RD51.1-4N-018-L-CF-FW Bosch Rexroth Indramat
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MPN: R911200650
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The Bosch Rexroth Indramat RD51.1-4N-018-L-CF-FW is a drive controller from the RD 500 Drive Controllers series. It features U/f curve control and operates with a rated power of 18.5 kW. The controller is equipped with an integrated mains filter and uses forced air cooling, designed for a voltage range of 380 to 480 V.
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Product Description:
The RD51.1-4N-018-L-CF-FW drive controller is manufactured by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. The product is a standalone converter designed to adjust motor speed and torque in industrial automation cells that depend on accurate electrical control rather than mechanical throttling. By converting fixed mains power into variable-frequency output, it provides energy-efficient motion for pumps, fans, and conveyor modules.
Electrical performance centers on its control algorithm and supply ratings. The controller uses U/f curve control, a scalar method that keeps the ratio of voltage to frequency constant so standard induction motors maintain magnetic flux at partial loads. It accepts a line voltage of 380 to 480 V three-phase AC and tolerates deviations of ±10 %, allowing operation on grids with moderate fluctuations. Nominal output is 18.5 kW, giving it enough headroom for medium-sized production motors while remaining within typical cabinet heat budgets. The internal rectifier and inverter topology classify the unit as a 3 x AC converter, simplifying wiring because no external transformer is required. Thermal management is handled by forced air cooling, so cabinet designers must ensure unobstructed airflow paths for the integral fans.
Protection and application flexibility are supported by several integrated features. The unit is supplied without a built-in brake chopper, so dynamic braking requires an external resistor module. An integrated mains filter attenuates conducted emissions, helping installations comply with EMC limits without extra line filters. Functional options are organized as combination C1 + F1, allowing parameter sets for standard drive duties and process-oriented extensions. Because the electronics and software are separated in this design, the firmware is ordered as a separate subposition to match the desired function set. Converter losses are supervised by internal monitoring logic, and adjustments are made through front-panel keys or fieldbus nodes.
Frequently Asked Questions about RD51.1-4N-018-L-CF-FW:
Q: What input voltage range does the RD51.1-4N-018-L-CF-FW drive controller support?
A: The RD51.1-4N-018-L-CF-FW supports a voltage range of 380 to 480 V, suitable for standard industrial three-phase AC systems.
Q: What cooling method is used in the RD51.1-4N-018-L-CF-FW?
A: This model is equipped with forced air cooling to maintain optimal operating temperatures during use.
Q: Does the RD51.1-4N-018-L-CF-FW include a built-in mains filter?
A: The RD51.1-4N-018-L-CF-FW features integrated mains filtering for enhanced compatibility with supply lines.
Q: What is the rated power output of the RD51.1-4N-018-L-CF-FW?
A: The rated power output of this drive controller is 18.5 kW, supporting significant industrial loads.
Q: Is a brake chopper integrated into the RD51.1-4N-018-L-CF-FW drive controller?
A: This unit does not include a built-in brake chopper, which may be needed for certain dynamic braking applications.
