RD51.1-4B-005-L-NN-FW Bosch Rexroth Indramat
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MPN: R911200272
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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.
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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.
Frequently Asked Questions about RD51.1-4B-005-L-NN-FW:
Q: Does the RD51.1-4B-005-L-NN-FW come with a brake chopper?
A: The RD51.1-4B-005-L-NN-FW features a built-in brake chopper for managing regenerative energy.
Q: What is the supported input voltage range for the RD51.1-4B-005-L-NN-FW drive controller?
A: This model supports input voltages ranging from 380 to 480 V for flexible installation.
Q: What type of cooling is used in the RD51.1-4B-005-L-NN-FW drive controller?
A: The RD51.1-4B-005-L-NN-FW uses forced air cooling to maintain optimal operating temperatures.
Q: What is the rated power output of the RD51.1-4B-005-L-NN-FW?
A: This drive controller has a rated power output of 5.5 kW.
Q: Does the RD51.1-4B-005-L-NN-FW include a mains filter?
A: It has an integrated mains filter, supporting cleaner operation with reduced electrical noise.
