Please add the maximum rating of the inputs. And all the other information from this: https://www.solwise.co.uk/downloads/files/teltonika-rut955-manual-v1-05.pdf page 141 and following. Please remember: the wiki is th official user manual! It's linked from the product page https://teltonika-networks.com/product/rut955/ So, it's embarrassing, that I find the better and more complete user manual on a third party page!
The manual is not third-party, it is an old version that is on this Wiki, right here.
Also, I'm not sure what you're looking for. "Maximum ratings" as you say are one of the first things in the page. Look for them in the Characteristics section.