RD51.2-5B-015-L-A1-FW Bosch Rexroth Indramat
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MPN: R911203502
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The 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.
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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.
Frequently Asked Questions about RD51.2-5B-015-L-A1-FW:
Q: Does the RD51.2-5B-015-L-A1-FW drive controller feature a brake chopper?
A: The RD51.2-5B-015-L-A1-FW includes a built-in brake chopper for managing regenerative energy.
Q: What type of control method is used by the RD51.2-5B-015-L-A1-FW?
A: This drive controller operates with U/f curve control for motor speed regulation.
Q: How is the RD51.2-5B-015-L-A1-FW drive controller cooled?
A: The RD51.2-5B-015-L-A1-FW uses forced air cooling to maintain optimum operating temperatures.
Q: What is the rated power output of the RD51.2-5B-015-L-A1-FW?
A: This model is rated for 15.0 kW, supporting applications with significant power requirements.
Q: What supply type and voltage range does the RD51.2-5B-015-L-A1-FW support?
A: The RD51.2-5B-015-L-A1-FW is designed to work with a 3-phase AC converter supply and handles a voltage range of 500 V.
