May 1999

Fieldbus Technology

Intrinsically-safe fieldbus provides chemical plant savings

Similar conventional and fieldbus installations are compared

Krummen, H., Wacker-Chemie

The new, intrinsically-safe PROFIBUS-PA fieldbus system offers savings of 30–50% over conventional wiring techniques. These savings result from reduced hardware and planning costs. They encompass both new installations and maintenance. In 1997, Wacker-Chemie equipped a plant section in their Cologne works with PROFIBUS-PA technology in an EEx Zone 1 environment. Following is our experience with the world's first real EX Zone 1 fieldbus application. User requirements and advantages of the PROFIBUS-PA fieldbus system. A technological leap forward was made when the 4-20 mA live zero signal was introduced which made intrinsically-safe fieldbus technology possible. The

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