RD51.1-4B-055-L-F1-FW Bosch Rexroth Indramat
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MPN: R911200625
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The Bosch Rexroth Indramat RD51.1-4B-055-L-F1-FW is a drive controller from the RD 500 Drive Controllers series with a rated power of 55 kW and a voltage range of 380 to 480 Volts. It features a built-in brake chopper, integrated mains filter, and uses forced air cooling. This controller supports U/f curve control and current filter feedback for U6, V6, and W6.
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Product Description:
The RD51.1-4B-055-L-F1-FW is a three-phase AC drive controller produced by Bosch Rexroth Indramat in the RD 500 Drive Controllers series. In an automation cell, it converts constant grid power into a regulated output that controls the speed and torque of attached induction motors. By managing the electrical link between the plant supply and motion hardware, the unit enables coordinated process control without mechanical gear changes. It mounts inside control cabinets and interfaces with sensors, contactors, and higher-level PLCs through standard wiring, supporting variable-speed operation of pumps, fans, and conveyors across processing plants. The arrangement lets the drive vary motor speed smoothly during startup, normal running, and controlled stopping.
The controller is fed from a three-phase AC supply and is rated for line voltages between 380 to 480 V; this window accommodates both 50 Hz and 60 Hz utility networks while keeping component stress within the declared ±10 % tolerance. Under these conditions, the unit delivers a continuous motor output of 55 kW, allowing one drive to handle medium-power production machinery such as extruders or chippers. Speed reference is established through U/f curve control, so flux is maintained in proportion to frequency without closed-loop encoder feedback, which suits most scalar-controlled induction motors. This method is commonly used where stable process speed matters more than rapid position changes.
A built-in brake chopper is integrated on the DC link, so regenerative energy from fast deceleration is dissipated internally rather than returned to the mains. Component temperatures are controlled by forced-air cooling, so the cabinet must allow unobstructed airflow through the heat sink channels, and an integrated mains filter reduces conducted emissions on the supply lines. The drive uses design 1, and its current filter feedback at U6, V6, and W6 supports diagnostic measurement of phase currents.
Frequently Asked Questions about RD51.1-4B-055-L-F1-FW:
Q: Does the RD51.1-4B-055-L-F1-FW include a brake chopper?
A: The RD51.1-4B-055-L-F1-FW features a built-in brake chopper for effective energy dissipation during braking phases.
Q: What type of control does the RD51.1-4B-055-L-F1-FW support?
A: This model supports U/f curve control, which is typically applied for straightforward speed control across varying loads.
Q: How is the RD51.1-4B-055-L-F1-FW cooled during operation?
A: A forced air cooling system keeps the RD51.1-4B-055-L-F1-FW drive controller at optimal operating temperatures.
Q: What is the rated power output of the RD51.1-4B-055-L-F1-FW?
A: The rated output power for this drive controller is 55 kW, allowing support for moderate to large loads.
Q: What supply voltage range does the RD51.1-4B-055-L-F1-FW require?
A: It operates with a supply voltage range of 380 to 480 V, providing flexibility for varied AC supply networks.
