Intellabeam DMX channels

Hi,

I just got a couple of Intellabeam 400.
On my Grand MA's profile there are 8 channels, the last one is for the speed. But this speed channel has no effect on the mirror or gobo/color change speed.
On the online manual there is nothing mentionned about the DMX channels.

After searching on Google, some say that there are 8 channels some other 13 channels.

Could somebody tell me what is right. 7, 8 or 13?
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