Product Description:

The RD51.1-4B-315-F-V1-FW belongs to the RD 500 Drive Controllers series produced by Bosch Rexroth Indramat. This three-phase drive controller converts incoming AC power and modulates it for variable-speed operation of high-capacity induction motors used in conveyors, presses, and similar automated equipment. By combining power conversion, motor control, and protective hardware in one unit, it supplies the regulated energy needed to keep large production machinery within commanded speed and torque limits. Its role is to provide controlled acceleration, stable running speed, and managed deceleration for motors that operate under substantial mechanical load.

This model operates from a three-phase AC converter supply and accepts line voltages from 380 to 480 V with a tolerance of ±10%, allowing connection to common industrial power systems without additional voltage conversion. Its continuous output capability reaches 315 kW, making it suitable for large motor installations that require sustained power delivery. Speed regulation is handled by U/f curve control, which maintains an appropriate voltage-to-frequency relationship as motor speed changes. A built-in brake chopper dissipates regenerated energy during rapid deceleration and helps protect the DC bus from overvoltage. Thermal management uses forced-air cooling with integrated liquid circulation, combining airflow across power components with an internal coolant path that supports stable temperature control during extended operation.

The controller also includes an integrated mains filter to reduce conducted emissions returned to the supply network. It provides 24 V standby power, so internal control circuits can remain active during brief supply interruptions and maintain response to external commands. These features are useful in plant systems where large rotating loads, frequent stopping cycles, or switching events can disturb the power line. Design generation 1 identifies the hardware generation used for this version.