Product Description:

The RD52.1-4B-001-L-NN-NN-NN-FW is a drive controller manufactured by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. The unit converts three-phase mains power into precision-regulated motor output to control speed and torque in conveyors, packaging lines, and other motion axes used in industrial automation. Its control function lets the connected motor respond smoothly to changing load demands during acceleration, deceleration, and steady-speed operation.

At the power stage, it includes a built-in brake chopper, which absorbs regenerated energy during rapid deceleration and protects the DC link from overvoltage. Motor regulation is executed through field-oriented vector control, allowing independent adjustment of flux and torque for fast dynamic response. Thermal management relies on forced air cooling, and airflow across the heat sink keeps semiconductor junction temperatures within allowable operating limits when the drive runs at rated current. The input side contains an integrated mains filter that attenuates conducted electromagnetic noise and permits installation without extra line reactors in most cabinets. The controller accepts a 380 to 480 V three-phase supply, so it can be wired directly to common factory distribution networks.

The power interface is specified as a 3 × AC converter, meaning the rectifier and inverter stages are designed for symmetrical three-phase feeds, and all protective trips are calibrated to that topology. Voltage swings above or below nominal are tolerated within ±10 %, which helps the drive maintain stable modulation when the plant grid experiences minor dips or surges. Hardware markings indicate design generation 1, so its parameter sets and option slots correspond to the earliest release of the RD 500 platform. The base frame is not equipped with additional I/O or specialized process functions, so any required expansion must be handled through external modules.