You're right. Version 3 and higher have two
wired DMX outs
if you're not using the EX/RX Wireless module. Both V3 and V4 one DMX out (DMX2) if you are.
See the notes on the equipment page
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Loginunder the "Controllers (Dimmers) Comparison Table in the Wiki.
John
[Edit: and the Great Wiki Master beat me to it!]