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  • Process Control Network Security

    Here, Invensys describes the reference architecture of best practices for a process control system network and its interfaces to a corporate network.

  • A Perspective on Standards

    This whitepaper by Rockwell Automation, explores how companies can gain competitive advantage by increasing their standards and regulations involvement.

    Rockwell Automation
  • Reducing Electrical Noise in Instrument Circuits

    This paper presents the results of tests conducted on ways of reducing the four types of noise encountered in electronic instrument circuits.

    The use of computers and other sensitive electronic equipment in process instrumentation systems has demanded that more attention be give to electrical noise pickup in instrument circuits.

    The superior performance of aluminum-Mylar tape shields in comparison with copper braid and copper served wire shields for static noise rejection is described.

    The effect of twisting wires to cancel magnetic noise is compared to various shielding materials. Twisting the wires is shown to be the most effective practical way of reducing magnetic noise.

    The control of common mode noise by the proper grounding of shields in thermocouple circuits is shown. The use of single grounding points in shield circuits grounded at the couple is recommended. Multipair cables with individual isolated pair shields are recommended.

    Comparative results on cross talk elimination in multipair cables are presented. Individually shielded pairs are recommended as the most practical means of cross talk rejection in instrument circuits.

    Dekoron Division, Samuel Moore & Company. Bruce E. Klipec
  • The Top 10 Worst Performing Alarm Systems in Industry

    Since 1994, PAS has benchmarked hundreds of alarm systems in various industrial markets around the world. From our project databases, this paper presents examples of the worst, most overloaded alarm systems encountered. In addition, the possible solutions to these problems are discussed.

  • Why WirelessHART? The Right Standard at the Right Time

    This paper summarizes key aspects of WirelessHART, including several of the design decisions that make it the right choice for wireless process automation. More detailed information is available at www.hartcomm.org.

    HART Communications
  • Sensitivity in GCMS

    The first and only question a customer has in mind when selecting a GCMS is: “How sensitive is it?”

    Shimadzu Scientific Instruments, Inc.
  • Using MODBUS for Process Control and Automation

    This whitepaper, written by Vince Marchant, a senior application engineer at Moore Industries, describes how Modbus works, and how it can be used in new and legacy process control and automation systems.

    Moore Industries, Vince Marchant
  • Nonlinear Control and Decision Making Using Fuzzy Logic in Logix

    This white paper explores fuzzy logic and how it helps engineers solve nonlinear control problems commonly found in process applications. Fuzzy logic, which mathematically emulates human reasoning, provides an intuitive way to design function blocks for intelligent control systems, advanced fault detection and other complex applications. Control systems deploying fuzzy logic can improve the management of uncertain variables, such as temperature fluctuations.

    Rockwell Automation
  • The Challenge of Maximizing Service Availability and Security

    Nearly every product, service, application and data type is moving to an IP-based infrastructure. As a result, formerly isolated products in homogenous networks are embedded within heterogeneous deployments, resulting in dramatically larger and more complex attack surfaces that are exposed to a wide variety of potential attack sources.

    Mu Security
  • Hazardous Locations A Primer

    This white paper serves to provide some information and guidance regarding area classifications and required approvals for electrical instrumentation.

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