The ED always puts out 4 universes of signal but you can just ignore it.
If you want Universe 1, then the ED is wired for that purpose. The other three universes are accessible via a Hub or a Combiner/De-Combiner or some sort of splitter.
To use the Conductor for normal DMX, you MUST use an Active Hub. The Conductor only puts out Pixelnet (for now), but you can extract a perfectly good DMX-512 universe with an Active Hub. With enough Active Hubs, you could run a 32 Universe DMX-512.