Understanding multi-contact relay connection diagram
It's not a simple NO switch, it's a three pole dual throw relay switch. 

As to the double numbering, the not bold numbers are European standard terminal markings where first digit is the pole, second is a contact codes  1 = common, 2 = NC and 4 = NO. The BOLD numbers are everybody else.



If you look at the socket for it, you will see the same markings.



If you WANT to wire it as a simple single pole NO relay, hook up your coil voltage across A &amp; B, and use either pin pairs 4 &amp; 7, 5 &amp; 8 or 6 &amp; 9 as your switch.