Can Siemens fail-safe PLCs be used in SIS systems?
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Can Siemens fail-safe PLCs be used in SIS systems? Does the software for the SIS system also need to be certified?
It depends on the views of the safety supervision department. The essential meaning of SIS is an interlock device that operates independently of the control system; however, it is increasingly being treated as something sacred. Theoretically, what you say is correct; in many places safety regulations require certification. If certification is necessary, then all components from the control system to each individual gauge must have a SIL certification.
It should be possible; it has TVU certification. It’s either a 300PLC or SIL 3. The safety authorities don’t care which manufacturer’s product you use, as long as it is certified
1. In fact, the current situation in China, along with a series of recent documents issued by the Work Safety Supervision Bureau, has somewhat mythologized SIS. Originally, it was a system designed to ensure the safety of equipment and personnel. In our everyday understanding, leading brands equate SIS with TRICON from the United States and HIMA from Germany, while lower-tier options include Porsafe, TCS900, and similar products. SIS refers to these systems; when talking about SIS, it’s these manufacturers that come to mind. 2. Siemens offers controllers and cards that have been certified for SIL, provided that the system can meet the required standards while ensuring SIF.
We work on small projects; we don’t even have the chance to use SIS.
Relevant SIL certification is required.
In the SIS system, all instrument actuators and controllers must be certified for SIL
No, the SIS system and its instruments must have SIL certification; however, it is acceptable as an independent interlock protection device
There is no mandatory requirement for this, and requirements vary from one park to another. Speaking of the situation in Jiangsu, it is not allowed to use a PLC as a substitute.
Siemens’ safe-type PLCs come with the corresponding certification certificates; they are designed for use in SIS systems
May I ask, if a Siemens Safe-type PLC is used for SIS, how is the software aspect handled? Is SIL certification also required for the online download of SIS system software?