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Fieldbus SpurGuard™ Short Circuit Protectors


Short Circuit Protection for Fieldbus

A SpurGuard™ is a current-limiting device that provides short circuit protection to the Fieldbus segment. By attaching a SpurGuard™ at each point where a field transmitter attaches to the segment home run cable, the network is isolated from individual device or spur failures.

A red LED indicates when a SpurGuard™ is providing overcurrent protection.

These SpurGuards™ are only used on our Legacy Fieldbus interconnection blocks. The newer Megablock Series are available with built-in SpurGuards™.

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The DXF links in the Drawings column below are mechanical drawings of the product that may be included in your AutoCAD® or equivalent CAD drawings. The remaining table entries are PDF files that may be viewed with
Adobe’s Acrobat Reader.

Part Number Description Data Sheet Installation Instructions Drawing (DXF) Certification Applications
FCS-SG-20 Short circuit protection for a nominal 20 mA transmitter PS-007 500-004 N/A



General Purpose

Class I, Division1, Groups A, B, C, and D; T3

FCS-SG-40 Short circuit protection for a nominal 40 mA transmitter.