Required and provided interface should be of the compatible types when connected through dependency, that's the oly way they can communicate.
This means that your situation is possible only is IChannel1 and IChannel2 are derived from the IChannelAccess.
UPDATE (after comment)
Interface is a kind of classifier and can therefore be inherited from another one. You can show this situation on a separate diagram.
As your component System expects IChannelAccess, it can safely access any interface derived from it. In this case he cannot call op11(), op12() or op2(), but only op().