you need 2 splitters and 2 cables "ProfiLux-Tunze 2".
Then L2 would be one pump, L4 the other.
Of course the second channel of your EVG-AP would work synchronously to the pump which is connected to L2, but this is not a problem.
If you don't want this you should insert a card with extra 1-10V-interfaces like the PLM-2L4S or PLM-4L.
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