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Ring topology PA bus in Ex zone 1?

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Thread Starter

Oscar

Hello every one.

I work as a automation engineer consultant for a company that uses Siemens PCS7 for their automation tasks.

Now I would like to build a PA bus with redundant ring topology in an Ex zone 1 application.
The thing is, that no provider seems to have a solution for this....
Is there anyone out there who have the same problem, or even a solution?

Please, help me out......(!)
 
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