The question is: what is sil certification and how to do it?

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SIL is a concept of "functional safety" level introduced for plant safety. "Functional safety" of equipment aims to prevent and deal with risks caused by failure of control systems or instruments, or misoperation by personnel. These risks include harm to human health, pollution to the environment, and damage to instruments. In order to meet the requirements of "functional safety", the occurrence of random faults must be controlled, and the occurrence of system faults must be eliminated and controlled; and when a fault occurs, the entire system must be in a safe environment, or before switching to a safe state. , "Functional safety" is mainly realized through the user's "proven-in-use". This evaluation project is mainly aimed at a single product or component. The purpose of this evaluation is to pass analysis, inspection, testing and on-site audit, etc. method to prove whether the product has the corresponding SIL applicability (including SIL1/2/3/4).

SIL certification is a standard cluster formed based on functional safety standards such as IEC 61508, IEC 61511, IEC 61513, IEC 13849-1, IEC 62061, IEC 61800-5-2, etc., which evaluates the safety integrity of safety-related equipment. A third-party assessment that evaluates performance levels (SIL) or performance levels (PL). SIL assessment mainly involves the project management (FSM) of the safety equipment development process, the safety and reliability of the development process, hardware/software, and includes the assessment of basic safety characteristics (such as environmental adaptability and EMC electromagnetic compatibility).

The evaluation of the safety integrity of a system consists of SIL verification of the functional loops of the safety instrumented system (system level) and SIL evaluation of the instrumentation and control products that constitute the safety instrumented system (product level). Partially composed. Generally, what we often call "SIL assessment" only refers to the SIL assessment of the instrumentation and control products that constitute the safety instrumented system. Safety integrity is divided into 4 levels (SIL1~4), among which SIL4 has the highest requirements.

Generally, this evaluation is based on three parts:

1. Functional safety basic standard - IEC61508 (GB/T20438);

2. Functional safety standards in the industry, such as IEC61511, ISO13849, etc.;

3. Product standards, such as product quality specifications, national/international testing requirements, etc.;

Through these It is required to meet the dual requirements of random hardware failure target control volume and systematic failure control. Therefore, during the evaluation process, the following three aspects of the product design process need to be examined:

1. Technical arguments for product safety integrity (Mechanical, electronic, electrical and software, etc.)

2. Product R&D process management (R&D process, documentation, management procedures, etc.)

3. Product production quality management process

SIL certification is mainly based on standards

1. IEC 61508------Functional safety of electrical/electronic/programmable electronic safety-related systems

2. IEC61511- -----Functional safety requirements for safety instrumented systems in the process industry

3. ISO13849-1------Machine safety. Relevant safety parts of control systems. Part 1: General principles for design

4. IEC62061------Machinery safety. Functional safety of safety-related electrical, electronic and programmable electronic control systems

5. IEC61326-3-2-- ----Electrical equipment for measurement, control and laboratory use. Electromagnetic compatibility (EMC) requirements: safety-related systems and those used to perform safety-related functions (functional safety).

6. ISO26262------Road vehicle system design functional safety

7. IEC61800-5-2:------Adjustable speed electric equipment standard. No. Part 5-2: Functional safety requirements

8. EN50156 -----Measurement and control of digital data communications Part 3 Industrial network functional safety regulations

9. EN50126----- -Railway Applications: Reliability, Availability, Maintainability and Safety (RAMS) Specifications and Description

10. EN50128-----Railway Applications: Software for Railway Control and Protection Systems

11. EN50129-----Railway Application: Safety Related Electronic Systems

Shanghai Shunou has always been an outstanding player in the global market in the field of functional safety. For multiple companies or SIL certificates, no matter what stage the product you need to be certified is currently at, Ootao will establish a product safety life cycle system in the shortest time and implement product changes with minimal investment in manpower and material resources to meet the requirements. requirements of relevant standards. To provide you with one-stop SIL certification services, our functional safety team is composed of senior engineers and experts with different backgrounds and can meet a variety of functional safety needs, such as analog digital circuits, real-time embedded application software, and safety on-site Bus communication, application-specific integrated circuits, reliability and failure rate calculations, etc.

Functional safety services involve many safety-related fields such as petrochemical industry, rail transit, automotive electronics, public facilities, nuclear power instrumentation and control, smart grid, factory automation, etc. The products involved include elevator safety control panels, railway signaling systems, automotive Braking devices, mechanical equipment safety control systems, electronic induction protection devices, safety instrumented systems (SIS), etc.

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