Optical fibre bushings

57-91..-....

Features

  • Fast, interference free transmission of data in both directions
  • Not affected by electromagnetic interference
  • High transmission reliability
  • High transmission speed
  • Corrosion-free contacts
  • Simple plug-in connection (low installation costs)
  • Reliable signal transmission even over long distances
  • Suitable for use under extreme conditions

Certificates

German English French PTB 99 ATEX 1090 U
English IECEx PTB 13.0030U

Ex protection type

Ex II 2G Ex d IIC Gb
Ex I M2 Ex d I Mb

Ambient temperature

-55 °C up to +80 °C

Description

The optical fibre bushing is used as an optical fibre cable entry into flameproof enclosures located in hazardous areas. They can also be supplied with plug-in connectors.

The optical waveguiders - also known as fibres - are made of glass and resist to mechanical, climatic, chemical and electromagnetic influences. The optical waveguide is most commonly used for carrying signals in the form of electromagnetic waves in the frequency range of visible light.

The type and structure of the cable determines its transmission properties.

Technical data (extract)

(Click here for more information)
StructureNo. of optical waveguides: max. 47 fibres
InstallationThreaded entries for threaded bushings must conform to the minimum requirements of EN 60079-0, section 5.3. These optical fibre line bushings are suitable for installation in electrical flameproof enclosures devices of protection type ?d?, groups IIA, IIB, IIC.
EnergyEx d IIC Gb: max. 35 mW/mm?
Ex d I Mb: max. 150 mW/mm?
ConnectionType and size of thread: M10 x 1 to M42 x 1.5

Documentation

Data Sheet - Optical fibre bushings German English French Russian Spanish 
Customer requirements - Cable entries/line bushings German English French Russian 
Operating Instructions - Optical Waveguides Type 57-91..-.... German English French Russian Spanish Portuguese Italian