A new video by MooreHawke, a division of Moore Industries highlights how its TRUNKSAFE fault-tolerant fieldbus system can avoid costly shutdowns related to faulty Foundation fieldbus or Profibus PA segments.
A shutdown at an oil refinery caused by a faulty fieldbus segment can cost up to $500,000 an hour. Until the introduction of TRUNKSAFE, engineers at oil refineries, natural gas sites and other locations could ensure a fault-tolerant, redundant fieldbus solution only by duplicating each piece of the segment including H1 cards, power conditioners, device couplers and field devices. This process was not only expensive but also demanded special software and complex programming.
MooreHawke’s video shows how TRUNKSAFE uses two physical trunk cable ‘legs’ to ensure no single point of failure will shut down the entire network. Any faulty fieldbus leg is detected, reported and isolated by the system’s power conditioners 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, allowing for normal fieldbus communications to continue while internal blocking circuitry prevents a short-circuit on one leg from affecting the other leg.
TRUNKSAFE’s working is shown in the video using a demonstration panel and animation. The video can be viewed at the Moore Industries Interface Solution Video Library.