Product Description:

The RS51.1-4G-014-L-V1-FW/S117 is a drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. Classified as a basic drive, the unit regulates three-phase induction motors in plant machinery where speed must follow a predefined voltage-to-frequency profile. It is intended for cabinet installation and supplies the automation system with adjustable motor power while interfacing with upstream protection and control circuits.

This controller accepts input from a three-phase AC converter supply and operates across a nominal line window of 380 to 480 V. The permissible mains fluctuation is limited to ±10%, allowing the device to ride through moderate voltage swings without derating. Its power section is rated for 14 kVA, matching medium-sized pumps, fans, or conveyor drives. Closed-loop regulation is not employed; instead, the motor follows a programmed U/f curve control profile that keeps torque production proportional to frequency for constant-torque applications. A built-in converter stage, DC link, and gate circuitry together generate the required output frequency spectrum for standard industrial motors.

Thermal management is handled by forced-air cooling that directs cabinet air across the heat sink to maintain semiconductor temperature within limits. Dynamic braking energy is diverted into a built-in brake chopper and resistor, eliminating the need for an external dump assembly. To reduce conducted emissions, the power section includes an integrated mains filter. Control electronics remain energized during machine standby through an external 24 V standby power connection, safeguarding parameter memory and fieldbus communication. The product belongs to design generation 1, and the firmware is supplied as a separate subposition so the software level can be selected without replacing the hardware.