RD51.1-4B-200-R-NN-FW Bosch Rexroth Indramat
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MPN: R911200763
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The 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.
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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.
Frequently Asked Questions about RD51.1-4B-200-R-NN-FW:
Q: Is a brake chopper included in the RD51.1-4B-200-R-NN-FW drive controller?
A: The RD51.1-4B-200-R-NN-FW features a built-in brake chopper for efficient energy dissipation during braking cycles.
Q: What control type does the RD51.1-4B-200-R-NN-FW utilize?
A: This model operates using U/f curve control, allowing for adjustable voltage-to-frequency operation and efficient speed regulation.
Q: What cooling method is used in the RD51.1-4B-200-R-NN-FW drive controller?
A: The RD51.1-4B-200-R-NN-FW uses a liquid cooling system with an internal pump for power levels of 132 kW and above.
Q: What is the rated power output of the RD51.1-4B-200-R-NN-FW?
A: This drive controller delivers a rated power output of 200 kW, supporting demanding industrial applications.
Q: What input voltage range does the RD51.1-4B-200-R-NN-FW support?
A: The RD51.1-4B-200-R-NN-FW can operate on a supply voltage range from 380 to 480 V AC with a ±10% tolerance.
