Product Description:

The RD52.1-4B-015-L-V1-FW is a drive controller manufactured by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. Designed for use in industrial automation lines, it regulates three-phase motors so that conveyor, pump, and positioning equipment can follow speed or torque commands from a PLC. By performing real-time current control and power conversion, the unit bridges low-level motor circuitry with higher-level plant control systems, and its modular layout supports different control configurations for specific machine requirements.

Electrically, the controller is supplied through a 3 x AC converter input and operates across a line window of 380 to 480 V; a tolerance of ±10% helps absorb typical utility fluctuations without derating. Within this range, it can deliver a continuous mechanical output of 15.0 kW, making it suitable for mid-power production axes that require steady motor performance during changing process loads. Motion is generated with field-oriented vector control, a method that separates stator currents into torque-producing and flux-producing components to maintain precise speed regulation when load inertia changes. This control approach also improves response during acceleration, deceleration, and variable-torque operation.

A built-in brake chopper dissipates regenerated energy during deceleration and helps prevent overvoltage on the DC link. Thermal management uses forced air cooling, so ducted airflow keeps semiconductor temperatures stable during cyclic peaks and sustained operation. Upstream harmonic attenuation is aided by an integrated mains filter, which removes the need for an external RFI module in many cabinet layouts. The control electronics remain active when machine power is removed because the unit accepts 24 V standby power from an external supply.