What are the differences in the specifications for ESD and SIS systems?
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What are the differences in the specifications for ESD and SIS systems? For example, SIS systems must have SIL certification, while ESD systems are available without such certification. Does that mean ESD systems do not require SIL certification? If no certification is needed, then what kind of certification is required? Please ask the Haiyou for help! Waiting urgently
ESD and SIS are in a subordinate relationship; that is, SIS includes ESD.
You posted a similar post last time; ESD is just one application aspect of SIS. They must all comply with the international standards IEC61508 and IEC61511; the corresponding domestic standards are GB-T20438 and GB-T21109. All must have SIL certification issued by TUV.
The application areas and main functions of ESD and SIS differ; SIS focuses more on overall safety, whereas ESD serves to handle unexpected situations. It can be said that some of the functions of SIS cover those of ESD. ESD appears earlier than SIS, is relatively simpler, but its execution is more direct. As for the requirements regarding SIL levels, since ESD has existed and developed for over 20 years, while the classification of SIL levels emerged a little later than ESD, it can only be said that there is a complementary or developmental relationship between them.
Everyone has spoken quite thoroughly; SIS encompasses ESD. It can be implemented with reference to relevant SIS standards.
So the standards and specifications for the two are actually the same; the indication function is a subset of it, right?
Are you going to log in to the ESD system? It is recommended to use the SIS system. Current regulations require enterprises with major hazard sources to implement such a system, and the SIS system includes the ESD system as well; the only difference is in price
I want to understand why there is a price difference between ESD and SIS systems, and which systems can be used as ESD systems but not as SIS systems Why is there a price difference? That’s the reason I brought up this topic
This post was last edited by budaoweng123 on 2016-7-21 08:28. So much has been explained above, but it seems like you didn’t pay any attention. Any SIS system that has passed TUV certification can be used in ESD systems. To be more specific, it depends on the SIL level requirements at your site, as some require SIL2 certification. The price differences are caused by variations in manufacturers or product lines, rather than it being the case that something is more expensive just because it’s called SIS and cheaper just because it’s called ESD. For the same project, using the same series of products from the same SIS manufacturer, there being price differences just because the name is Zhang San or Li Si – that’s quite unreliable.
The Safety Instrumented System, also known as a Safety Interlock System, Emergency Shutdown System, Safety Related System, or Safety Shutdown System, is defined by IEC standards IEC 61508 and IEC 61511. It consists of field instruments and logic control units in the control room, and serves to monitor the operation of production facilities, promptly address any abnormalities, and bring the facilities back to a safe state when shutdown is required.
Perhaps I didn’t express myself clearly. I’m aware of the SIL certification for the on-site instruments; there’s no need to worry about that. My question concerns only the system aspect. According to what you said, there is no price difference regarding the system, right?