RD51.1-4N-018-L-CF-FW Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
MPN: R911200650
Ask for AvailabilityThe 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.
Internal Product Review
The RD51.1-4N-018-L-CF-FW is a Bosch Rexroth Indramat drive controller with an integrated mains filter. U/f curve control and forced air cooling support stable speed regulation and consistent thermal performance in variable-frequency applications. Rated at 18.5 kW for 380 to 480 V operation, the unit is a strong choice for industrial drive systems.
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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.
