Product Description:

The RD52.1-4B-001-L-V1-P1-L1-FW is a modular drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. It converts incoming AC power into regulated motor voltage and current so that induction or synchronous motors can accelerate, decelerate, and hold a commanded speed in automated equipment. In production lines, it serves as the interface between PLC commands and the mechanical load, supporting controlled motion in conveyors, pumps, and material-handling axes. Its modular format also suits cabinet installations where several motion functions must operate together in a compact control system.

Speed and torque regulation are carried out through field-oriented vector control, allowing the controller to separate stator current into torque-producing and flux-producing components for responsive operation at low and changing speeds. When kinetic energy returns from the motor during braking, the circuitry directs it to a built-in brake chopper, which helps protect the DC link during deceleration. The power stage accepts line voltages from 380 to 480 V and uses a 3 × AC converter input arrangement, so it can connect directly to standard industrial power feeds. Input variation of ±10 % is permitted, which helps the drive continue operating normally when plant voltage rises or falls within that range.

Thermal management relies on forced air cooling, so the internal fan moves cabinet air across the heat sink during continuous duty. Conducted interference is reduced by an integrated mains filter, which helps limit line-borne noise without requiring a separate external filter module in many installations. For the control section and encoder retention during supply loss, an external source can provide 24 V standby power, allowing parameter memory and communication functions to remain active. The hardware uses design generation 1, matching the mechanical envelope and connector layout used across comparable first-generation RD 500 units.