RD51.1-5B-007-D-CF-FW Bosch Rexroth Indramat
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MPN: R911203260
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The Bosch Rexroth Indramat RD51.1-5B-007-D-CF-FW is a drive controller in the RD 500 Drive Controllers series with a rated power of 7.5 kW and supports a voltage range of 500 V. This controller features a built-in brake chopper, U/f curve control, and uses a plug-through cooler for cooling. It is designed for use with a converter 3 x AC supply and includes the combination of C1 and F1 functions.
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Product Description:
The RD51.1-5B-007-D-CF-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. It links a three-phase mains supply to an induction motor, adjusting voltage and frequency so that motor speed matches the real-time demands of industrial automation lines. All power electronics, gating logic, and monitoring circuits are contained in one enclosure, giving panel builders a single unit for variable-speed control without separate converter components. That arrangement helps process equipment ramp up smoothly and respond to changing load conditions without direct-on-line motor operation.
The controller supplies up to 7.5 kW of continuous mechanical power, which suits medium-duty pumps, fans, and conveyors. Its input section is rated for 500 V operation, allowing direct connection to higher-voltage factory grids. Because it is a 3 × AC converter, it rectifies three-phase AC, stores energy in a DC link, and then synthesizes variable-frequency output for the motor. Motor flux is regulated through U/f curve control, which maintains a constant voltage-to-frequency ratio so torque remains steady as speed changes. This control method is commonly used where reliable speed adjustment is needed without more complex vector tuning. Heat from the IGBTs is removed by a plug-through cooler for units up to 110 kW; this mounting style projects the heat sink outside the enclosure wall, reducing cabinet temperature rise and simplifying airflow design.
During rapid deceleration or overhauling loads, a built-in brake chopper directs surplus DC-link energy to an external resistor, preventing overvoltage faults. When a braking resistor is connected, regenerated energy can be dissipated instead of forcing the DC bus voltage upward. Functional flexibility is provided by Combination: C1 + F1, which combines standard speed regulation with extended fieldbus features. The unit is part of design generation 1, so its option slots and dimensions follow the first RD51 mechanical layout. The firmware is ordered as a separate subposition, allowing the required software package to be selected for the intended control setup.
Frequently Asked Questions about RD51.1-5B-007-D-CF-FW:
Q: What is the rated power output of the RD51.1-5B-007-D-CF-FW drive controller?
A: The RD51.1-5B-007-D-CF-FW offers a rated power output of 7.5 kW for a variety of drive tasks.
Q: What type of power supply is supported by the RD51.1-5B-007-D-CF-FW?
A: This controller supports a three-phase AC converter supply, making it suitable for industrial power systems.
Q: Does the RD51.1-5B-007-D-CF-FW include a brake chopper feature?
A: A built-in brake chopper is included in this model to efficiently dissipate excess braking energy.
Q: What control method does the RD51.1-5B-007-D-CF-FW use?
A: The RD51.1-5B-007-D-CF-FW uses U/f curve control for motor management.
Q: How is the RD51.1-5B-007-D-CF-FW drive controller cooled?
A: This drive controller is equipped with a plug-through cooler for cooling purposes up to 110 kW.
