Product Description:

The RD52.1-4B-007-L-NN-G2-T1-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. In automated production lines, this unit sits between the line supply and an induction or synchronous motor to regulate torque and speed according to process demands. By adjusting output frequency and voltage, the controller supports precise motion profiles and efficient operation in conveyors, packaging stations, and similar equipment. Because it manages motor output in real time, it can also support smooth acceleration and stable operation when load conditions change during normal production cycles.

This model is rated for a continuous mechanical output of 7.5 kW, so the connected motor can deliver that level of shaft power during normal operation. It accepts line voltages from 380–480 V, and the control electronics remain stable with line variation up to ±10%, which helps the drive stay operational on common industrial power systems. That input range fits many standard industrial distribution systems used for machine power. Incoming energy is supplied through a three-phase AC converter input, allowing direct connection to standard plant feeders. Heat from the power semiconductors is removed by forced air cooling, so the unit should be installed where air can move freely across the heat sink.

For dynamic braking cycles, the RD52.1 family includes a built-in brake chopper, which lets regenerative energy be dissipated without a separate external module. Motor flux is calculated and adjusted through field-oriented vector control, helping the drive maintain linear torque response at low speed and during load changes. Conducted emissions toward the supply are reduced by an integrated mains filter, which can simplify panel layout in many installations. The unit is part of design generation 1 and is supplied without additional option cards, leaving the standard control configuration intact.