RD51.1-4B-004-D-NN-FW Bosch Rexroth Indramat
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MPN: R911201286
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The Bosch Rexroth Indramat RD51.1-4B-004-D-NN-FW is a drive controller in the RD 500 Drive Controllers series. It offers U/f curve control and comes with a built-in brake chopper and integrated mains filter. This controller operates with a voltage range of 380 to 480 volts and uses a plug-through cooler for cooling.
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Product Description:
The RD51.1-4B-004-D-NN-FW drive controller is manufactured by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. The device converts fixed-frequency three-phase power into a variable output for asynchronous motors used on conveyors, mixers, and material-handling axes. Internal control routines manage acceleration, steady running, and deceleration so the motor can follow commanded speed through changing load conditions. It is intended for applications that use open-loop speed control rather than position feedback. This makes the unit suitable for general industrial duties where reliable speed regulation is needed without the added complexity of closed-loop vector control.
The controller uses a three-phase AC converter input and accepts supply networks from 380 to 480 V, which supports installation on common industrial feeders. A tolerance band of ±10 % keeps the unit operating when normal line-voltage variation occurs. Motor flux is regulated by U/f curve control, which raises output voltage in step with frequency to support stable induction-motor operation across the speed range. During deceleration, a built-in brake chopper routes regenerated DC bus energy into the braking circuit for controlled dissipation. The integrated mains filter helps reduce conducted electrical noise at the power connection and supports cleaner operation on the supply line.
Thermal losses are removed by a plug-through cooler for drives up to 110 kW, which passes through the cabinet wall so a large share of the heat is released outside the enclosure. This cooling arrangement also helps reduce heat buildup around neighboring control equipment mounted inside the cabinet. The unit is part of design generation 1, so compatible option cards follow that revision. Application-specific software blocks are not included, and braking energy is dissipated through an external resistor connected to the chopper circuit. The drive can therefore be matched with the control software required for the intended motor application.
Frequently Asked Questions about RD51.1-4B-004-D-NN-FW:
Q: Does the RD51.1-4B-004-D-NN-FW drive controller have a brake chopper?
A: This model includes a built-in brake chopper for effective energy dissipation.
Q: What control method is used in the RD51.1-4B-004-D-NN-FW drive controller?
A: The RD51.1-4B-004-D-NN-FW utilizes U/f curve control for motor management.
Q: What type of cooling system does the RD51.1-4B-004-D-NN-FW use?
A: This drive controller features a plug-through cooler suitable for power ratings up to 110 kW.
Q: Is a mains filter included in the RD51.1-4B-004-D-NN-FW drive controller?
A: It has an integrated mains filter to reduce electrical noise and disturbances.
Q: What is the supply voltage range for the RD51.1-4B-004-D-NN-FW drive controller?
A: The RD51.1-4B-004-D-NN-FW operates on a 3-phase AC supply with a voltage range of 380 to 480 V.
