RD51.1-5B-045-L-DL-FW Bosch Rexroth Indramat
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MPN: R911201073
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The Bosch Rexroth Indramat RD51.1-5B-045-L-DL-FW is a drive controller from the RD 500 Drive Controllers series. It features U/f curve control, a rated power of 45 kW, and is designed for a voltage range of 500 V. The unit uses forced air cooling and includes a built-in brake chopper for enhanced operation.
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Product Description:
The RD51.1-5B-045-L-DL-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. It regulates three-phase induction motors in automated machinery by adjusting output voltage and frequency to match process demands, enabling speed control and energy coordination on conveyor, pump, and fan axes. This operating method allows the motor to run at the speed required by the application instead of remaining fixed at line frequency, which supports stable process control and more flexible machine operation. Because the output frequency is adjustable, the controller can also reduce mechanical shock during startup and help the driven system respond more smoothly to changing throughput or flow requirements.
This unit contains a built-in brake chopper, so excess regenerative energy is dissipated internally during deceleration. The control algorithm uses U/f curve control, where voltage increases with frequency to help maintain motor flux across the usable speed range. Thermal management is handled by forced air cooling, which moves cabinet air through the heat sink to protect the power semiconductors during sustained operation. The controller is rated for 45 kW motor loads and operates on a 500 V mains supply, making it suitable for mid-range industrial drive duties. Internal braking support is useful on applications with frequent stopping, where returned energy would otherwise increase the DC bus voltage. The unit is design version 1.
On the supply side, the device is a 3 x AC converter, so it rectifies incoming three-phase power before generating a variable AC output for the motor. The control terminals are arranged on a NAMUR terminal strip, and the logic electronics can remain active through a separate 24 V standby power input when the mains supply is isolated. Keeping the control section energized in that condition allows communication and stored status information to remain available to the higher-level system. Diagnostic functions include cable damping feedback (C3, D3), which helps the controller account for long cable effects that can influence pulse quality and signal behavior on extended runs.
Frequently Asked Questions about RD51.1-5B-045-L-DL-FW:
Q: Does the RD51.1-5B-045-L-DL-FW include a brake chopper?
A: The RD51.1-5B-045-L-DL-FW has a built-in brake chopper for dynamic braking control.
Q: What type of control does the RD51.1-5B-045-L-DL-FW drive controller use?
A: This model uses U/f curve control for motor management.
Q: How is the RD51.1-5B-045-L-DL-FW drive controller cooled?
A: Forced air cooling is implemented to maintain optimal operating temperatures in this drive controller.
Q: What is the rated power output of the RD51.1-5B-045-L-DL-FW?
A: The RD51.1-5B-045-L-DL-FW is rated for 45 kW of output power.
Q: What supply type and voltage does the RD51.1-5B-045-L-DL-FW support?
A: This drive controller operates with a 3-phase AC supply and supports a voltage range of 500 V.
