RD51.1-5N-005-L-NN-FW Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
MPN: R911201251
Ask for AvailabilityThe 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.
Internal Product Review
The RD51.1-5N-005-L-NN-FW is a Bosch Rexroth Indramat drive controller built for converter 3 x AC input and U/f curve control. Forced air cooling supports stable thermal performance, and the 5.5 kW rating makes this unit a strong fit for steady industrial drive applications.
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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.
