MR340 Rotary and Linear Incremental Encoder Series

MR344 Hollow Shaft Encoder
August 29, 2018
Micronor's Electromechanical Products
Micronor Electro Mechanical
September 13, 2016

MR340 Rotary and Linear Incremental Encoder Series

MR340 Series Fiber Optic Incremental Encoder System

MR340 Series

Fiber Optic Incremental Encoders

Fiber Optic Incremental Encoders are typically used to sense the motion and speed of a motor shaft or linear actuator where conventional electronic-based encoders and resolvers are inadequate. Typically the user’s control system is looking for A/B quadrature signals for which electro-magnetic interference and noise causes system errors.

Micronor Fiber Optic Incremental Encoders are based on an all-optical passive sensor design which optically connects to a remote controller via a standard duplex OM1 62.5/125 multimode fiber optic link spanning distances up to 2000 meters. The Controllers offer much more interface capability besides A/B quadrature outputs. The additional built-in analog (4-20mA, ±10V) and digital interfaces (RS485, USB, Modbus RTU) can also be user-programmed to output speed or position status.

ZapFree   MR 

Product line:

  • MR340 series is Micronor’s 3rd Generation Fiber Optical Incremental Encoders – comprising both rotary and linear models. The new series provides a lower cost, intermountable replacement for the MR320 series while adding a small form factor rotary and linear option. Resolution is available up to 1024ppr or 100μm.
  • Special non-metallic, all-dielectric rotary and linear encoders for medical MRI and high voltage environments – MR343 Linear and MR348 Rotary.
  • The MR340 series should be used in all new applications in lieu of the MR302/MR303/MR304/MR310/MR320 series Incremental Encoders.

Legacy Product Information, MR30X / MR31X / MR32X Series

Micronor Fiber Optic Incremental Encoders provide interference free feedback in challenging environments and applications as diverse as medical devices to welding robots, and steel mills to mines. 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:

MR341 Size 11 Rotary Sensor

MR341 Size 11 Rotary Sensor

The MR341 Mini Rotary Encoder is a Size 11, small form factor incremental encoder offering resolution to 512ppr. It is intermountable with resolvers, synchros and conventional electronic-based encoders of the same size.

View Product
MR342 Rotary Sensor

MR342 Rotary Sensor


MR342 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. Like all of Micronor’s Fiber Optic Encoders, the MR342 is a passive sensor which is immune to EMI and is ATEX classified as a “simple apparatus” for use in all manner of hazardous locations and explosive environments.

View Product
MR348 MRI Safe Rotary Sensor

MR348 MRI Safe Rotary Sensor

MR348 MRI Safe Sensor is a non-metallic version of the MR342 Sensor – developed specifically for applications requiring electromagnetic and RF transparency:

  • MRI facilities
  • EMC test labs
  • Anechoic chambers
  • Industrial applications operating under extreme electromagnetic fields

View Product
MR346 Size 90mm Rotary Sensor

MR346 Size 90mm Rotary Sensor

MR346 series is a heavy duty size 90mm shaft sensor for heavy equipment applications with high bearing loads and requiring robust shaft seals. Features include:

  • IP66 ingress rating (resistant to powerful water jets)
  • Resolution options: 256 and 360 ppr
  • Optical link can extend up to 2000 meters
  • Standard (-40°C/+80°C) or Extended (-60°C/+125°C) Temperature option

View Product
ZAPPY340 Configuration Software

ZAPPY340 Configuration Software

ZAPPY®340 software is distributed with every MR340 Controller and is designed to provide the user with a simple but powerful system configuration and diagnostics tool for the MR340 series Fiber Optic Incremental Encoder System. Initially, the program is used to pre-program MR340 Controller’s internal parameters associated with various auxiliary functions, such as the mode and scale of the analog output. It is also used to verify system operation during installation, run diagnostics and facilitate system troubleshooting.
View Product
MR343 MRI Safe Linear Sensor

MR343 MRI Safe Linear Sensor

MR343 Linear Incremental Encoder is an innovative, all optical, non-metallic solution for MRI applications due to both its immunity and invisibility to magnetic fields. The sensor provides 0.1mm positional resolution. With a MR340 Controller, the encoder’s optical link can extend up to 1600 meters.

View Product
MR344 High Resolution Hollow Shaft Sensor

MR344 High Resolution Hollow Shaft Sensor

MR344 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. The MR344 is a totally passive sensor, immune to EMI and can transmit interference-free over distances up to 2500 meters. An Extended Temperature Option offers -60°C to +125°C operation.

View Product
MR345 High Resolution Rotary Sensor

MR345 High Resolution Rotary Sensor

MR345 Series High Resolution (1024ppr) Incremental Solid Shaft Encoder is ideal for closed-loop feedback of variable frequency drives (VFD) and other high horsepower motor drives operating in challenging environments – where a shafted encoder is required.

View Product
MR340-1 DIN Controller

MR340-1 DIN Controller

The MR340-1 DIN Rail Mount Controller works with any of the MR340 series Fiber Optic Incremental Encoders – rotary or linear. The sensor is connected to the controller via an industry-standard 62.5/125μm duplex multimode fiber optic link. The controller keeps track of position and also calculates the RPM or linear speed of the connected encoder. Both position and speed can be read via built-in SSI, Modbus/RS485, USB or Analog Interface. The analog output can be configured for either ± 10V or 4-20mA output.

View Product
MR340-0 OEM Controller

MR340-0 OEM Controller

The MR340-0 OEM PCB Controller enables Original Equipment Manufacturers (OEMs) to compactly and cost effectively integrate MR340 series Fiber Optic Incremental Encoders within their equipment designs.

View Product