Rotary encoder for harsh environments

Newbury Park, CA—MR314 ZapFree high-resolution hollow shaft fiber-optic rotary encoder from Micronor Inc. is intended for harsh and hazardous environments.

05/02/2006


Discrete Control
MR314 ZapFree high-resolution, hollow-shaft fiber optic rotary encoder from Micronor is intended for harsh environments that require EMI immunity.

Newbury Park, CA —MR314 ZapFree high-resolution hollow shaft fiber-optic rotary encoder from Micronor Inc . is intended for harsh and hazardous environments. Designed to accommodate the needs of large drive applications, such as EMI immunity, high resolution (1,024 pulses per revolution or ppr), and the mounting convenience of a hollow shaft package, the device offers wide temperature operation (-60 to 150 °C) and is immune to lightning and high-voltage static and plasma fields, radiation resistant, intrinsically safe, and ATEX compliant. No integral electronics reside within the encoder housing and the optical design requires just one fiber connection.

Passive design covers a wide range of environments. Special versions can be engineered for thermal-vac situations. Product optically links to an "active" MR310 ZapFree remote encoder interface (REI) module using one 62.5/125 multimode fiber link up to 1,000 m (3,280 ft) away. Convenient DIN-rail mount lets the module be co-located with a PLC or other system interface electronics where power supply and conventional electrical interface connections can be made. Module offers a wide range of standard interfaces, including direct quadrature outputs, separate multiplier/divider quadrature outputs, two programmable analog outputs (4-20 mA and

Interface module firmware also allows the encoder to emulate a multi-turn absolute encoder. A software command or TTL signal input establishes a calibration or zero reference. External battery back-up is required to maintain operation during power operations. MR314—and all encoders in the MR3XX series—use wavelength division multiplexing technology by assigning each internal optical path to a wavelength so all wavelengths and paths can be combined onto one fiber.

—Control Engineering Daily News Desk
Jeanine Katzel, senior editor, jkatzel@reedbusiness.com





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