s7 400 communicate remote station with profinet

Dear all,

As shown in here with attached block diagram s7 400 plc communicate with remote station through profinet via cp 443-1.The ethernate extender putted to connecte copper link to extend the profinet system. As shown all the stations connected in series with the cpu. If main copper link is breakdown then communication will be failure between plc and remote stations, now we want to establish another hot redundant communication link shown by red colour in block diagram. so, at a time both link will communication with the plc. This type of communication is possible or not. please reply as soon as possible.

Thanks,
Prashant
Cotmac Electronics