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Fiber Optic Rotary Encoders
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Micronor MR310/MR320 series are the only 100% Passive Fiber Optic Incremental Encoders on the market today. The innovative design is based on a non-electrical, all-optical passive sensor linked to a remote interrogator module via a industry-standard fiber optic link. Features include:
 
 
• Passive optical sensor eliminates need for remote power supply, isolation barriers and EX cabinets
• Immune to EMI, RFI, lightning, high voltages, and ground loops
• Standard temperature range -40C to +80C; Optional Extended temperature option -60C to +150C
• Sensors are Ex classified "simple mechanical device" and can be installed in all manner of hazardous locations and explosive environments - mines, gas and dust
• Controller provides "inherently safe, optical radiation" and can be installed in non-hazardous location up to 2500 meters away
• ATEX approved for EPL Mb/Gb/Gc/Db/Dc applications
• Provides interference-free encoder feedback over long distances
• Outperforms resolvers and electronics-based encoders in challenging environments
 
The original MR310 series was launched in 2004 and granted U.S. Patent 7,196,320. Our product launch customer Frey AG uses the heavy duty MR316 sensor and MR310 interrogator for control of aerial cable cars installed in mountain resorts and cities all over the world. One of these is the Portland Tram in Portland, Oregon. In 2009, Micronor launched the first commercially-available, MRI-compatible encoder. In 2011, Micronor launched the second generation MR320 series of fiber optic incremental encoders.
 

 
 
Fiber optic encoders provide interference-free feedback in challenging environments such as mines, steel mills and oil rigs. The diagram below illustrates a typical application where the fiber optic encoder is used to provide noise-free, closed loop feedback for precise control of a VFD or High Voltage Drive system:
 

 
We recommend the MR320 series for new applications but the MR310 series is still available. For MR320 product info, scroll down or use these direct links:
 
MR320 Controller Module
• Standard 360ppr Sensors: MR322 MR326
• High Resolution 1024ppr Sensors: MR324 MR325
• MRI-Compatible 360ppr Sensor: MR328



>>Article: Fiber Optic Rotary Encoder Offers EMI Immunity in Harsh Environments
 

 
MR302-1 | Controller Module for MR30X series Incremental Encoders
MR302-1 is a DIN rail mount controller module for use in conjunction with a MR303 Fiber Optic Linear or MR304 Rotary Incremental Sensors.
  • +24V Operation
  • Programmable line driver A/B quadrature outputs - 5V, 12V, 24V
  • HOMING input for reseting internal position counter
  • Built-in USB and Modbus/RS485 serial interfaces
  • Downloads: datasheet | manual | drawing | image | CAD_Files
     
    MR304 | ZapFREE® Size 11 Incremental Rotary Encoder
    MR304 is a Size 11 Mini Incremental Encoder ideal for medical and industrial robotic applications:
  • 100% electrically passive, all-optical sensor
  • Immune to EMI, RFI and High Voltages
  • 512ppr resolution
  • Distances up to 2000 meters
  • Downloads: datasheet | manual | drawing | image
     
    MR320 | Controller for MR320 Series Fiber Optic Incremental Encoders
    The MR320 is the remote interface for the MR320 series ZapFREE Fiber Optic Incremental Encoder System. The MR320 series Controller and Sensors are identical to the original MR310 series with the following enhancements:
  • User friendlier Duplex LC (push-pull) interface
  • Optical loss budget increased to 12.5dB
  • Encoder links up to 2500 meters

  • MR320 Controller Module offers multiple built-in interfaces for compatibility with PLC and motor drive systems:
  • Dual quadrature outputs: A/A'/B/B' line driver and A/B push-pull
  • Dual analog outputs (4-20mA and 0-10V); fully programmable for POSITION or SPEED
  • Programmable 24-bit POSITION COUNTER supports single or multiturn applications
  • MULTIPLIER/DIVIDER function drives separate A/B quadrature outputs
  • Built-in RS422/RS485 serial interface
  • Built-in Modbus-RTU interface
  • Built-in USB interface
  • Supports RS232 with optional MR232-1 adapter
  • All internal operating parameters are user programmable using supplied ZAPPY software
  • Inherently safe optical radiation, suitable for EPL Mb/Gb/Gc/Db/Dc applications

  • For application note AN112 on how to interface the MR320/MR330 Controllers to National Instruments LabVIEW, please click here.

    To download the MR310/MR320 Controller's ZAPPY configuration software, please click here.

    Downloads: datasheet | manual | drawing | image | CAD_Files | Declaration_Of_Conformity
     
    MR322 | ZapFREE® Size 58mm Fiber Optic Incremental Encoder, up to 360ppr
    MR322 series Incremental Encoder offers 100-360ppr resolution in an industry standard Size 58mm encoder housing. The sensor is ideal for motor speed control and low resolution position monitoring.
  • Non-electrical, all-optical passive sensor
  • Immune to EMI, RFI, lightning, high voltages and ground loops
  • Ex classified "inherently safe, simple mechanical device"
  • For use in all manner of hazardous locations and explosive environments - mines, gas and dust
  • Standard temperate range is -40 to +80C
  • Extended Temperature option: -60C to +150C.
  • Downloads: datasheet | manual | drawing | image | CAD_Files | Declaration_Of_Conformity
     
    MR324 | ZapFREE® Size 100mm Hollow Shaft Incremental Encoder, 1024ppr resolution
    MR324 High Resolution (1024ppr) Hollow Shaft Incremental Encoder is ideal for closed-loop feedback of variable frequency drives (VFD) and other high capacity/high voltage motor drives operating in challenging environments.
  • Non-electrical, all-optical passive sensor
  • Immune to EMI, RFI, lightning, high voltages and ground loops
  • Ex classified "inherently safe, simple mechanical device"
  • For use in all manner of hazardous locations and explosive environments - mines, gas and dust
  • Standard temperate range is -40 to +80C
  • Extended Temperature option: -60C to +150C.
  • Through bore model rated IP54
  • Pocket hole model rated IP66
  • Downloads: datasheet | manual | drawing | image | CAD_Files | Declaration_Of_Conformity
     
    MR325 | ZapFREE® Size 125mm Fiber Optic Incremental Encoder, 1024ppr resolution
    MR325 Series High Resolution (1024ppr) Incremental Encoder is ideal for closed-loop feedback of variable frequency drives (VFD) and other high horsepower motor drive systems operating in challenging environments.
  • Non-electrical, all-optical passive sensor
  • Immune to EMI, RFI, lightning, high voltages and ground loops
  • Ex classified "inherently safe, simple mechanical device"
  • For use in all manner of hazardous locations and explosive environments - mines, gas and dust
  • Standard temperate range is -40 to +80C
  • IP67 ingress protection
  • Downloads: datasheet | manual | drawing | image | CAD_Files | Declaration_Of_Conformity
     
    MR326 | ZapFREE® Size 90mm Heavy Duty Incremental Encoder, up to 360ppr resolution
    MR326 series is a heavy duty Size 90mm shaft sensor for heavy equipment applications with high bearing loads and requiring robust shaft seals. Features include:
  • Non-electrical, all-optical passive sensor
  • Immune to EMI, RFI, lightning, high voltages and ground loops
  • Ex classified "inherently safe, simple mechanical device"
  • For use in all manner of hazardous locations and explosive environments - mines, gas and dust
  • Standard temperate range is -40 to +80C
  • Extended Temperature option: -60C to +150C.
  • IP66 ingress protection
  • Downloads: datasheet | manual | drawing | image | CAD_Files | Declaration_Of_Conformity
     
    MR326-MRAD | Fiber Optic MRAD Measuring Wheel System
    The Fiber Optic MRAD Measuring Wheel System is designed for challenging environment test and monitoring appications where EMI immunity and/or long distance feedback is required. A special Measuring Arm (part number 9350.02.093) and 0.5-meter tufted rubber-coated Measuring Wheel (part number 9350.02.095) has been designed for use with the MR326 Fiber Optic Incremental Encoder (360ppr resolution). Sample applications include:

  • Monitoring wheel speed of electric wheelchair during dynamometer testing (EMI immunity required)
  • Monitoring rotation of the new High Roller ferris wheel in Las Vegas
  • Monitoring conveyor system in high voltage process environment
  • EMC and Dynamometer test suites
  • Downloads: datasheet | manual | drawing | image | CAD_Files
     
    MR328 | ZapFREE® MRI Safe Incremental Rotary Encoder, 360ppr resolution
    MR328 MRI Safe Sensor is a non-metallic version of the MR322 Sensor - developed specifically for applications requiring electromagnetic and RF transparency:
  • MRI facilities
  • EMC test labs
  • Anechoic chambers
  • Industrial applications operating under extreme electromagnetic fields
  • Downloads: datasheet | manual | drawing | image | CAD_Files
     

     

     

     

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