High Quality Content by WIKIPEDIA articles! Foundation Fieldbus H1 is one of the Foundation Fieldbus protocol versions. It utilises either twisted pair, or fiber media to communicate between multiple nodes (devices) and the controller. The controller requires only one communication point to communicate with up to 32 nodes, this is a drastic improvement over the standard 4-20mA communication method which required a separate communication point for each communication device on the controller system. The Foundation Fieldbus H1 has support for Intrinsically Safe Wiring with 4-6 devices per repeated segment depending on power requirements and other parameters. The original concept was to connect as many as can be in forming a node,but limited by signal strength.

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