The primary surface must connect to the built in GigaACE ports.
A FibreACE card in a slot is a different logical set of ports so you can’t connect the primary surface to a card configured in a slot.
To connect the primary surface via fibre you need to use a media converter for the onboard ports and this is the option A&H have given you with switching a card to convert mode.
It’s a useful option to have in an emergency but if you’re planning a system the TP Link converters that Showtime refers to do the same job for a fraction of the price and without chewing up a card slot.
I use the MC220L versions which have the advantage of being able to swap out the SFP+ laser module so you can switch between single mode and multimode should the need arise, again these are a fraction of the price of a FibreACE card even when you take the cost of the modules into account.
The card option is neat if you need to make a GigaACE connection over fibre to a secondary surface or another mixrack but this can also be achieved with media converters and a copper GigaACE card for less money at the expense of a couple of extra small boxes to deal with.
Additionally I think you should be able to connect a dLive GigaACE to other A&H console SLink port over fibre using media converters, I don’t think you can do that with the FibreACE card.
In short the cards are a nice idea but they are just too expensive, there are cheaper ways to achieve everything they do.
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