Do you have a manual? Have you read it?
Since you did not provide a link for the "LCUS-1 type USB relay module" I did a quick google search. According to a user on Amazon, it is a simple serial port. Take a look at the "Continuous Serial Write and Read.vi" in the examples to get you started
<C:\Program Files (x86)\National Instruments\LabVIEW 20XX\examples\Instrument IO\Serial\>
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Certified LabVIEW Developer (CLD)
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