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SIL Certification Level Preliminary 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

The standard for SIL Safety Integrity Level certification primarily includes:
1. IEC61508—sets fundamental safety requirements for both conventional system operation and fault prediction capabilities. These requirements cover general safety management systems, specific product design, and process design that meets safety requirements, aiming to avoid both systematic design faults 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 coordinating standard for IEC61511 is GB/T 21109.
3. ISO 13849-1 – Comprehensive safety assessment from components to the entire system. Additionally, this standard provides designers with more quantifiable methods for design implementation.
4. IEC62061 - Standard in the field of electrical systems.
5. IEC61326-3-2—Additional requirements for immunity levels of safety-related equipment, including low probability end conditions that may occur at the site.
6. ISO 26262 - Primarily focused on specific electrical devices, electronic equipment, and programmable electronic devices in the automotive industry, these components are specially designed for automotive use, aiming to enhance the functional safety of automotive electronics and electrical products.

SIL Functional Safety Certification is applicable to all equipment used for implementing process control safety functions, mainly categorized into electrical components and safety systems.
1. Electrical Components: Actuators, solenoid valves, field sensors, pressure transmitters, temperature transmitters, level transmitters, level switches, programmable controllers, logic solvers, field safety actuators (pneumatic/liquid/eletrical), safety switches, safety valves, cutoff valves, solenoid valves, safety interlocks, etc.
2. Safety Systems: SIS (Safety Instrumented System), ESD (Emergency Shutdown System), Instrument Protection System (IPS), Burner Management System (BMS), F&G (Fire and Gas Protection System), HIPPS (High-Pressure Pipeline Protection System), PSD (Process Shutdown System).
3. Other: Electronic/Electrical/Programmable electronic products with safety requirements.

Safety Integrity Level, abbreviated as SIL, is distinguished by the probability of hazardous failure occurring per hour.
Four SIL levels are specified in the international IEC standards, with SIL 4 indicating a high integrity level and SIL 1 representing a low one. For each safety integrity level, design specifications that can reduce design errors are stipulated.
The safety level required for the production process is assessed and determined by a specialized production technology company. Generally, processes with high safety requirements need a safety level of SIL3.
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 document management (FSM) assessment for the development process of safety equipment, hardware reliability calculation and evaluation, software assessment, 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.