RD51.1-4B-022-L-NN-FW Bosch Rexroth Indramat
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MPN: R911200525
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The Bosch Rexroth Indramat RD51.1-4B-022-L-NN-FW is a drive controller from the RD 500 Drive Controllers series with a rated power of 22 kW and a voltage range of 380 to 480 V. It features built-in brake chopper, integrated mains filter, and uses forced air cooling. The controller operates with U/f curve control and is designed for three-phase AC converter supply.
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Product Description:
The RD51.1-4B-022-L-NN-FW drive controller is produced by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. It is used in industrial automation to regulate the power delivered from the facility mains to standard AC machines, allowing controlled acceleration and adjustable operating speed. Typical applications include conveyor belts, pumps, and material-handling fans that benefit from variable motor speed during normal operation. The unit is intended for general drive duties rather than highly specialized motion profiles.
This model delivers a rated output of 22 kW, so connected motors can draw that level of mechanical power continuously under nominal conditions. Its supply section uses a 3 x AC converter design that accepts three-phase utility lines. The permissible input spans 380 to 480 V, and a tolerance of ±10 % helps the controller remain stable during common grid fluctuations. Motor torque is governed with U/f curve control, a scalar method that keeps the voltage-to-frequency ratio constant across the speed range. This control method is well suited to fans and pumps where dependable speed adjustment is more important than rapid position response.
Thermal management is handled by forced air cooling, meaning an internal fan directs airflow over heat sink fins to remove switching losses. Deceleration energy is absorbed inside the unit by the built-in brake chopper, so an external dynamic resistor is unnecessary for most loads. Line-side harmonics are reduced by the integrated mains filter, which lowers conducted interference without adding cabinet components. The controller belongs to design generation 1, which matches the first-generation mechanical layout and terminal arrangement used in this product line. Internal cooling, braking support, and line filtering reduce the amount of added cabinet hardware.
Frequently Asked Questions about RD51.1-4B-022-L-NN-FW:
Q: What is the rated power output of the RD51.1-4B-022-L-NN-FW drive controller?
A: The RD51.1-4B-022-L-NN-FW has a rated power output of 22 kW.
Q: What type of control method does the RD51.1-4B-022-L-NN-FW utilize?
A: This drive controller uses U/f curve control for motor management.
Q: Is a brake chopper included in the RD51.1-4B-022-L-NN-FW?
A: It includes a built-in brake chopper for braking operations.
Q: What voltage range is supported by the RD51.1-4B-022-L-NN-FW drive controller?
A: The RD51.1-4B-022-L-NN-FW supports input voltages from 380 to 480 V AC.
Q: Does the RD51.1-4B-022-L-NN-FW feature a built-in mains filter?
A: An integrated mains filter is provided in this model for reduced electrical noise.
