Optical fibre bushings

for use in Zone 1

57-91..-....

Benefits

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

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Marking

ATEX:
Ex II 2G Ex db IIC Gb
Ex I M2 Ex db I Mb

IECEx:
Ex db IIC Gb
Ex db I Mb

Ambient Temperature

Working temperature: -55 °C ≤ Ta ≤ +105 °C (-67 °F ≤ Ta ≤ +221 °F)
depending on the fibre optic cable used
(temperature ranges apply to the fixed installation of leads)

Ambient temperature limit switch:
-55 °C ≤ Ta ≤ +80 °C (-67 °F ≤ Ta ≤ +176 °F) at T6
Depending on the fibre optic conductor selected, the enclosure
heating at the installation site at the max. permissible ambient
temperature must be assumed when calculating the max. temperature.

Certification

ATEX
- DE
- EN
IECEx
- EN
UKEX
- EN
CCC
- ZH
KCS
- KO

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.

Installation	Threaded 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.
Energy	Ex d II: max. 35 mW/ 5 mW/mm² Ex d I: max. 150 mW/ 20 mW/mm²
Connection	max. quantity of the fibre-optic cables: 47 cores Sleeve size: metric M16 x 1.5 to M48 x 1.5 non-threaded: ∅ 22 mm to ∅ 40 mm Sleeve material: Metal, bare, varnished or galvanised