RD51.1-4B-003-L-D1-FW Bosch Rexroth Indramat
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MPN: R911200349
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The Bosch Rexroth Indramat RD51.1-4B-003-L-D1-FW is a drive controller from the RD 500 Drive Controllers series with a rated power of 3.0 kW and operates within a voltage range of 380 to 480 V. It uses forced air cooling, features a built-in brake chopper, and comes with an integrated mains filter. The controller utilizes U/f curve control and includes a NAMUR terminal strip and external 24 V standby power.
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Product Description:
The RD51.1-4B-003-L-D1-FW is a unit from Bosch Rexroth Indramat in the RD 500 Drive Controllers series. As a converter-stage component, it regulates three-phase induction motors so production machinery can match torque and speed demands automatically during normal process changes. This first-generation design operates between a 380 to 480 V plant power supply and the motor, providing the closed-loop energy interface needed for repeatable positioning, conveying, pumping, and other speed-controlled machine functions.
A built-in brake chopper is present, allowing excess regenerative energy to be dissipated internally instead of feeding back to the supply. Motor flux is established by U/f curve control, which keeps the voltage-to-frequency ratio constant and supports predictable torque at lower speeds. Thermal stability is maintained through forced air cooling, which moves cabinet airflow across the heat sink during continuous duty. The power section accepts line voltages from 380 to 480 V, and component tolerances of ±10 % help the drive remain in operation during normal supply variation. Because this is design generation 1, its parameter structure and option boards follow the earliest RD 500 layout.
The inverter delivers a continuous output of 3.0 kW, which suits small pumps, fans, and conveyor zones within this power range. It is supplied as a three-phase AC converter, so the main bridge rectifies incoming power before the IGBT inverter reconstructs the required waveform for the motor. An integrated line filter attenuates conducted emissions and can reduce the need for external EMC hardware. This arrangement also helps keep cabinet integration straightforward in standard industrial enclosures. Control wiring terminates on a NAMUR terminal strip, and auxiliary circuits can remain active through external 24 V standby power, which helps maintain communication when the main supply is isolated. Firmware is ordered separately so the revision can match existing parameter files and fieldbus options.
Frequently Asked Questions about RD51.1-4B-003-L-D1-FW:
Q: Does the RD51.1-4B-003-L-D1-FW have a brake chopper integrated?
A: The RD51.1-4B-003-L-D1-FW drive controller includes a built-in brake chopper for efficient braking support.
Q: What type of control does the RD51.1-4B-003-L-D1-FW drive controller use?
A: This model uses U/f curve control for managing motor speed and torque.
Q: What voltage range does the RD51.1-4B-003-L-D1-FW accept?
A: It supports a voltage range from 380 to 480 V for input supply.
Q: How is the RD51.1-4B-003-L-D1-FW drive controller cooled?
A: The RD51.1-4B-003-L-D1-FW features forced air cooling to maintain optimal operating temperatures.
Q: What is the rated power output of the RD51.1-4B-003-L-D1-FW?
A: The rated output power of this drive controller is 3.0 kW.
