3BDZ000398R1
HF-KP23
6SE7090-0XX84-0AB0
A06B-0075-B003
聯(lián)系人:王先生
PHONE:18950032873
TEL:0592-5680353
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EMAIL:2224858365@qq.com
ESD緊急停車(chē)系統(tǒng)按照安全獨(dú)立原則要求,獨(dú)立于DCS集散控制系統(tǒng),其安全級(jí)別高于DCS。在正常情
況下,ESD系統(tǒng)是處于靜態(tài)的,不需要人為干預(yù)。作為安全保護(hù)系統(tǒng),凌駕于生產(chǎn)過(guò)程控制之上,實(shí)
時(shí)在線監(jiān)測(cè)裝置的安全性。只有當(dāng)生產(chǎn)裝置出現(xiàn)緊急情況時(shí),不需要經(jīng)過(guò)DCS系統(tǒng),而直接由ESD發(fā)
出保護(hù)聯(lián)鎖信號(hào),對(duì)現(xiàn)場(chǎng)設(shè)備進(jìn)行安全保護(hù),避免危險(xiǎn)擴(kuò)散造成巨大損失。據(jù)有關(guān)資料,當(dāng)人在危
險(xiǎn)時(shí)刻的判斷和操作往往是滯后的、不可靠的,當(dāng)操作人員面臨生命危險(xiǎn)時(shí),要在60s內(nèi)作出反應(yīng),
錯(cuò)誤決策的概率高達(dá)99.9%。因此設(shè)置獨(dú)立于控制系統(tǒng)的安全聯(lián)鎖是十分有必要的,這是作好安全生
產(chǎn)的重要準(zhǔn)則。該動(dòng)則動(dòng),不該動(dòng)則不動(dòng),這是ESD系統(tǒng)的一個(gè)顯著特點(diǎn)。ESD控制系統(tǒng)CPU的掃描周
期一般在幾十毫秒,根據(jù)控制系統(tǒng)所掃描的控制點(diǎn)的數(shù)量,一般在50ms左右,所以ESD的響應(yīng)時(shí)間是
極為迅速的,現(xiàn)在國(guó)內(nèi)比較流行的主流ESD系統(tǒng)為美國(guó)TRICONEX
相關(guān)型號(hào):摩托羅拉 MOTOROLA AB ABB FANUC 西門(mén)子 ??怂共_ 霍尼韋爾 力士樂(lè)
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