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Spotlighting fault-tolerant fieldbus system

22 July 2014

MooreHawke, a division of Moore Industries, has released a new video to highlight its TRUNKSAFE fault-tolerant fieldbus system.

The video shows how the system can help avoid shutdowns related to faulty FOUNDATION Fieldbus or PROFIBUS PA segments.
Until the introduction of TRUNKSAFE, the only way for engineers at oil refineries, natural gas sites and other locations to ensure a fault-tolerant, redundant fieldbus solution was said to be to duplicate each piece of the segment, including H1 cards, power conditioners, device couplers and field devices. This is cost-prohibitive and requires special software and complex programming.
The new video from MooreHawke explains how TRUNKSAFE uses two physical trunk cable ‘legs’ to ensure that no single point of failure will shut down an entire network. The system’s power conditioners immediately detect, report and isolate a faulty fieldbus leg while allowing system communications to continue on the healthy leg. 

Simultaneously, the TRUNKSAFE device coupler detects the absence of DC power on the faulty leg and activates its Automatic Segment Terminator. This allows for normal fieldbus communications to continue while internal blocking circuitry prevents a short-circuit on one leg from affect the other leg.

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