In the hardware world, a multi-pole rotary switch has one position for all poles: all poles are in position 1, or all poles are in position 2, etc. So in the software world, if you look at your inputs as a 1D array, the outputs could be a 2D array with the rotary switch position determining the column index for all outputs. You could choose to make the unconnected outputs (columns) a fixed value like 0 or NaN (not a number). If you use NaN for your unconnected outputs, any downstream function or VI looking at the outputs could easily test if the output was connected by using the Not a Number/Path/RefNum function from the Comparison palette. See the attached LabView 6.1 example (using Dennis's cool rotary switch).