March 2008

Special Report: Instruments and Networks

Connecting fieldbus—selecting the system to match the task

Power supplies, cables and connectors are critical to project success

Verhappen, I., MTL Inc.

T?here are a number of different ways to connect field devices to control systems. FOUNDATION fieldbus (FF) is increasingly becoming the technology of choice for connecting control systems to the field. Despite the fact that FF technology has been used for more than 10 years, there are still many questions about how it should be installed. Since FF extends the network into the field, network installation—power supplies, cables and connectors—is critical to the project success. Compounding the challenge of selecting the right combination of these components are the variety of options available and the area classification for which they are to be installed, and of course always at th

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