RD51.1-4N-090-L-C1-FW Bosch Rexroth Indramat
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MPN: R911200433
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The Bosch Rexroth Indramat RD51.1-4N-090-L-C1-FW is a drive controller in the RD 500 Drive Controllers series with a rated power of 90 kW and supports a voltage range of 380 to 480 Volts. It uses U/f curve control, features forced air cooling, and includes an integrated mains filter. The unit operates as a 3-phase AC converter and provides external 24 V standby power for outputs up to 110 kW.
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Product Description:
The RD51.1-4N-090-L-C1-FW is a drive controller from Bosch Rexroth Indramat in the RD 500 Drive Controllers series. It functions as an AC drive controller that converts fixed-frequency three-phase power into a variable output for induction motors used on conveyors, mixers, and general automation axes. By regulating voltage and frequency, it supports soft starts, controlled acceleration, and energy-efficient speed adjustment while mounting inside a control cabinet and communicating with higher-level PLCs.
The controller supplies up to 90 kW of mechanical power, which indicates the largest motor size it can support during continuous operation. It operates on an input window of 380 to 480 V, matching common low-voltage industrial grids. Internally, it is configured as a Converter 3 x AC, so it rectifies the incoming supply, stabilizes the DC bus, and inverts it back to regulated AC for the motor. Motor flux is maintained with U/f curve control, which keeps voltage proportional to frequency as speed changes. Heat generated in the power electronics is removed through forced air cooling, so cabinet airflow must remain unobstructed during sustained operation.
The power section tolerates supply deviations of ±10 %, allowing continued operation during brief voltage dips or surges. Because the design is supplied without a built-in brake chopper, applications that require rapid stopping need an external braking resistor. An integrated mains filter limits conducted emissions and can reduce the need for separate EMC components on the line side. Control electronics remain active through 24 V stand-by power, which keeps communication functions and stored parameters available when the main feeder is isolated. The unit is generation 1 hardware.
Frequently Asked Questions about RD51.1-4N-090-L-C1-FW:
Q: What is the rated power output of the RD51.1-4N-090-L-C1-FW drive controller?
A: This model provides a rated power output of 90 kW.
Q: What voltage range can the RD51.1-4N-090-L-C1-FW accept?
A: It supports a voltage range from 380 to 480 V for input supply.
Q: What control type is used in the RD51.1-4N-090-L-C1-FW drive controller?
A: The RD51.1-4N-090-L-C1-FW uses U/f curve control as its control method.
Q: Does the RD51.1-4N-090-L-C1-FW include a mains filter?
A: This drive controller features integrated mains filtering.
Q: What type of cooling does the RD51.1-4N-090-L-C1-FW drive controller use?
A: Forced air cooling is employed for thermal management in this model.
