paired with suitably rated motors. It is intended for supply grids in the 380 to 480 V range and is connected as a three-phase AC converter, so it draws line power directly without an external transformer. Allowable voltage fluctuation is limited to ±10%, which supports operation on industrial feeds that experience moderate sag or swell. Torque production is regulated with field-oriented vector control, a closed-loop method that maintains alignment between stator current and rotor flux for accurate dynamic response during load changes.

For deceleration cycles, the controller incorporates a built-in brake chopper that redirects regenerated energy to a braking resistor and helps prevent DC bus overvoltage. Thermal management relies on forced-air cooling with integrated liquid circulation. This arrangement moves heat from internal components into a liquid circuit and then expels it with fan-driven airflow, which helps sustain rated current in compact cabinets. Line-side interference is limited by an integrated line filter that attenuates conducted emissions to meet plant EMC rules. The unit is part of design generation 1 and has no additional I/O or communication plug-ins installed.