Introduction to Fieldbus The Fieldbus Jungle Fieldbus Can Be Good. Fieldbus Can Be Bad. An Experienced Integrator Examines the Benefits Claimed and Their Relationship to Industrial Reality. (P. Hunter Vegas in ControlDesign 7 Feb 2011) Moore Industries's useful Introduction to Fieldbus says "Fieldbus is simple. So simple, you'll wonder what all the fuss is all about. In this article, we'll stick to the two basic fieldbuses used in process control: PROFIBUS PA and FOUNDATION fieldbus™ H1. We'll cover how fieldbus works, show how to connect instruments, and explain why - in most cases - you can't connect all 32 instruments on a single fieldbus segment as all the advertising claims." IndustrialNetworking.net E-News - newsletter from Industrial Networking magazine. Free, Downloadable White Paper: "Introduction to Fieldbus" - The non-commercial "Introduction to Fieldbus" white paper, downloadable from Moore Industries, explains, in terms any engineer, technician or operator can understand, how fieldbus works. It strips away all the jargon and confusing terminology. Does your firm purchase or plan to purchase the following types of wireline or wireless Ethernet infrastructure components or network software for industrial operation/facility use?: Networking Components/Access Points-bridges, console servers, device servers, distributed/remote I/O, gateways, hubs, fiber optic transceivers, modems, multiplexers, receivers, repeaters, switches, transceivers, or transmitters Interconnect Products-connectors, cable & cord sets, distribution boxes, or terminal blocks Network Software-analysis or management Antennas for Wireless Access Points/Network Components If you specify or will specify any of these, Venture Development Corporation (VDC) would like to ask you some questions about the applications. VDC, an independent market research firm, is conducting a study for leading suppliers of these products. They want to understand your problems, expectations, and future purchase plans. Please click on HERE to answer on-line questions, or write to Jim Taylorto request an electronic or hard copy of the questionnaire. Respondents will receive a White Paper summary on the findings, and will be entered into a drawing for 1 of 5 Sportrak GPS Receivers, or $100 Amazon.com gift certificates to be awarded. Help the suppliers of these products to better serve your needs. Don't miss this opportunity to convey your opinions and expectations. Your response will play a significant role in determining future products and services. Fieldbuses for Process Control: Engineering, Operation, and Maintenance by Jonas Berge (2002) Based on experience collected from end-users in a wide range of industries around the world, this book provides "how-to" information for all phases of the system lifecycle from engineering to device and strategy configuration, installation, commissioning, troubleshooting, operation, and maintenance. The book covers the three leading process fieldbus technologies: HART, FOUNDATION™ Fieldbus and PROFIBUS-PA. It covers both the field-level and the Ethernet-based host-level networking. Some Explanations See also our Acronyms Page How fieldbus works! - - an easy to read background note from Moore Industries Ring, star, trunk and drop, and daisy chain Bus refers to a concept for cabling devices together, part of a family of connection topologies that also includes the ring and star. The bus topology uses a main trunk cable that connects all devices linearly. the devices connect to the trunk using drop lines, the bus is called trunk and drop, such as thick Ethernet, Modbus+, AB+, ControlNet, and Proxox DH-II. If the devices connect directly onto the trunk with no drop lines, the bus is a daisy chain, such as thin Ethernet, Genius I/O, and ProfiBus-DP. Some buses, such as DeviceNet and Foundation fieldbus H1, can be either. Ethernet: Thick, thin, or UTP? Thick Ethernet (10Base-5) was the original IEEE 802.3 Ethernet standard. It is called thick or thicknet because its cable consisted of RG-8U coaxial cable similar to that used for cable TV. Thin Ethernet (10Base-2) was the second IEEE Ethernet standard. It is often called thin or thinnet because it used the thinner RG-58 A/U coaxial cable at the same data rate. 10Base-T Ethernet, the most common form today, uses unshielded twisted-pair, or UTP, cable in a star topology. What's the difference? The terms interoperability and interchangeability are not interchangeable. If two devices can use the same language to talk to a third device, that means they are interoperable with the third device. But if the second device has more bells and whistles than the first, they cannot be interchangeable. It's like two remote controls that are used on the same TV. They can both talk to the TV, but one has only channel changing and volume capabilities. The other has those capabilities, plus video controls and closed-caption controls. The two remotes are interoperable but not interchangeable.

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