RD52.1-4B-011-L-V1-FW Bosch Rexroth Indramat
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MPN: R911200205
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The Bosch Rexroth Indramat RD52.1-4B-011-L-V1-FW is a drive controller in the RD 500 Drive Controllers series, featuring a built-in brake chopper and integrated mains filter. It offers field oriented vector control, uses forced air cooling, and supports a voltage range of 380 to 480 V with a tolerance of ±10 percent.
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Product Description:
The RD52.1-4B-011-L-V1-FW is a drive controller built by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. The unit operates as the power conversion and motor-regulating stage in automated conveyors, packaging equipment, and general motion systems, translating three-phase line power into controlled voltage and frequency for precise torque and speed response. Because it performs closed-loop current and flux regulation, it serves as the primary interface between higher-level PLC commands and the rotating machine.
The control loop is based on field-oriented vector control, so stator currents are resolved into orthogonal components to maintain constant flux under dynamic load changes. The power section accepts line voltages from 380 to 480 V, which lets the same hardware operate on both 400 V and 460 V facility power systems. It is supplied as a 3 x AC converter module, meaning rectification and DC-link functions are integrated instead of relying on an external common bus. Input fluctuations within a ±10 % range are tolerated without derating, which helps the drive remain in service on weak or lightly regulated feeders. Heat generated by the IGBTs and chokes is removed through forced air cooling, so the housing includes a fan channel and requires unobstructed cabinet airflow.
A built-in brake chopper directs regenerative energy into an external resistor, preventing DC-link overvoltage during rapid deceleration. Harmonic attenuation is handled by the integrated line filter, so separate line reactors are not necessary. For control electronics that must stay active when line power is isolated, the controller provides 24 V standby power through an external source, allowing parameter retention and fieldbus monitoring. The mechanical layout corresponds to design generation 1, which keeps the mounting footprint aligned with earlier RD 500 installations.
Frequently Asked Questions about RD52.1-4B-011-L-V1-FW:
Q: Does the RD52.1-4B-011-L-V1-FW include a brake chopper?
A: The RD52.1-4B-011-L-V1-FW comes with a built-in brake chopper for energy dissipation during braking cycles.
Q: What voltage range does the RD52.1-4B-011-L-V1-FW support?
A: This model supports a voltage range from 380 to 480 V AC, providing flexible input compatibility for different industrial environments.
Q: What control method does the RD52.1-4B-011-L-V1-FW utilize?
A: The RD52.1-4B-011-L-V1-FW uses field oriented vector control for precise and efficient motor operation.
Q: How is the RD52.1-4B-011-L-V1-FW drive controller cooled?
A: Forced air cooling is used to maintain optimal operating temperatures in the RD52.1-4B-011-L-V1-FW.
Q: Does the RD52.1-4B-011-L-V1-FW have a built-in mains filter?
A: This controller comes standard with an integrated mains filter, reducing electrical interference from the power supply.
