Product Description:

The RS51.1-4G-014-D-NN-FW/S150 is a basic drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. As a basic drive, it converts three-phase mains power into a regulated output for induction motors used in industrial automation lines, conveyors, and material-handling cells. The unit is intended for straightforward scalar control and integrates braking, filtering, and cooling hardware in a compact housing. This type of control is commonly used where precise servo positioning is not required, but reliable speed regulation is still important for routine plant motion.

This controller is rated for 14 kVA of apparent power and accepts line voltages from 380 to 480 V. It regulates motor speed through U/f curve control, so the output frequency follows a fixed volts-per-hertz profile that suits constant-torque loads. A built-in brake chopper and resistor dissipates regenerated energy during rapid deceleration, helping prevent DC-link overvoltage without extra hardware. An integrated mains filter attenuates line-side harmonics and simplifies cabinet wiring. Thermal management is handled by a plug-through cooler sized for drives up to 110 kW, with heat sinks that pass through the panel so power devices are cooled by ambient air while the control electronics remain inside the enclosure.

The power stage is energized from a three-phase AC converter supply and can accommodate input variations within a ±10% tolerance, maintaining stable operation on weak or fluctuating grids. The model is part of Design generation 1, which supports first-generation RD 500 option cards and mounting hardware. No additional application functions are enabled at delivery, so the unit can be paired with a separately ordered application package. This allows the same hardware platform to be adapted to the intended process without changing the drive enclosure.