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SIL Certification Level Pre-Assessment Submission Document List
Product User Manual
2. Product Safety Feature List
3. Product Safety Manual
4. Failure Mode and Effects Analysis (FMEDA) Excel File
5. Quality Management System Certificate (ISO 9001)
6. Product Photos (including front and side views of representative models)
7. Product Design Documents (drawings, material reports, calculation sheets, etc.)
8. Additional Information

The significance of obtaining SIL certification for products
1. SIL certification's impact on the product:
We guarantee the accuracy of the product's specific functions.
(2) Enhance the product's acceptance and recognition within the industry.
(3) Certified products offer higher safety, enhancing the product's competitiveness.
(4) Customers typically believe: Certified = Recognized = The.
2. The cumulative impact of SIL certification on the enterprise:
Enhance corporate safety experience and proficiency.
(3) The R&D process of the company is more standardized and verifiable.
(4) Enhanced security measures in place when an injury occurs.
(5) Throughout the certification process, ensure the company's R&D level remains at a high standard.
If a project, system, or product achieves SIL certification, its product quality and safety are recognized and acknowledged. This not only enhances the company's market competitiveness but also greatly strengthens customer confidence in the product. Therefore, if a product significantly impacts life and property safety, obtaining SIL certification is necessary.

What is the failure rate of SIL certification?
During the SIL certification process, a concept we often refer to is the equipment failure rate, which is a core term in SIL certification. It can be said that without determining the failure rate, the SIL certification is incomplete and not comprehensive. So, what exactly is the concept of failure rate?
Firstly, to understand failure rate, we must comprehend what failure means. According to GB/T 20438.4 and also the definition in IEC 61508, failure is "the termination of the ability of a functional unit to perform a required function, or the operation of the functional unit in a non-required manner." A more intuitive understanding would be: normally, y = f(x), but after failure, it becomes y ≠ f(x), where f() represents the predefined function, and y stands for our safety expectations. This also explains why "function" is the same word for both "function" and "function" in English.
This statement might be too formal and not easily understood by the general public. So, let's put it in more colloquial terms, like comparing it to a lighting system. When a lighting system doesn't light up or doesn't light up as required, it's considered to be malfunctioning.
So said, you might know that when a product does not function according to our specified requirements, we can say it's failed. Then, what's the probability of this failure? That's the failure rate.
After understanding what a failure is, we can start categorizing the types of failures. In the concept of functional safety, failures can be divided into two main categories based on their generation cause: systematic failure and random hardware failure. Among them, random hardware failure is the one that can be quantified. The calculation process of PFDavg is based on a probabilistic analysis of random hardware failure.
In the SIL certification process, we analyze the theoretical product model and utilize empirical data from the product's market sales to determine the failure rate, which, when combined with other parts of the SIL certification, forms a comprehensive system to ensure the reliable and secure execution of safety functions.

The standard for SIL (Safety Integrity Level) certification primarily includes:
1. IEC61508—Establishes fundamental safety requirements for both conventional system operation and fault prediction capabilities. These requirements encompass general safety management systems, specific product design, and process design that meets safety requirements, aiming to prevent both systematic design failures and random hardware failures.
2. IEC61511—a functional safety standard specifically for safety instrumented systems in the process industry sector. It is a domain standard introduced by the International Electrotechnical Commission (IEC) following the foundational functional safety standard IEC61508. In China, the harmonized standard for IEC61511 is GB/T 21109.
3. ISO 13849-1—Comprehensive safety assessment from components to systems. This standard also offers designers more quantifiable methods for design implementation.
4. IEC 62061 - Standard in the field of electrical systems.
5. IEC61326-3-2 – Specifies additional requirements for the electromagnetic immunity levels of safety-related equipment, including low-probability-of-occurrence end conditions at the location.
6. ISO 26262 – Primarily focused on specific electrical devices, electronic equipment, and programmable electronic devices in the automotive industry, dedicated to the automotive sector. It aims to enhance the functional safety of automotive electronics and electrical products.
SIL Certification is a third-party assessment, verification, and certification process based on standards such as IEC 61508 (GB/T 20438), IEC 61511 (GB/T 21109), IEC 61513, IEC 13849-1, IEC 62061, and IEC 61800-5-2, evaluating and confirming the Safety Integrity Level (SIL) or Performance Level (PL) of safety equipment. Functional safety certification primarily involves assessments of document management (FSM) for the development process of safety equipment, hardware reliability calculations and evaluations, software evaluations, environmental testing, and EMC electromagnetic compatibility testing. SIL Certification is divided into four levels: SIL1, SIL2, SIL3, and SIL4, covering both product and system levels, with SIL4 being the most stringent.