Product Description:

The RD52.1-4B-018-P-V1-FW is a drive controller manufactured by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. It serves as the central power and control interface between the AC supply and a controlled motor, allowing adjustable speed and torque in automated production cells, conveyors, and process equipment. The unit is part of design generation 1 within the RD500 platform. This arrangement lets a single device manage both motor power conversion and responsive closed-loop control.

Incoming power is accepted through a voltage window of 380 to 480 V, and the converter stage tolerates normal utility variation within that range. The supply arrangement is a 3 x AC converter supply, meaning three sinusoidal phases are rectified and modulated by the internal IGBTs. Nominal output capability reaches 18.5 kW, which suits mid-range pump, fan, or extruder duty. Regulation is handled by field-oriented vector control, which separates torque-producing and flux-producing current components for accurate response across the speed range. Thermal energy from the power stage is discharged through a heat dissipation panel, so most cabinet layouts do not require added forced-air ducting.

Dynamic braking energy is handled by a built-in brake chopper, so no external resistor trigger circuitry is required. An integrated mains filter reduces conducted emissions returned to the plant distribution system. The power electronics remain stable with a supply variation band of ±10 %, helping the drive maintain predictable control when the line deviates from nominal. For control backup, the terminal strip accepts an external 24 V standby power source that keeps the control board active during an input power loss. That backup supply allows the unit to retain status information and complete an orderly shutdown if the main input drops briefly.