RD51.1-5B-004-L-D1-FW Bosch Rexroth Indramat
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MPN: R911200788
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The Bosch Rexroth Indramat RD51.1-5B-004-L-D1-FW is a drive controller from the RD 500 Drive Controllers series. It operates with a 500 V voltage range and uses U/f curve control. The controller features a built-in brake chopper and forced air cooling.
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Product Description:
The RD51.1-5B-004-L-D1-FW is a Bosch Rexroth Indramat unit in the RD 500 Drive Controllers series. It is intended to modulate the voltage and frequency supplied to three-phase induction motors, giving a straightforward way to control speed and torque in conveyors, mixers, and general material-handling stations. By combining power conversion, control logic, and system diagnostics in a single enclosure, the product supports both distributed and cabinet-mounted installation while reducing external wiring. In routine operation, it adjusts motor output to match process demand instead of running the motor only at fixed line frequency. This makes it suitable for process lines where steady motor behavior is needed during changing load conditions.
The controller uses a Converter 3 x AC front end that accepts line potentials up to 500 V, fitting typical 480 V factory supplies without a step-down transformer. Motor regeneration is handled by a built-in brake chopper, which directs excess DC-link energy to an external resistor so braking torque can be produced without oversizing the drive. Regulation is based on U/f curve control, an open-loop method that maintains approximately constant flux across the speed range for standard induction motors. Because this control method does not depend on encoder feedback, it suits applications that favor simple motor wiring and stable speed regulation rather than high-dynamic servo motion. Thermal stability is maintained by forced air cooling, and the integrated fan moves air along the heat sink fins to keep semiconductor temperatures within the allowable range during continuous duty.
As a design generation 1 model, the unit uses the first RD platform layout for its housing and connector arrangement. Control and auxiliary power enter through a NAMUR terminal strip with external 24 V standby power, so signal functions can remain active when the main supply is isolated. Classified as a Drive Controller, the unit combines I/O handling, protective monitoring, and motor control functions in one package. Its integrated logic handles command processing and basic supervisory tasks inside the same enclosure. The built-in diagnostic functions help the system respond to operating faults without requiring separate hardware for basic drive supervision.
Frequently Asked Questions about RD51.1-5B-004-L-D1-FW:
Q: Does the RD51.1-5B-004-L-D1-FW drive controller have an integrated brake chopper?
A: The RD51.1-5B-004-L-D1-FW is equipped with a built-in brake chopper for effective braking energy management.
Q: What control method does the RD51.1-5B-004-L-D1-FW use?
A: This drive controller uses U/f curve control for managing motor operation.
Q: How is the RD51.1-5B-004-L-D1-FW drive controller cooled?
A: The RD51.1-5B-004-L-D1-FW employs forced air cooling for temperature regulation during use.
Q: What is the design generation of the RD51.1-5B-004-L-D1-FW?
A: This model is a design generation 1 drive controller from Bosch Rexroth Indramat.
Q: What voltage range and supply type does the RD51.1-5B-004-L-D1-FW support?
A: The RD51.1-5B-004-L-D1-FW operates with a 500 V supply from a 3-phase AC converter.
