RD51.1-4B-045-L-DF-FW Bosch Rexroth Indramat
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MPN: R911203126
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The Bosch Rexroth Indramat RD51.1-4B-045-L-DF-FW is a drive controller from the RD 500 Drive Controllers series with a rated power of 45 kW and operates on a voltage range of 380 to 480 V. It features a built-in brake chopper, U/f curve control, and forced air cooling. The controller has an integrated mains filter and uses an external 24 V stand-by power supply through a NAMUR terminal strip.
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Product Description:
The RD51.1-4B-045-L-DF-FW is a drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It sits between a three-phase mains supply and the AC motor load, modulating voltage and frequency so that conveyor, pump, or process equipment can run at commanded speeds. By integrating power conversion, control, and protective functions in one unit, the device helps support variable-speed automation without separate external braking or filtering hardware. This type of controller is commonly used where smooth motor acceleration and adjustable process speed are needed under changing load conditions.
In nominal operation, the controller delivers up to 45 kW of output, which is the maximum continuous power available to the connected motor without derating. Its input section accepts line voltages from 380 to 480 V, and because it is a three-phase AC converter, it is intended for symmetrical industrial power networks. Supply fluctuations are accommodated by a tolerance of ±10%, allowing stable operation when the incoming line rises or falls within that range. Thermal energy generated by the inverter stage is removed through forced air cooling, so cabinet layout must allow a clear airflow path. During regenerative braking events, the power section uses a built-in brake chopper to direct excess DC-link energy to an external resistor.
Speed regulation is handled by U/f curve control; this open-loop method maintains a proportional relationship between output voltage and frequency, making the unit suitable for standard induction motors that do not require vector feedback. Line-side compliance is supported by an integrated mains filter that attenuates conducted emissions and helps the installation meet electromagnetic compatibility limits without extra components. For control wiring, the unit provides a NAMUR terminal strip with external 24 V standby power, giving field devices a dedicated low-voltage supply and a standardized sensor connection. This arrangement supports orderly connection of auxiliary control devices while keeping the power and signal functions clearly separated.
Frequently Asked Questions about RD51.1-4B-045-L-DF-FW:
Q: What is the rated power output of the RD51.1-4B-045-L-DF-FW drive controller?
A: The RD51.1-4B-045-L-DF-FW has a rated power output of 45 kW, suitable for high-capacity industrial applications.
Q: Does the RD51.1-4B-045-L-DF-FW include a brake chopper?
A: A built-in brake chopper is included with this model for managing braking energy.
Q: What cooling method does the RD51.1-4B-045-L-DF-FW utilize?
A: Forced air cooling is used to maintain optimal operating temperatures in this drive controller.
Q: What supply voltage range is supported by the RD51.1-4B-045-L-DF-FW?
A: The RD51.1-4B-045-L-DF-FW supports a voltage range from 380 to 480 V for supply input.
Q: Is a mains filter integrated in the RD51.1-4B-045-L-DF-FW drive controller?
A: An integrated mains filter is present to reduce electrical noise and disturbances.
