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Biomedical Optics & Medical Imaging

Fiber Optic Rotary Encoder for Extreme Environments

Micronor's has announced the TD5207 non-metallic fiber optic rotary encoder, designed specifically for use in motion control systems operating in extreme electromagnetic fields. Medical diagnostic and research applications include MRI or NMR tomography imaging systems. Industrial applications include electromagnetic phase or similar separation processes. The encoder also serves as the control feedback for pneumatic or hydraulic drive systems purposely operated in these same extreme environments and applications.

The encoder links to the MR310 Remote Encoder Interface Module via a single fiber link, which can be up to 1000 meters long. The "active" MR310 Module directly provides an array of conventional digital/analog speed and position feedback signals, including: A/B quadrature signals, programmable analog outputs (both 4-20mA and 0-10V) and RS232/RS422/RS485 serial interface.

The encoder system assigns each internal optical path (A or B) to a wavelength so that all wavelengths/paths can be combined onto a single fiber. These fiber optic sensors overcome the limitations of conventional optical rotary encoders which can be affected by EMI/RFI, ground loops, lightning and ESD as well as restricted use in explosive atmospheres.