DCS安全性:为保证DCS控制的设备的安全可靠,DCS采用了双冗余的控制单元,当重要控制单元出现故障时,都会有相关的冗余单元实时无扰的切换为工作单元,保证整个系统的安全可靠。PLC所搭接的系统基本没有冗余的概念,就更谈不上冗余控制策略。特别是当其某个PLC单元发生故障时,不得不将整个系统停下来,才能进行更换维护并需重新编程。所以DCS系统要比其安全可靠性上高一个等级。
西屋《5X00300G01》《5X00106G01》《5X00121G01》,
ABB《SNAT 7261》《CI830》《DSQC639》《07KT98》,
艾默生 《KJ2231X1-EA1》《KJ3221X1-BA1》《KJ3204X1-BA1》《VE4002S1T2B5 》,
西门子《6DD1607-0CA1》《39SDM024DCCBN》《6ES5948-3UR23》《TI 435-CPU》现货多多,只要不亏本,价格请致电详谈1/3/3/9/4/0/5/7/2/9/2/


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