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MR342W Draw Wire Linear Incremental Encoder (1-50m)



ZapFREE® Draw Wire FO Incremental Encoder (1-50m)

The MR342W series ZapFree® Fiber Optic Incremental Sensor is an entirely passive, intrinsically safe, fiber optic incremental rotary encoder mounted on a draw wire module – ideal for a wide range of harsh and hazardous environmental linear position applications. The passive, all-optical sensor connects to the remote Controller via a standard duplex 62.5/125 multimode optical fiber link.

The remote MR340 Controller Modules transmit and convert optical signals to/from the sensor. The Controller’s multiple built-in interfaces insure compatibility with industry standard motor drives, PLCs, quadrature counters and motion control systems.

ZapFree    NEC


; Wire: Polyimid-coated stainless steel

Measurement Parameters   
Travel Lengths 1.5m,  3m, 5m, 7.5m, 10m, 15m, 30m, 40m, or 50m
Draw Wire Module Anodized aluminum housing, polyimid-coated stainless steel wire
Optical Interface  
Optical Interface LC Duplex, 62.5/125μm Graded Index Fiber, 0.275NA, Type OM1
Link Length Up to 2000 meters with MR340 Controller
Explosive Atmospheres Inherently Safe, Simple Mechanical Device
EX Classification Inherently safe, simple mechanical device when used with MR340 Controller
IEC Ex EPL Mb/Gb/Gc/Db/Dc
Environmental Attributes  
Temperature/Humidity -40°C to +80°C, 0%-95% RH (non-condensing)
Ingress Protection IP64 (splash proof)
Physical Attributes  
Housing Dimension Ø 58mm x 58mm + Draw Wire Module
Unit Weight 210 g (7.25 oz) + Draw Wire Module
Materials Body: Anodized Aluminum; Shaft and Bearings: Stainless Steel

Specifications subject to change without notice


  • Basic 360 quadrature pulses per revolution or 1440-count per turn resolution based on 4-edge triggering
  • 100% passive sensing design – no electronics whatsoever
  • Sensor can be installed in all manner of hazardous locations and potentially explosive atmospheres – mines, gas and dust
  • Immune to EMI and RFI for safe use in and around medical equipment and “noisy” industrial environments
  • Immune to lightning and high voltages
  • Outdistances copper, link lengths to 2000 meters
  • Temperature range -40°C to +80 °C
  • Compatible with MR340-1 DIN Rail Mount Controller


Call +1-805-389-6600 or email

Ordering Information


360ppr Encoder with IP-LC Interface, where WXXX=Draw Wire Length
Length Options:
W1R5=1.5m W3=3m W5=5m W7R5=7.5m
W10=10m W15=15m W30=40m W40=40m

MR340-1 DIN Rail Mount Controller

Quick Ship Configurations

MR342-D06D00 360ppr Encoder compatible with Micro-Epsilon Draw Wire Modules
MR340-1 DIN Rail Mount Controller

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