请教鬼子(外国)工程师得到identical or diverse 的解释? ISA 84.01 里面关于sensor的部分是这样说的。 B 1.5.3 For SIL 3, identical or diverse separation between BPCS and SIS is typically needed to meet the required safety integrity. 请问,identical or diverse 是什么意思? ----------------------------------------------------- 外国工程师给我的解释: Identical means using the same technology for both the BPCS and the SIS. Diverse means using different technologies from the same manufacturer or technologies from two different manufacturers. Separation generally means physical separation, i.e., the same instrument/actuator/logic solver/wiring is not used for both the BPCS and the SIS. Diverse separation helps reduce common failures and systematic faults in addition to reducing random failures. Because the components are the same in identical separation, common or systematic faults may affect the performance of both the BPCS and the SIS. [ ]查看更多7个回答 . 5人已关注