Micronor presents fibre-optic rotary encoder
A
Micronor product story
Edited by the Engineeringtalk editorial team
Jan 13, 2009
Micronor has launched the MR316 Zapfree fibre-optic rotary encoder, designed for heavy-duty motor drive applications requiring EMI immunity, Atex compliance and IP66 ingress protection.
The 90mm sensor features a large 12mm shaft and extra heavy-duty bearings and shaft seals.
Micronor's MR316 Zapfree fibre-optic rotary encoder has been designed for heavy-duty motor drive applications requiring EMI immunity, Atex compliance and IP66 ingress protection.
Together with the remote MR310 module, the Zapfree encoder system combines three functions in one - incremental encoder, multi-turn position sensor and tachometer.
Typical applications include petrochemical plants, oil rigs, steel mills, aerial cable cars, cranes and hoists.
The MR316's all-optical, totally passive design outperforms resolvers as well as conventional optical and magnetic encoders.
It has a wide operating range (-60 to 150C), outdistances copper cable, is intrinsically safe and ATEX-compliant, is immune to EMI/RFI and ground loops, is unaffected by high magnetic fields, and is radiation-resistant.
Mounting options include synchro-clamps or panel-mount.
The 'passive' MR316 optically links to the 'active' MR310 ZapFree remote encoder interface (REI) module via a single 62.5/125 multimode fibre link - up to 1,000m away.
With its standard DIN-rail mount, the MR310 module is co-located with the PLC or other system interface electronics, where power supply connections and conventional electrical interface connections are easily made.
The module offers a wide range of standard interfaces: direct quadrature outputs (both push-pull and line driver), separate multiplier/divider quadrature outputs, two fully-programmable analogue outputs (4-20mA and +/-10V), and PC-friendly RS232/RS422/RS485 serial interface.
For custom applications, the MR310 firmware can be easily enhanced with additional functions and modes of operation to offload previous forms of remote processing for more efficient system operation.
Zapfree encoders use telecom-proven WDM (wavelength division multiplexing) technology by assigning each internal optical path (A or B) to a wavelength so that all wavelengths/paths can be combined onto a single fibre.
The use of multiple fibres is deliberately avoided, as this tends to drive up the cost of the optical harness.
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