2002 and 2003 Logic

A

Thread Starter

Andy

What is 2002 & 2003 logic?
and how it is implemented??

under what conditions they are required??

I am working on a project where client requirements are following...

"In order to avoid trips on false indications of limit switch, it is proposed to have 2/2 logic, by including an additional logic to the existing system. Thus the two logics would be "3rd stage discharge pressure trip to be created and set @ 12 barg* initiation of XV-50247 "CLOSE" feedback limit switch...


Can anybody explain what does it says?? and respond the following ..

1- When and why do we use 2002 & 2003 logic?

2- how do we decide to use 2003 is suitable or 2002, under what conditions?

3- explanation of above client requirements..

4- Is this require any SIL study??

A healthy discussion is appreciated..

Regards,
Andy
 
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