Lenses can be telecentric on the object side, which gives you the constant magnification and eliminates parallax. Or they can be telecentric on the image side, which for regular photography is usually presented as a way to get the light square on to the sensor. Or they can be telecentric on both sides, like the Xenoplan.
One advantage of a bilateral telecentric for our application is that the images they produce are less sensitive to tilts or misplacements of the object, lens or sensor. This technical brief from Schneider has more details than most will want to know:
The ones that are bilateral are usually specced for a fixed repro ratio and working distance (distance from front lens to object). The good ones *only* work well under these conditions and perform poorly or not at all at other magnifications and distances. For example, a pure bilateral telecentric optic is actually afocal for infinity light - it does not focus it at all, but simply expands or contracts the parallel beam. It's more like a rifle sight than a photographic lens.
So you have to be careful with eBay oddballs (even if they do look supremely cool :-). This Xenoplan lens will surely perform very well on the intended format, but that's quite a bit smaller than FF 35 mm and there is no guaranteed way to make it cover a larger sensor except for turning it round and taking pictures at 3:1 instead of 1:3. There is probably some wiggle room, but you would need to have the actual lens for testing, or a conversation with the Schneider application engineers, to know for sure.