RD51.1-4B-018-L-F1-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: R911200417
Ask for AvailabilityThe Bosch Rexroth Indramat RD51.1-4B-018-L-F1-FW is a drive controller in the RD 500 Drive Controllers series, featuring a rated power of 18.5 kW and a voltage range of 380 to 480 V. It uses forced air cooling, has an integrated mains filter and brake chopper, and is designed for converter 3 x AC supply.
Internal Product Review
The RD51.1-4B-018-L-F1-FW is a Bosch Rexroth Indramat drive controller with U/f curve control and a 380 to 480 V input range. Forced air cooling and an integrated mains filter support stable operation and cleaner cabinet integration. The built-in brake chopper complements the 18.5 kW rating for a well-balanced drive package.
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Product Description:
The RD51.1-4B-018-L-F1-FW is a drive controller manufactured by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It serves as a variable-speed inverter that links a control system to an induction motor, applying a scalar voltage-to-frequency profile to match motor torque and speed to process demands. By combining power conversion, protective filtering, and thermal management in one housing, the unit is well suited for conveyors, mixers, and packaging machines where compact cabinet layouts are important. This arrangement also reduces the need for separate external components and helps simplify panel wiring.
The controller is rated for 18.5 kW of motor output and accepts input power in the range of 380–480 V. Line fluctuations are accommodated within ±10 %, helping the drive maintain stable motor magnetization when the incoming supply is not perfectly regulated. The front-end rectifier uses a three-phase AC converter topology to supply the inverter stage with DC link power. Speed reference is handled through U/f curve control, which keeps stator voltage and frequency in proportion to support torque production across a broad operating range. Because the drive uses scalar control, it is suited to applications that need dependable speed variation without more complex feedback-based motor regulation.
Dynamic braking energy is managed by a built-in brake chopper that diverts excess DC link voltage into an external resistor bank during deceleration. Thermal loading is moderated by forced-air cooling, allowing the unit to sustain output while keeping the heat sink within normal limits. Electromagnetic compatibility is supported by an integrated mains filter, which helps reduce conducted noise returning to the supply. Drive status is supported by current filter feedback (U6, V6, W6), allowing supervisory control to monitor the condition of the phase filters. These diagnostic signals can help a higher-level controller react quickly to abnormal filter conditions or phase-related faults. The unit is design generation 1.
