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Allen Bradley RDB Direct Drive Motors RDB-B21539-3B72AA

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RDB-B21539-3B72AA

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The RDB-B21539-3B72AA is characterized as a direct-drive servo motor by Allen-Bradley. It operates at 400 volts with a frame size of 215 mm. This unit features a bearingless housing design and includes three magnet stacks.

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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for RDB-B21539-3B72AA

ManufacturerAllen Bradley
Product TypeDirect-Drive Servo Motor
Product LineRDB Direct Drive Motors
Part NumberRDB-B21539-3B72AA
Weight32.00 lbs (14.51 kg)
Housing TypeBearingless Housing
Voltage400V
Frame Size215 mm
Magnet Stacks3
Base Speed750 rpm
FeedbackSingle-turn, 2048 sin/cos, absolute encoder (EnDat protocol)
EnclosureIP65
ConnectorsCircular (SpeedTec) DIN
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The RDB-B21539-3B72AA from Allen-Bradley operates as a direct-drive servo motor, reflecting advanced engineering for precise motion control. This design features a bearingless housing, contributing to a compact and efficient form. The motor is rated for 400 volts and has a frame size measuring 215 mm, accommodating diverse application needs.

Operating at a base speed of 750 rpm, this unit demonstrates capability in various dynamic environments. It incorporates three magnet stacks to enhance performance and reliability.

For feedback, the motor utilizes a single-turn absolute encoder, providing 2048 sin/cos resolution through the EnDat protocol. This ensures precise position tracking. The RDB-B21539-3B72AA also enjoys an IP65-rated enclosure, offering substantial protection against dust and moisture. Circular connectors, specifically SpeedTec DIN types, provide straightforward and reliable connections.

Revision Part #Also known as
RDB-B21539-3B72AA Ser ARDB-B21539-3B72AA/A, Series A, Rev A
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