RD51.2-5B-015-L-A1-FW Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
MPN: R911203502
Ask for AvailabilityThe Bosch Rexroth Indramat RD51.2-5B-015-L-A1-FW is a drive controller from the RD 500 Drive Controllers series with a rated power of 15.0 kW. It features U/f curve control, a built-in brake chopper, and uses forced air cooling. This controller operates as a converter for 3-phase AC power with a voltage range of 500 V and includes functions like stand-by-power external and starting lock-out.
Internal Product Review
The RD51.2-5B-015-L-A1-FW is a Bosch Rexroth Indramat drive controller designed for converter 3 x AC systems and 500 V operation. U/f curve control and forced air cooling support stable drive behavior and dependable thermal management in demanding installations. A built-in brake chopper adds practical braking capability, making the unit an excellent 15.0 kW drive solution.
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Product Description:
The RD51.2-5B-015-L-A1-FW is a drive controller produced by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. As a converter-based unit, it interfaces between a three-phase mains supply and an induction motor, regulating speed and torque in automated machinery and process lines. In industrial automation, its primary function is to modulate motor frequency and voltage so conveyors, pumps, or fans operate at commanded setpoints while maintaining electrical protection and system efficiency.
The controller is dimensioned for a continuous motor output of 15.0 kW, giving it the capacity to handle medium-sized production drives without overloading its power semiconductors. It draws energy from a three-phase AC converter front end, so it expects a balanced feeder and can return regenerative energy to that grid. The permissible DC link is built around a mains interval centered on 500 V, matching typical 460 V class networks. Thermal management relies on forced air cooling, and axial fans move heat away from the heat sink to keep internal components within their operating temperature range. A built-in brake chopper is integrated, and it dissipates excess DC-link voltage in a resistor when the connected motor decelerates to help prevent overvoltage trips during fast stops.
Command signals are processed through U/f curve control, so motor voltage rises proportionally with frequency to maintain magnetic flux without the feedback hardware demanded by vector regulation. The unit belongs to design generation 2, indicating compatibility with second-generation plug-in option cards and diagnostic tools released for the RD 500 family. Safety and energy-saving features include external stand-by power, which allows a low-power auxiliary supply to keep the control electronics active during shutdowns, and a starting lock-out that inhibits unintended restarts after mains loss. These functions support stable operation in applications where controlled stopping, restart prevention, and continued control-circuit availability are important during normal machine use.
