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What does the designation NC or N/C mean on an IO module's wiring diagram?

 NC or N/C designates no connection. This pin is not integral to the modules operation and need not be connected.
The NC or N./C terminals are normally isolated from the module's circuitry. 


*Note: The 800 series family of  I/O is obsolete. Please consider alternatives offered in the Quantum or BMX families of IO .


R-3122018
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