Product Description:

The RD52.3-8C-110-W-V1-FW drive controller is built by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. It serves as an inverter stage that links a plant’s DC bus to three-phase motors, enabling programmable speed, torque, and direction changes in automated lines, conveyors, or processing equipment. By synthesizing variable output from a constant supply, the unit replaces mechanical speed-control hardware while maintaining tight interaction with higher-level PLC commands.

The controller delivers a rated output of 110 kW, giving it enough headroom for large pumps, extruders, or multi-motor gantries that demand continuous high power. Its internal power section is designed for a DC link that can rise to 700 V; this range sets both the insulation requirements of connected components and the permissible regenerative voltage returned from braking events. Heat generated at this operating level is removed through liquid cooling, so cabinet temperatures stay stable even when airflow is restricted. Command algorithms rely on field-oriented vector control; by resolving stator currents into rotating reference frames, the drive applies precise magnetic flux and torque values, improving response during acceleration and low-speed operation.

This model belongs to generation 3, so its interface cards and diagnostic functions align with the third hardware release in the RD platform. It is fed from an inverter DC supply, so no direct mains rectifier section is included, which simplifies parallel operation on a common bus. The logic section can stay active through an external 24 V standby power source, allowing parameter access while the main stages are de-energized. In software, the unit appears as Operating as RD51 SFT, ensuring compatibility with existing RD51 motion libraries. Its configuration is an SFT inverter, indicating option slots tailored for speed-frequency-torque control rather than regenerative or servo-positioning variants.