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Fieldbus Wiring Design and Installation Guide

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The purpose of this guide is to provide information about the Fieldbus* network so that its wiring system can be designed and installed for cost-effective and reliable operation. There are many uses for Fieldbus and many ways it can be configured. It is not possible to give simple rules for wiring a Fieldbus that a robot could follow and get optimum results. For this reason, this guide will first explain how the Fieldbus works so that the wiring system can be designed intelligently to achieve the best performance and the most reliable operation with the lowest cost | Fieldbus Wiring Design and Installation Guide Fieldbus Wiring Design and Installation Guide Fieldbus Wiring Design Installation Guide. 2 Wiring. 4 Signal Termination. 4 Power Conditioning. 5 Signals. 5 Wiring Limitations. 8 Preparing the Wiring System . 19 Wiring Practices. 19 Testing the Operating Network. 20 Fieldbus Wiring Products. 21 Fieldbus Cable . 21 Relcom Fieldbus Connection System . 23 Glossary. 40 RELCOM Inc. 2221 Yew Street Forest Grove OR 97116 USA Tel 503-357-5607 800-382-3765 Fax 503-357-0491 www.relcominc.com E-mail fieldbus@relcominc.com 1 FIELDBUS GUIDE RELCOM INC. Fieldbus Wiring Design and Installation Guide The purpose of this guide is to provide information about the Fieldbus network so that its wiring system can be designed and installed for cost-effective and reliable operation. There are many uses for Fieldbus and many ways it can be configured. It is not possible to give simple rules for wiring a Fieldbus that a robot could follow and get optimum results. For this reason this guide will first explain how the Fieldbus works so that the wiring system can be designed intelligently to achieve the best performance and the most reliable operation with the lowest cost. Fieldbus is a process control network used for interconnecting sensors actuators and control devices to one another. A common type of Fieldbus configuration is shown below A twisted pair cable called the home run connects the control room equipment with a number of devices in the field sensors such as pressure transducers and actuators such as valves. The field devices can be connected to a common terminal block called the chickenfoot or crowsfoot at a field junction box. A terminator T is needed at each end of the Fieldbus cable to allow the twisted pair to carry digital signals. The Fieldbus cable provides power to the attached devices. A power conditioner C is needed to separate a conventional power supply from the Fieldbus wiring. The devices use the shared wiring system to .