21BRCX-310-F8-02 by Danaher

The Danaher 21BRCX-310-F8-02 is a high-performance resolver in the Dynapar Resolvers series, tailored for industrial automation feedback applications. It features a frame size of 21 (2.1 in outer diameter) and supports a frequency response of up to 120 kHz, ensuring rapid and accurate position sensing. Configurable pulses per revolution range from 240 to 1200, allowing precise resolution adjustment to meet specific control requirements. Designed for direct mounting on a NEMA 4-1/2 C-face without brackets, this resolver delivers continuous electrical output for servomotor feedback in harsh environments.

Incorporating a machine-wound stator and rotor primary construction, the 21BRCX-310-F8-02 utilizes a rotary transformer for limited rotation applications. It operates on an input voltage of 4.5–26 V DC with an input current draw of 80–95 mA, and provides a differential line driver output signal rated at 40 mA sink/source. Phasing is set at 90°±22° electrical with channel A leading B in the counter-clockwise direction. The housing employs a Single Servo Groove (F8) option and a 10-pin latching connector rated for NEMA 4/12 environments. Field-replaceable readhead design and modular construction allow rapid customization and maintenance while maintaining high reliability.

Built for extreme conditions, this frameless resolver operates from –40 °C to +85 °C standard, with extended operation up to +120 °C, and tolerates 98% RH non-condensing humidity. It resists shock up to 50 G (11 ms) and vibration up to 20 G (5–2000 Hz), and includes reverse polarity, overvoltage, and short-circuit protection. Its tooth-wound design reduces electrical error by 50% and offers inherent immunity to EMI, radiation, liquids, and particulates. These durability features, combined with absolute position feedback and configurable speed options, make the 21BRCX-310-F8-02 an ideal solution for demanding industrial automation and motion control systems.