hope this helps..
EDIT (Jan 2016)
A lot of people got confused with "Euro vs. NA" versions. They are the same thing (read the drawings). The only difference is that NA edition has standard pin-out for on-cabinet estop.
Also if you have hardware safety interface (X11 or X11/X13) and later decide to replace them with Ethernet safety (CIP safety or ProfiSafe for example), make sure to unplug X48 from CCU so SION-SIB board(s) are not seen by controller and please put X311 jumper plug on CCU (or connect External Enabling switch, or jumper it)