RD51.1-4B-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: R911200272
The Bosch Rexroth Indramat RD51.1-4B-005-L-NN-FW is part of the RD 500 Drive Controllers series and features U/f curve control. This drive controller has a rated power of 5.5 kW with a voltage range of 380 to 480 V and includes a built-in brake chopper and integrated mains filter. It uses forced air cooling and is designed for converter 3 phase AC supply.
Internal Product Review
The RD51.1-4B-005-L-NN-FW is a drive controller rated for 5.5 kW applications. U/f curve control and forced air cooling support stable motor handling and dependable thermal performance in continuous-duty service. The built-in brake chopper and integrated mains filter make the controller a well-engineered choice for clean installation and controlled deceleration.
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Product Description:
The RD51.1-4B-005-L-NN-FW belongs to the RD 500 Drive Controllers series produced by Bosch Rexroth Indramat. It is a drive controller intended for industrial automation systems where precise regulation of three-phase AC motors is needed to manage speed and torque under varying loads in conveyors, pumps, and other general-purpose machinery. It adjusts output frequency and voltage so the connected motor can respond more closely to process demand instead of running at a fixed line speed. No integrated application-specific functions are included, so any additional I/O or fieldbus features must be provided externally when the machine requires them.
This model supplies a continuous output of 5.5 kW, allowing it to handle medium-sized machinery during normal duty cycles. The input network can range from 380 to 480 V, so one controller suits multiple regional power grids. This voltage range can simplify installation in facilities that use different standard three-phase supplies. Because it is built as a Converter 3 x AC, the device accepts three-phase mains directly and generates a variable AC waveform for the motor. Line fluctuations up to ±10 % are permissible, which eases installation on feeds with modest voltage swing. Heat produced by the power stage is expelled through forced air cooling; a fan directs airflow over internal heat sinks and helps stabilize internal temperature during continuous operation.
A built-in brake chopper dissipates regenerated energy during rapid deceleration and helps protect the DC link from overvoltage. During stop cycles with high inertia, that braking energy is converted to heat instead of raising the internal bus voltage. Line-side harmonics are reduced by the integrated mains filter, which can lower conducted noise returning to the supply network. Speed command follows a U/f curve control profile, making the controller suitable for induction motors that do not require full vector feedback and for variable-speed loads such as fans and pumps. The unit is classified as design generation 1, which identifies the platform used for this controller.
