Check the input nodes Elapsed Timer, You can find Auto Reset by default it will be true make it false, if you dont want second iteration. you can make relay off in the False case and come out of the loop.
----------------------------------------------------------------------------------------------------------------
Palanivel Thiruvenkadam | பழனிவேல் திருவெங்கடம்
LabVIEW™ Champion |Certified LabVIEW™ Architect |Certified TestStand Developer
Kidlin's Law -If you can write the problem down clearly then the matter is half solved.
-----------------------------------------------------------------------------------------------------------------