HONEYWELL DCS卡件 TC-OAV061 ANALOG OUTPUT MODULE 6 POINT
HONEYWELL DCS卡件 TC-OAV061 ANALOG OUTPUT MODULE 6 POINT
HONEYWELL DCS卡件 TC-OAV061 ANALOG OUTPUT MODULE 6 POINT
SIS：Safety Interlocking System（Safety Instrument Syetem）安全聯鎖系統/安全儀表系統
ESD：Emergency Shutdown System 緊急停車系統
SIS是系統化的概念，更關注整體性的概念，從命名就可以看出來，SIS關注回路，關注系統整體。安全型的現場檢測器件（變送器，儀表，傳感器）---> 安全型 AI---》安全型控制器-安全型的DO---》安全型的現場執行器件（安全關斷閥，泄壓閥，保護器等）。
而ESD 通常是指，安全控制系統廠家生產的，安全型控制器，（CPU），IO，等純控制系統的概念。
從本質上來講，SIS 的硬件系統不光包括，SIS控制器及IO（例如 Triconex，HIMA，西門子400FH）。
還應包括所有跟控制器接口的其他輸入部件，例如獲得TUV SIL認證的傳感器，變送器，檢測裝置；
還應該包括所有輸出部件，如獲得 TUV SIL認證的執行器（液壓安全執行器，氣動安全執行器，電動型安全執行器），
還應該有獲得認證的現場設備。要求嚴格的現場，閥門本體也必須是有TUV 證書的。
例如核電廠的安全閥不光是鍋爐與壓力容器質檢合格，還應該有核檢證書，還應該有 TUV的安規證書，明確標明是SIL幾等級。
ESD是生產廠家的安全性控制器用在不同的場合，根據不同的用途，有著這些不同的叫法，從理論上說，只有ESD，“未必” 會是個完整的SIS控制系統。 ESD僅僅是 SIS中的一環，而且是在實體硬件中，是重要的一環。
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