Product Description:

The RD52.1-5B-030-L-V1-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. Intended for industrial automation cells, it manages the energy flow between the line supply and an AC motor so that velocity and torque follow programmed setpoints from PLCs or motion processors. By using vector-based control algorithms, the unit supports process lines such as conveyors and extruders where stable speed regulation is required. This arrangement lets the drive adapt motor output to changing load conditions without requiring separate speed-control hardware.

The controller delivers a rated output of 30 kW, allowing it to run medium-power machinery without additional parallel drives. It is designed for a three-phase input as a 3 x AC converter, and this topology rectifies and inverts the incoming source to supply adjustable frequency and voltage. Acceptable line levels fall within the 500 V range, so associated switchgear must match that insulation class. Motion is calculated using field-oriented vector control, a closed-loop method that regulates flux and torque separately for fast dynamic response. That control approach improves low-speed torque behavior and helps the motor hold commanded speed under varying process load. Thermal performance is stabilized by forced air cooling, and cabinet airflow removes internal heat during continuous full-load operation.

The power stage also contains a built-in brake chopper, enabling direct connection of a braking resistor to dissipate regenerated energy during deceleration. For the control electronics, an external 24 V standby power line keeps the processor active when the main supply is isolated, which supports diagnostics and parameter retention. Separating the standby supply from the main power section allows monitoring and control functions to remain available during controlled shutdowns or temporary power loss. The hardware belongs to generation 1, so its option cards, connectors, and mechanical dimensions match the first release of the RD 500 platform.