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Why are NI Functional Safety Module Variables Read-Only in a CompactRIO Program?

I am using the NI-9350 or NI-9351 Functional Safety Modules. I have programmed the logic within the module and I am currently monitoring the variables from the CompactRIO program. Why am I only able to ...

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000001Dw6MCAS&l=en-US
How Do I Program With the NI-9351 to Ensure that it is SIL 3 Certified?

I am interested in using the NI-9351Functional Safety Module. I notice in the description of the product, that it is capable of SIL 3 certification according to IEC 61508. What is SIL 3 certification and ...

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z0000019UTASA2&l=en-US
How Should I Connect an Emergency Stop to an NI-9350/9351 Functional Safety Module

I have an NI 9350/9351 functional safety module which I need to connect an emergency stop (E-stop) button to, how should I go about doing this whilst maintaining Safety Integration Level (SIL) standards? ...

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000001DdQNSA0&l=en-US

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