RD51.1-5N-005-L-NN-FW Bosch Rexroth Indramat
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MPN: R911201251
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The Bosch Rexroth Indramat RD51.1-5N-005-L-NN-FW is a drive controller in the RD 500 Drive Controllers series. It features U/f curve control and a converter supply type with a voltage range of 500 V. This model has a rated power output of 5.5 kW and uses forced air cooling.
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Product Description:
The RD51.1-5N-005-L-NN-FW is a drive controller from Bosch Rexroth Indramat in the RD 500 Drive Controllers series. It regulates induction motors in conveyor, pump, or fan applications by adjusting supply frequency and voltage along a predefined curve. Positioned between a three-phase mains circuit and the machine, the unit provides speed adjustment and soft-start capability for general-purpose industrial automation tasks. This operating method helps reduce abrupt starting behavior and supports smoother motor acceleration during routine machine cycles. It is suited to applications where adjustable motor speed is needed, but full servo-style position control is not required.
The controller delivers a nominal output of 5.5 kW, allowing it to run medium-sized asynchronous machines without current derating. It accepts line voltages within a 500 V range and is supplied as a 3 x AC converter, which means it uses a three-phase input and produces a variable-frequency output for the motor. Speed regulation follows U/f curve control, so voltage rises with frequency to help maintain stable magnetic flux through the speed range. Thermal management relies on forced-air cooling, where an integrated fan moves air through the heat sink to maintain semiconductor temperatures during continuous duty. That control method is commonly used in variable-torque systems because motor speed can be matched to process demand without complex feedback hardware.
The unit is supplied without a built-in brake chopper, so applications with regenerative braking need an external module to dissipate returned energy. It belongs to design generation 1, which places it in the first RD 500 design release. The optional feature slot is not equipped, leaving the expansion position open for a user-selected I/O or communication interface. An external braking component is only needed when the load can return significant energy during deceleration. Leaving the expansion position open allows the controller to be adapted later with interface hardware that matches the machine layout.
Frequently Asked Questions about RD51.1-5N-005-L-NN-FW:
Q: What is the rated power output of the RD51.1-5N-005-L-NN-FW drive controller?
A: The RD51.1-5N-005-L-NN-FW features a rated power of 5.5 kW.
Q: What type of power supply does the RD51.1-5N-005-L-NN-FW require?
A: This model is designed for operation with a 3-phase AC converter supply.
Q: What is the supported voltage range for the RD51.1-5N-005-L-NN-FW?
A: The RD51.1-5N-005-L-NN-FW supports a voltage range of 500 V.
Q: Does the RD51.1-5N-005-L-NN-FW drive controller have a built-in brake chopper?
A: This unit does not include a built-in brake chopper.
Q: What type of cooling is utilized in the RD51.1-5N-005-L-NN-FW?
A: Forced air cooling is used for thermal management in this drive controller.
