RD51.1-5B-022-L-DF-FW Bosch Rexroth Indramat
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MPN: R911203217
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The Bosch Rexroth Indramat RD51.1-5B-022-L-DF-FW is a drive controller from the RD 500 Drive Controllers series. It features a built-in brake chopper, operates at a rated power of 22 kW, and uses forced air cooling. The controller employs U/f curve control and is designed for a 500 V, 3-phase AC converter supply.
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Product Description:
The RD51.1-5B-022-L-DF-FW is a drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It regulates the speed and torque of asynchronous motors used in conveyor lines, mixers, and other material-handling stations. By rectifying incoming three-phase power and then feeding a synthesized voltage waveform to the motor terminals, the unit supports precise acceleration, controlled braking, and continuous speed adjustment so the mechanical load can be coordinated with surrounding automation equipment. This operating method makes the controller suitable for applications that need steady motor behavior as process demand changes during normal production.
A built-in brake chopper dissipates regenerated energy when the motor decelerates, preventing DC-bus overvoltage. Speed regulation follows U/f curve control, meaning the controller keeps a fixed ratio between voltage and frequency to maintain stable torque on squirrel-cage motors. The drive is rated for a continuous mechanical output of 22 kW, allowing it to handle midsize pumps, fans, and extruders without derating. Its input section is designed for mains in the 500 V range, so it ties directly to three-phase networks without an isolation transformer. Thermal management relies on forced air cooling, and an internal fan moves air across heat sinks so full power can be delivered within the specified temperature band. This control approach is well suited to installations that require reliable speed variation without adding unnecessary feedback hardware.
The power section is fed from a 3 x AC converter supply that rectifies each phase before inversion. The device belongs to design 1, indicating the first release of this version. Control terminals include a NAMUR terminal strip with external 24 V standby power, which keeps diagnostic circuitry active even when the main link is open. For diagnostics, the control board also provides current-filter feedback (U6, V6, W6), enabling external meters or a supervisory PLC to monitor the three output currents in real time. These signal connections support status observation during operation and help the drive integrate cleanly with higher-level control systems.
Frequently Asked Questions about RD51.1-5B-022-L-DF-FW:
Q: Does the RD51.1-5B-022-L-DF-FW include a brake chopper?
A: The RD51.1-5B-022-L-DF-FW drive controller features a built-in brake chopper for managing regenerative braking energy.
Q: What type of control does the RD51.1-5B-022-L-DF-FW utilize?
A: This model supports u/f curve control, enabling control of the output voltage-to-frequency ratio.
Q: What cooling method is used in the RD51.1-5B-022-L-DF-FW drive controller?
A: The RD51.1-5B-022-L-DF-FW is equipped with forced air cooling to maintain optimal operating temperature.
Q: What is the rated power of the RD51.1-5B-022-L-DF-FW?
A: The rated power output for this drive controller is 22 kW, suitable for medium to large applications.
Q: What type of power supply and voltage is required for the RD51.1-5B-022-L-DF-FW?
A: The voltage supply for this device must be 3-phase AC with a range of 500 V.
