6ES7313-5BF03-0AB0
IC670ALG230
CP-20A-33-J604A-SP
RLM01
3BDZ000398R1
聯(lián)系人:王先生
PHONE:18950032873
TEL:0592-5680353
FAX:0592-5680772
QQ:2224858365
EMAIL:2224858365@qq.com
ESD緊急停車系統(tǒng)按照安全獨立原則要求,獨立于DCS集散控制系統(tǒng),其安全級別高于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)過程控制之上,實
時在線監(jiān)測裝置的安全性。只有當(dāng)生產(chǎn)裝置出現(xiàn)緊急情況時,不需要經(jīng)過DCS系統(tǒng),而直接由ESD發(fā)
出保護(hù)聯(lián)鎖信號,對現(xiàn)場設(shè)備進(jìn)行安全保護(hù),避免危險擴(kuò)散造成巨大損失。據(jù)有關(guān)資料,當(dāng)人在危
險時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時,要在60s內(nèi)作出反應(yīng),
錯誤決策的概率高達(dá)99.9%。因此設(shè)置獨立于控制系統(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。該動則動,不該動則不動,這是ESD系統(tǒng)的一個顯著特點。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)所掃描的控制點的數(shù)量,一般在50ms左右,所以ESD的響應(yīng)時間是
極為迅速的,現(xiàn)在國內(nèi)比較流行的主流ESD系統(tǒng)為美國TRICONEX
相關(guān)型號:摩托羅拉 MOTOROLA AB ABB FANUC 西門子 ??怂共_ 霍尼韋爾 力士樂
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