Strange voltage on Analog outputs (ssr).

You can always design your own board and develop whatever it is you need. If it is indeed the DIY market you are seeking then I believe that stands for

Do It Yourself.....

One wire per each output, 10 outputs. That wiring is going to be ridiculous. (And such design is just retarded to say the least. I have no idea what that board designer was even thinking, probably how to cut $0.50 on production.) For example I have a 110V compressor, spindle water-cooling pump.. 110V also obviously.., etc etc. And now I still need external SSRs of course rendering that board feature completely useless and adding 10 VIN wires for 10 outputs, where board VIN could and should have been used internally., and I will now need many output contacts on my 5VDC supply too, which only has one which is normal. Anyways, I do sound pretty upset lol, which is very accurate description of me now. Thanks a lot for your help and the info provided. Really appreciate you taking time to help!

As a matter of fact I designed plenty of product myself already, some with world records in performance. I am just one man, and I can't do every thing in the world myself, you know? Maybe some of you, talented folks, can grow some self confidence finally and step in? I am elbows deep in commercial projects already and I am not an electronics engineer at this time.

If VIN were common that prevents use for dry contact, mixed sinking and sourcing outputs
and mixed voltage sourcing uses (say if you needed 5V for a step drive enable and 24V
from a VFD to drive a VFD input)

A couple quick points about the product you bought. Since we know your smart and read the description before purchase.

The outputs are isolated Solid State Relays. A quick Google search reveals an SSR is a type of switch not a source of power.

The card does not provide any sort of analog anything much less an output.

Sounds like you didn't bother reading what you were buying and now want to blame that on the developer. The product works fine and is designed for a very wide range of users.

If you want to be upset focus on yourself. Seems you think too highly of yourself to accept responsibility.

Who said that you have to use all existing outputs to hook them up to common, no you don't need to do that. It is sufficient that for example 2-3 out of 10 are powered or 2 out of 5 or whatever, because powered pins are a must on every board, they are absolutely needed while it is absolutely not a big deal to use an external SSR when needed and in fact that is a much better practice because 2A internal ssr rating is not even good for phone charging, pretty useless anyways.

Or just adding a couple of powered ones on top isn't really that big of a deal and is not even any extra cost, and for the heck of it, if it would make a board $5 more expensive than it already is, would it make it a deal breaker for buyers? I doubt it. And by using an external SSR you are getting a way beefier SAFER in this case SSR relay that can be any type you need (DC or AC or whatever C), which I did many times and that did not feel half assed at all, unlike this solution on my mesa board, where you left wondering why the heck there are ZERO powered signal outputs to the extent where you cant even natively connect ENA pins on your driver.

Just by quick estimate I can tell this board costs about $15 (I produced boards before in bulk) or less to manufacture, imagine how much profit there is already and they cant even add a basic feature for $0.50 extra for their consumers. As I said, corporations are all the same.