Product Description:

The RS51.1-4G-024-S-NN-FW basic drive is manufactured by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. As a scalable converter, it regulates the speed and torque of three-phase induction motors in automated machinery and material-handling lines. By combining power conversion and line conditioning in one housing, the unit supplies controlled energy to downstream loads and coordinates with higher-level PLCs for sequence management. This layout supports centralized cabinet installation where motor control and incoming line conditioning are handled by the same drive assembly.

Electrical input to the drive is accepted from a three-phase AC mains connection, allowing balanced feeding from industrial mains. Within this topology, the converter maintains a nominal operating window of 380 to 480 V while tolerating normal supply variation. At that range, the power section can deliver up to 24 kVA to the motor terminals, which suits medium-power conveyors, pumps, and extruders. Motor flux is managed by U/f curve control, which links output voltage and frequency so magnetizing current remains stable across the speed band. This control method is well suited to general-purpose induction motor applications that do not require more complex vector regulation. Harmonics on the supply side are reduced by an integrated mains filter, so an external filter cabinet is not required.

The drive uses a built-in brake chopper and resistor to dissipate excess DC-bus voltage during fast stops. This allows braking energy to be handled inside the unit during deceleration of connected loads. Line fluctuation limits are set by a ±10% tolerance, which helps the converter remain stable during common utility swings. The unit is part of generation 1 of the series. This version comes without optional technology functions, so its configuration remains focused on core speed and torque control.