Product Description:

The RD52.1-4B-200-F-W1-FW is produced by Bosch Rexroth Indramat as a member of the RD 500 Drive Controllers series. Installed in control cabinets, the unit interfaces with plant three-phase supply lines and governs the operation of large industrial motors used on conveyors, mixers, and machining centers. Inside automated cells, it converts incoming energy, runs closed-loop modulation routines, and coordinates braking so motion profiles follow PLC commands without exceeding electrical or mechanical limits. This type of controller is commonly used where stable motor speed, torque response, and controlled deceleration are required across varying process loads.

The controller is dimensioned for systems that demand 200 kW of continuous output. It tolerates utility variation because its input window spans 380 to 480 V and remains stable within ±10% of those levels. Since the front end is a 3-phase AC converter, the module rectifies each input phase, stores energy in the DC link, and then reconstructs a variable-frequency waveform. Torque commands are processed with field-oriented vector control, which separates flux and torque components for fast acceleration and accurate low-speed behavior. A built-in brake chopper dissipates regenerated energy during deceleration, preventing DC-bus overvoltage and eliminating the need for external resistors. This allows the drive to support both constant-speed process duty and dynamic changes in load.

Thermal management is achieved through forced-air cooling with integrated liquid circulation; the fan moves cabinet air across the heat sink, while an internal channel allows connection to a coolant loop for high-duty cycles. High-current paths are provided by 95 mm² terminals C and F for ratings of 132 kW or higher, which helps limit conductor losses when full power is drawn. The hardware belongs to design generation 1 and supports compatible first-generation RD option cards. An integrated mains filter attenuates conducted emissions so the installation can meet plant EMC limits. The product is classified as a drive controller, and its required software is ordered separately to match the application.