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Preventa XU - Which Thesys contactors to associate with a safety light curtain XUSL4E-2E to reach SIL3 or PLe category 4, in a standalone mode?

Please find attached a document explaining
- what is an XUSL4E-2E standalone solution,
- which Thesys contactors to select in such solution,
- which Thesys accessory to use in the contactors to identifiy them when they are used in a safety chain solution.
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