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Fieldbus Surge Protector
Product Specifications
2
Product Specifications
2.1
Overview and Application
The FieldConnex
®
Surge Protector series TPH-LBF*, TCP-LBF* and SCP-LBF* protect
fieldbus components and control units from damage caused by voltage surges and secondary
lightning strikes. Surge voltages between the fieldbus wire (plus and minus) and between
either wire and ground will be safely limited in an
‘
over-voltage
’
event.
Versions are available where the cable shield is either directly connected to earth or indirectly
through a gas discharge tube. The Surge Protectors are designed for use in fieldbus
communication topologies according to IEC 61158-2. They conform to IEC 60079-11: FISCO
and Entity concepts and are also "DART Intrinsically Safe Compatible" (models without
diagnostics). The Surge Protectors allow the coordinated use in an "EMC-orientated Lightning
Protection Zones Concept", in accordance with IEC 61312-1. The protective effect is adapted
to the EMC interference immunity (conducted high-energy interference impulses) for fieldbus
measuring, control, and equipment.
The TPH-LBF*, TCP-LBF*, and SCP-LBF* series Surge Protectors consist of pluggable units,
designed to fit directly into 3-pin terminals socket of Fuchs fieldbus components
as Power Hubs, Segment Protectors and FieldBarriers, to protect trunk and spur connections
of a fieldbus installation. This leads to a significant reduction in design and installation
time/cost and significantly reduces the overall equipment footprint.
Specific versions of Surge Protectors include a unique diagnostic function for predictive
maintenance of the Surge Protectors themselves. Predictive failures are communicated
through Fuchs advanced physical layer infrastructure to allow the maintenance
engineer to change defected units, before they start to adversely influence fieldbus
communication. The Fuchs advanced physical layer infrastructure is part
of the fieldbus segments itself, thus not requiring a manually scheduled maintenance activity.
Equally, the modular
‘
insertion-connection
’
design allows existing equipment to easily
be upgraded, simply by plugging in a Surge Protector module where the existing cables remain
in the same place connected to the same terminals. This is also ideal for retrospectively fitting
surge protection where required without the need to reroute cables or add any fixings.
The modular approach also allows simple replacement of faulty or failing surge protection
modules with minimal effort and time, without interference to neighboring cables or equipment.
The Spur Surge Protectors fit directly onto an grounding rail (type ACC-LBF-EB.*)
that is positioned under the module so that individual modules can be easily attached
or disconnected without affecting neighboring cables, equipment or modules.
