Fieldbus Intrinsically Safe Concept
Fieldbus Intrinsically Safe Concept (English for:. Intrinsically safe field bus ), short FISCO , is an intrinsically safe fieldbus system for hazardous areas. It is specified in the standard DIN EN 60079-27 (VDE 0170-27): 2008-12 .
The concept was jointly developed in the mid-1990s by the Physikalisch Technische Bundesanstalt , the ABB company and the chemical industry and the Profibus organization. The Fieldbus Foundation has also been involved in the concept since 2001 .
The use of fieldbus devices exclusively certified according to FISCO ensures the intrinsic safety of the entire fieldbus system. This saves the time-consuming testing of the intrinsic safety of the overall system. The intrinsic safety of the fieldbus components is ensured by the following measures:
- There is only one power supply per network element
- The cable lengths and types are precisely specified
- No energy feed into the network when a station is transmitting
- Each end device consumes at least a certain amount of electricity
As a result of these measures, only a limited current flows on the bus lines in a circuit, so that no ignitable sparks can arise in the event of a malfunction or when a circuit is opened.
See also
Web links
- Article: The intrinsically safe fieldbus has arrived on chemicalprocessing.com (English)
Individual evidence
- ↑ Description "What is FISCO?" ( Memento of the original from August 12, 2007 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. on abb.de
