Product Description:

The RD52.1-4B-200-F-M1-FW is a drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It serves as the central power stage for induction or synchronous machines used in automated production cells, conveying lines, and process equipment. By converting fixed mains power into a regulated output, the unit coordinates torque, speed, and position control so connected motors can follow programmed motion profiles. Because those control functions are handled inside the controller, the drive can respond quickly to load changes during starting, steady running, reversing, and controlled stopping. That operating role makes it suitable for machinery that depends on repeatable motor behavior across variable process conditions.

Incoming three-phase supply is accepted through a 3 x AC converter front end that operates within a line window of 380 to 480 V. Internally, the controller uses field-oriented vector control to synthesize precise stator currents, enabling full torque delivery up to its continuous rating of 200 kW. Dynamic braking is handled by a built-in brake chopper, so regenerative energy from decelerating loads can be dissipated inside the unit instead of requiring a separate braking module. This arrangement suits high-power hoists, extruders, and test stands that need stable speed regulation and predictable deceleration under changing load conditions. It also supports applications where rapid response and controlled motor behavior are important during repeated duty cycles.

The thermal design relies on forced-air cooling with integrated liquid circulation to stabilize semiconductor temperatures during sustained high-load cycles. An integrated mains filter reduces conducted emissions, and the unit accepts normal supply variation through a voltage tolerance of ±10%. The controller is supplied without output chokes, leaving line reactance selection to the system design when application conditions call for additional impedance. This layout keeps the base unit focused on power conversion, braking, and thermal management while allowing the surrounding installation to be matched to the motor and supply network. The combined cooling and filtering features also support use in enclosed industrial cabinets where heat control and electrical cleanliness are important.