I would definitely encourage you to learn about the safety standards and requirements in your country.
I think the standards that Performance Levels come from were designed to line up with the requirements of the EU. A brief googling suggests that Sweden is semi-aligned with the European Union, so I don't know if you've adopted their safety requirements, or have your own.
I know for a fact that America has (at best) fuzzy safety standards that basically boil down to "don't let people get hurt". Where there are specific rules, most people haven't updated from how they did things in the 70's and 80's. Not a knock on my American colleagues, but take anything specific we say about safety with a big grain of salt. Put 4 random American controls engineers in a room, and you'll probably get 6 different ideas about what is the absolutely only correct way to do the safety on a machine.
Our standards is basicly directly translated from 60204-1, 13849-1 and 13850. I have both 60204-1 and 13849-1 also, but there are always room for discussion and interpretion. As with the topic I have started here