Upgrading the number of outputs a controller has will usually require the purchase of more terminal blocks. These have to be purchased in addition to the upgrade code. Please consider purchasing them from the Digi-Key or Mouser links below. They will have much cheaper shipping for small orders. We sell them as well, but purchasing from us will only make sense if you are also purchasing other hardware.
If you are upgrading DMX channels, or another feature like AutoTalk, then you don't need any additional terminal blocks.