Offer SIL Certification, SIL Grading, and other consulting services - Shenzhen Zhongnuo Inspection Technology Co., Ltd.
What two aspects does the SIL certification mainly focus on?
The product itself, as well as the conformity of the hardware and software functions of the product to be certified, with respect to the requirements of IEC61508 or more detailed industry-specific functional safety standards, such as hardware failure rates and failure modes.
Another focal point for us is the quality management system utilized during the development process, as well as the qualifications of the R&D staff and the organizational structure, ensuring that the methods and document systems followed throughout the product's development meet relevant standards.
Through these two aspects of examination, we can say that from the entire company to the research and development process and finally to the formation of specific certified products, a complete closed loop has been formed, ensuring that the safety features of the products are reliably and safely realized.

The standard for SIL Safety Integrity Level certification primarily includes:
IEC61508—Establishes basic safety requirements for both normal 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 avoid both systematic design failures and random hardware failures.
2. IEC61511 - A functional safety standard specifically for safety instrumented systems in the process industry, following the international电工委员会's 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 provides designers with more quantifiable methods for design implementation.
4. IEC62061 - Standard in the field of electrical systems.
5. IEC61326-3-2 – Specifies additional requirements for immunity levels of safety-related equipment, including low-probability end-of-site occurrences.
6. ISO 26262 – Primarily focused on specific electrical devices, electronic equipment, and programmable electronic devices in the automotive industry, these are specialized components used exclusively in the automotive field, aiming to enhance the functional safety of automotive electronics and electrical products.

Safety Integrity Level, abbreviated as SIL, is differentiated by the probability of dangerous failure occurring per hour.
There are four SIL ratings specified in the international IEC standards, with SIL 4 indicating a high level of integrity and SIL 1 representing a low level. For each safety integrity level, there are design specifications that can reduce design errors.
The safety level required for the production process is assessed and determined by a specialized process engineering company. Generally, processes with high safety requirements need a safety level of SIL3.

SIL Certification Level Pre-Assessment Submission Document List
Product User Manual
2. Product Safety Feature Checklist
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, calculations, etc.)
8. Additional Information
SIL certification is a third-party assessment, verification, and certification 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, which evaluate and confirm the Safety Integrity Level (SIL) or Performance Level (PL) of safety equipment. Functional safety certification primarily involves the assessment of document management (FSM) for the development process of safety equipment, hardware reliability calculations and assessments, software evaluation, environmental testing, and EMC electromagnetic compatibility testing. SIL certification is divided into four levels: SIL1, SIL2, SIL3, and SIL4, encompassing both product and system levels, with SIL4 being the most stringent.