Product Description:

The RS51.1-4G-024-V-V1-FW is a Basic Drive module produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. It is intended for cabinet-mounted inverter systems, where it converts three-phase mains power into controlled AC output for induction motors used in conveyors, pumps, and other general automation equipment. By supplying adjustable voltage and frequency, the unit serves as the power stage for open-loop or closed-loop motor applications. This arrangement allows motor speed to be adjusted while keeping the installation compact for control cabinet use.

The input section accepts line voltages from 380 to 480 V. Its U/f curve control keeps a fixed volts-per-hertz relationship, which helps maintain predictable torque across the speed range without requiring vector feedback. The thermal design and power semiconductors support a continuous apparent power rating of 24 kVA, making the module suitable for mid-sized industrial machinery. Dynamic braking energy is handled by a built-in brake chopper and resistor, so no external braking hardware is needed for deceleration of high-inertia loads. Conducted emissions are reduced by an integrated mains filter, which supports connection to industrial power feeders without extra line suppression components.

The supply topology is listed as Converter 3 x AC, confirming that the unit is intended for symmetrical three-phase power systems. Input variation is permitted within ±10 %, allowing the drive to tolerate moderate line voltage sag or swell during operation. For the control electronics, the module uses external 24 V stand-by power so logic functions can remain active when the mains supply is disconnected. The unit is supplied with firmware ordered separately, which allows the software package to be matched to the intended application. This version corresponds to design generation 1, and its mechanical dimensions remain consistent with related RD 500 accessories.