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Chementator: FF granted TÜV approval for SIS specifications

By Chemical Engineering |

Last month, TÜV Anlagantechnik GmbH, Automation, Software and Information Technology (Cologne, Germany) granted protocol-type approval for the Fieldbus Foundation (FF; Austin, Tex.; edlinks.chemengonline.com/5826-541) safety-instrumented-systems (SIS) specifications. The specifications are in compliance with International Electrotechnical Commission (IEC) 61508 standard requirements up to, and including, safety integrity level 3 (SIL 3). The specifications enable manufacturers to build Foundation Fieldbus devices in compliance with IEC 61508. Third party agancies, such as TÜV, will then certify that these devices are suitable for use in SISs. This enables end users to choose devices that meet the requirements of IEC 61511 from multiple suppliers, instead of being restricted to devices designed specifically for a proprietary safety-system platform, says FF. Safety systems are parts of a normal process plant that are used render a process harmless when something goes wrong (CE, May 2005, p. 25). For example, an emergency shutdown system might be composed of a sensor (to detect a problem), a logic analyzer (to decide if the problem warrents a shutdown), and a final element (to close or vent the process unit with a valve). Prior…
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