Issues regarding SIL certification for safety instruments
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As stated in the title, section 8.1.2 of the GBT50770 Safety Instrumentation Design Code requires that \"programmable electronic systems used for logic controllers must obtain functional safety certification from an **authorized body**.\" I just want to ask whether, in addition to certification by TÜV Rheinland in Germany, there are other organizations that issue certifications for safety integrity levels SIL1-SIL4. For control systems such as SIS, ESD, CCS, etc., I haven’t seen any certifications issued by **authoritative organizations. Another question: this specification only requires certification by an authorized authority in the logic controller; does that mean that the actuator and sensing elements do not need such certification?
Actuators and sensing elements are also required.
Shanghai Explosion Protection Station; however, its credibility is not as high as that of TUV
By \"requirements,\" you mean meeting the corresponding SIL usage level, right? So what specific certifications are needed?
At present, few actuators and sensing elements are certified; a small number of certification details can be found in the product manuals of foreign products, while such certifications are very rare for domestic products. Somehow.
I came across it by chance in a magazine: the SILn certification body in China is the Functional Safety Technology R&D Center (FSchina) at the China National Institute of Instrumentation and Control Technology (ITEI). I wonder if it is an authoritative organization?