MyDmx 2.0 Outputs.

You would need to pick up a 5 pin to 3 pin adapter pigtail. But I believe you can only have 1 universe output at a time (512) in MyDMX.

Yup --- agree with CMBDJ. Some people have DMX cables with 5-pin connectors and 110 ohm DMX wire. But in the MyDMX 2.0 like most other DMX systems, only 3 of the 5 conductors are used in the 5-pin connector and many DMX light fixtures only use 3 pin XLR type connectors since only 3 conductors are actually required. The MyDMX box is simply providing you with the two connector options depending on what cable/connector combinations you are using. And MyDMX 2.0 only supports one DMX universe output. If you cannot daisy-chain your cable run from fixture to fixture for the entire lighting system and have to use several separate cable runs, then you need to consider adding a DMX signal splitter device somewhere between the MyDMX box and the dividing point for multiple cables.