In functional safety, safety integrity level (SIL) is defined as the relative level of risk-reduction provided by a safety instrumented function (SIF), i.e. the measurement of the performance required of the SIF. [1]

Determining safety integrity level (SIL) as per IEC 61508-4, definition of SIL rating, and the use of certified SIL rated equipment to meet probability of failure on demand requirements

2023年9月6日 · Safety Integrity Levels (SILs) are a classification system used in functional safety standards to represent the relative level of risk reduction provided by a safety instrumented function (SIF). They indicate the reliability and effectiveness of safety systems in preventing or mitigating hazardous events.

2024年11月12日 · SIS（Safety Instrumented System） 是一个为工业过程提供保护的仪表系统。 它通过传感器、逻辑控制器和执行器等模块，确保在出现紧急情况时，系统能自动进入安全状 …

Low integrity safety functions with required risk reduction factor RRF < 10 need not be implemented in the safety system. The definition of target SIL for safety functions (SIFs) is an important step in the Safety Life Cycle as per IEC 61511.

2024年11月24日 · SILa（SIL Capability） 是对设备或系统在特定环境下达到预期SIL等级的实际能力的衡量。 SILa不仅仅考量设备的设计，还包括实际操作、维护频率、测试方案等因素。 通过评估SILa，企业可以验证系统在日常运行中是否具备足够的安全能力，是否达到指定的SIL等级。 SILa的有效性依赖于持续的管理和维护。 即使设备设计符合SIL要求，如果缺乏足够的维护和测试，SILa水平可能会下降。 因此，评估SILa并采取适当的维护措施对于确保系统长期可靠性至 …

2024年8月7日 · SIL is a measure of the reliability and effectiveness of a safety system, expressed in terms of the probability of failure on demand. There are four SIL levels—SIL 1 to SIL 4—with SIL 4 representing the highest level of safety integrity and the lowest probability of failure.

2024年1月15日 · Safety Integrity Level (SIL) is a discrete level (out of a possible four) used to define the integrity of a specific Safety Instrumented Function (SIF) allocated to an Electric/Electronic/Programmable Electronic (E/E/PE) safety-related system. The higher the SIL, the higher the integrity of the safety function and vice versa.

SIL is a measure of the level of risk reduction provided by a safety function, or the reliability of a safety system. It is used to quantify the performance required for a Safety Instrumented Function (SIF) to maintain acceptable levels of risk. Risk Reduction Factor (RRF): SIL indicates the required reduction in risk.

demonstration that for each SIF, the target SIL, as derived from SIL determination, has been met in accordance with the requirements of of IEC 61508 / IEC 61511. As part of SIL verification for a SIF, the SIL calculation aspects of this process is dependent on the following parameters: - Architectural constraint, in terms of: Safe