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Comparison of FOUNDATION Fieldbus and Traditional Systems
FOUNDATION Fieldbus (FF) is a Local Area Network (LAN) for process control sensors, actuators, and control devices. It is a digital, two-way, multi-drop network positioned to replace proprietary networks that connect Programmable Logic Controllers (PLCs) of many big companies. In traditional systems, a computer or expensive controller unit provides control for the network of devices.
preview: http://zone.ni.com  

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Fieldbus Tutorial
FIELDBUS is a digital, two-way, multi-drop communication link among intelligent control devices that will replace the 4-20 mA standard in future. First of all, fieldbus is digital. Although computers, programmable logic controllers (PLCs), and remote terminal units (RTUs) communicate with each other digitally, most end devices (e.g. valves, pressure transducers, switches, etc.) still use analog signals to communicate. For example, an...
preview: http://www.pacontrol.com  

tutorial    

Fieldbus Tutorial
The objective of this tutorial is to provide an introduction into fieldbus. - Its time for a change from the 4 - 20mA analogue signal standard which has been used for decades as the method for communications between field devices and a central computer in industry. Fieldbus promises a cheaper, more versatile and efficient system.
preview: http://kernow.curtin.edu.au  

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Foundation Fieldbus Tutorial from Emerson Process Management
FOUNDATION fieldbus offers distinct advantages over traditional analog and discrete wiring - at lower total installed cost and lower ongoing costs. It's not any harder to learn or to use than those traditional technologies - just different. These courses can help you understand those differences, and how to put Foundation fieldbus to work for you.
preview: http://plantweb.emersonprocess.com  

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BITBUS
BITBUS - the original, open and non-proprietary fieldbus!TM Low total cost of ownership Reliable and deterministic Delegates realtime control to the field Exellent distance versus speed performance Supported on many operating systems
preview: http://www.bitbus.org  

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The P-Net Fieldbus
The P-NET Fieldbus is designed to connect distributed process components like process computers, intelligent sensors, actuators, I/O modules, field and central controllers, PLC’s etc., via a common two wire cable, as shown in fig. 1. This replaces traditional wiring, where a great many cables are involved.
preview: http://www.p-net.dk  

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The Read-Out Instrumentation Signpost
One of the most controversial areas in recent years is what has been half jokingly called the Fieldbus Wars. These are some communications protocols pages that we could find. Where available the English Language pages are listed and where this is not available the language is indicated. We have not limited our listings to fieldbus communications but have included other types of platform (eg wireless) as well.
preview: http://read-out.net