Product Description:

The RD52.1-4B-007-L-V1-P1-L1-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. As a closed-loop power electronics unit, it regulates three-phase induction or synchronous motors in automated machinery, matching commanded torque and speed profiles to process requirements. Generation 1 design features allow the module to sit between the plant’s AC mains and the motor, interpreting higher-level control signals while safeguarding power conversion.

Rated output power is 7.5 kW, giving sufficient headroom for mid-range pumps, fans, or conveyor axes. The supply section accepts line voltages from 380 to 480 V, and because the unit is specified as a 3 x AC converter, it rectifies and modulates three-phase input without external transformers. Vector processing relies on field-oriented vector control, so motor flux and torque are decoupled for rapid dynamic response. Heat generated by the IGBTs and control electronics is removed through forced-air cooling, which uses an internal fan to maintain semiconductor temperatures within safe limits. The included mains filter, design generation, and product tolerance values work alongside these core capabilities to stabilize operation under fluctuating load and line conditions.

A built-in brake chopper dissipates regenerated energy during rapid deceleration, preventing DC-bus overvoltage and protecting connected components. For electromagnetic compliance, the controller incorporates an integrated mains filter, allowing installation in cabinets without additional line filtering hardware. Input fluctuations are handled within a ±10 % tolerance band, so nominal performance is maintained even when the plant supply drifts. During emergency stops or machine idle periods, the logic circuits can be held active by the external 24 V standby power, keeping fieldbus communication alive while the main converters are de-energized.