Offer SIL Certification and SIL Grading Consultancy Services – Shenzhen Zhongnuo Testing Technology Co., Ltd.
SIL 2 and SIL 3 certifications are two different levels. According to international certification standards, the SIL 3 level is higher than the SIL 2 level. Specifically, it is characterized by:
An actuator of SIL1 rating should have a failure probability controlled at ≥10-6 to <10-5 during continuous operation per hour.
SIL2 is from ≥10^-7 to <10^-6. SIL3 is from ≥10^-8 to <10^-7.
Of course, the product requirements for SIL3 level are much higher than those for SIL2.
Most products currently meet requirements with SIL 2 or SIL 3 certification levels.

As the public awareness of industrial accidents and their impact on society grows, more and more companies recognize the importance of safety.
In modern process industries, due to the complexity of processes and the multitude of equipment, any failure can have severe consequences for employees, the public, equipment, or the environment.
The SIL certification process is about helping companies fully utilize their good engineering practices and safety technologies (IEC61508 and IEC61511) to prevent industrial accidents from recurring. This is because these experiences and technologies are based on a wealth of actual experience and lessons learned.
With the issuance of the IEC 61508 and IEC 61511 series standards, a systematic functional safety assessment and testing process can effectively address this issue.

SIL Certification Level Pre-Assessment 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 (ISO9001)
6. Product Photos (including front and side views of representative model)
7. Product Design Documents (drawings, material reports, calculations, etc.)
8. Additional Information

The SIL level assessment includes:
1. System Evaluation
-Risk analysis, classification based on risk diagram (ASIL/SIL/PL)
Review of specifications and safety requirements
Concept and Design Analysis
– Verification and Confirmation
2. Software and Tool Evaluation
– Testing of development tools and other communication protocols
Structural Analysis
3. Hardware Assessment
Probability Analysis
Failure Analysis
4. SIL Certification
Components and Systems SIL Certification
- Safety Process SIL Certification
- Granting of system, semiconductor, development tools, and process testing symbols
5. Additional Services
- Risk Applicability and Risk Analysis
- Test and evaluate hardware and software for security during the development process
Concept Evaluation (Initial Inspection)
Function and Safety Management (FSM)
- Security, Reliability, and Availability Analysis
Qualified Assessment Compliant with Relevant Safety Standards
These services are aimed at manufacturers of components, subassemblies, and systems for the automotive industry (including electric vehicles), elevators, power plants, machinery, and process sectors. They support the fulfillment of due diligence obligations and ensure the correct application of the standard, contributing to enhanced safety levels and the reduction of residual risks. Standards such as IEC61508 and others can be integrated into existing quality management systems in a beneficial manner. The implementation of regulations and provisions in the standards provides a reliable basis for decision-making, particularly regarding safety structures, testing procedures, and tools. Development outputs can be verified at an early stage, while also reducing development time and costs. Furthermore, certification enhances the image and raises the company's profile in the competitive market.
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, which evaluate and confirm the Safety Integrity Level (SIL) or Performance Level (PL) of safety equipment. Functional safety certification primarily involves document management (FSM) assessments for the development process of safety equipment, hardware reliability calculations and evaluations, software assessments, 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.