RB1200 12v and 24v : What polarity DC on J11?

RB1200 12v and 24v :

What polarity DC?
Can anyone advise the correct procedure for connecting on 12 volt?
What is the amperage?

The manual does not show the polarity nor the amperage to 12v.

12V ; 3A PSU + near J11.

Hello
Sorry I have not expressed myself correctly.

I need feed a RB1200 with 12v. I saw in the manual that is possible using the J11. What I do not saw in the manual is the indication what pin is the positive and what pin is the negative and what the amperage required in this type of connection: direct in J11.

Thankful.

+pin is closer to side of the router. If you look on the back of the router you can see that one pin is with square base (ground) and other is with round (+).

And as sergejs already replied, 12V 3A PSU.

Thank you