Product Description:

The RD51.1-4N-015-L-NN-FW-S111 drive controller is built by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. Designed for cabinet installation, the unit converts fixed-frequency mains power into a variable output that matches motor requirements. This allows precise speed control, energy savings, and smoother mechanical engagement in automated production cells. It is suitable for cabinet-mounted systems where adjustable motor speed helps reduce shock during starts and stops.

It operates from a three-phase line supply in a 3 x AC converter configuration, and it accepts line voltage from 380 to 480 V. The inverter bridge is sized for a continuous mechanical output of 15.0 kW, so medium-capacity drives can be supported without requiring larger hardware. Input excursions are tolerated within a ±10% tolerance band that helps avoid nuisance trips during normal supply variation. Motor excitation is handled with U/f curve control, which maintains a proportional volts-per-hertz relationship to support stable magnetic flux across the operating speed range. Thermal management relies on forced-air cooling, and internal fans move cabinet air across the heat sinks to limit semiconductor temperature during sustained load. An integrated mains filter attenuates conducted emissions to support use in industrial electrical systems.

The power section is without a built-in brake chopper, so external braking hardware is required when the application returns energy during deceleration. The hardware layout corresponds to design generation 1, which supports compatibility with first-generation option cards and mounting accessories. The software package is ordered as a separate subposition, allowing the controller to be matched to the required fieldbus or application package. No supplemental technology functions are installed, which keeps the configuration focused on standard variable-speed drive tasks.