Intrinsically safe, low-cost transducer bus: how IEEE P1451.6 controller area network communications technology, coupled with low-power bipolar and complementary-metal-oxide semiconductor electronics and CANopen device profiles, can produce an open standard, low-cost, intrinsically safe transducer-bus.(INSIDE PROCESS)

Control Engineering, November, 2005 by Ales, Rick

Over the past few decades, analyzers have evolved into sophisticated chemical sensors and automation instruments that have migrated from the laboratory to the field for integration into real-time process control systems. However, front-end designs of analytical systems--the sample handling and preparation--have not improved appreciably for many years, including the interface for integration.

During a 1999 ISA symposium, a radical rethink of analyzer sample-handling and preparation system designs was conceived as the New Sampling/Sensor Initiative, or NeSSI. A consortium of end-users, suppliers, and academics working under the umbrella of the Center for Process Analytical Chemistry (CPAC) at the University of Washington developed the vision and specifications...

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