Product Description:

The RD52.1-4B-015-L-NN-NN-NN-FW is a drive controller manufactured by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. Positioned between a three-phase power supply and an induction or synchronous motor, it converts fixed utility power into adjustable frequency and amplitude so motion commands can be followed accurately. By embedding vector-based current regulation, the unit supports positioning, speed, and torque loops required in automated material handling, packaging lines, and general machinery. It is supplied as a standalone chassis module ready for panel installation.

The controller can deliver a continuous mechanical output of 15.0 kW when the DC link is fed from a 380 to 480 V three-phase network. Input fluctuations are acceptable within a margin of ±10 %, allowing the device to ride through moderate voltage dips without nuisance trips. Because the supply side uses a 3 x AC converter, the rectifier and intermediate circuit are integral to the housing, removing the need for external power modules. Motor regulation is executed with field-oriented vector control, a method that maintains dynamic torque accuracy over the full speed range.

Thermal and protective features are built in. A built-in brake chopper dissipates regenerated energy during rapid deceleration so the DC bus voltage remains within limits. Heat produced by semiconductors is removed through forced air cooling, and clear airflow paths must be maintained when the unit is mounted in an enclosure. Incoming harmonics are attenuated by the integrated line filter, which simplifies compliance with plant EMC requirements. This model belongs to design generation 1. Optional application-specific functions are not included, so standard control functions handle startup, parameter setup, and diagnostics.