描述安全仪表系统（Safety Instrumented System, SIS）是工业自动化领域的关键组成部分，用于监测和控制高风险工艺过程，确保安全生产。本文将深入探讨SIS系统设计的基本原则、架构选择、功能安全标准（如IEC 61508/IEC 61511）的应用，以及实际工程中的最佳实践，帮助读者全面理解SIS系统的核心要素。1. SIS系统设计概述1.1 什么是SIS系统？安全仪表系统（SIS）是一种专门设计用于检测危险工况并执行安全措施的自动化控制系统。其主要目标是在工艺过

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