RD51.1-4B-200-R-NN-FW Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
MPN: R911200763
Ask for AvailabilityThe Bosch Rexroth Indramat RD51.1-4B-200-R-NN-FW is a drive controller in the RD 500 Drive Controllers series and features a rated power of 200 kW. It includes a built-in brake chopper, liquid cooling with internal pump for high power applications, and operates on 3 phase AC with a voltage range of 380 to 480 V.
Internal Product Review
The RD51.1-4B-200-R-NN-FW is a Bosch Rexroth Indramat drive controller rated for 200 kW and built for converter 3 x AC supply. U/f curve control and an integrated mains filter support stable operation and straightforward panel integration. A built-in brake chopper further strengthens dynamic handling, making this controller an excellent fit for high-power drive applications.
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Product Description:
The RD51.1-4B-200-R-NN-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. This unit regulates three-phase induction motors in automated machinery, matching motor speed to process demand while protecting the connected converter section. By combining power conversion, control electronics, and protective hardware in one assembly, it simplifies panel layouts and supports large-scale motion or pumping systems in industrial settings. It can be used where stable speed control is needed for continuous-duty equipment such as process lines, ventilation systems, and heavy conveyor installations.
Motor regulation is carried out through U/f curve control, so the output frequency and voltage stay proportional and maintain constant flux in the motor windings. The device accepts a mains window of 380 to 480 V, giving flexibility for facilities that run on either 400 V or 460 V networks. Inside that range, it delivers up to 200 kW of usable output power, making it suitable for compressors, extruders, or centrifuges with substantial load demand. Input fluctuations are handled within a tolerance of ±10 %, allowing continued operation during moderate line sag or swell without nuisance trips. The power stage uses a Converter 3 x AC design, so rectification, DC-link energy storage, and inverter output are contained in one housing.
Thermal stability is maintained by liquid cooling with an internal pump on versions rated at 132 kW and above. The closed loop moves coolant through an internal channel, removing heat without large airflow and helping keep enclosure temperatures steady. Dynamic deceleration energy is absorbed by a built-in brake chopper, eliminating the need for an external resistor switch. An integrated mains filter reduces conducted emissions and helps limit interference on the supply line. As a product of design generation 1, it follows the first revision of the series. Its control slot remains open because no additional drive functions are installed, so the unit is arranged for straightforward core drive operation.
