IBM Question ~ One TS7700 attached two physical TS3500 library ???

Dear Sir,

Currently I would like to survey mainframe VTL to backup our daily data, but for our internal policy that we have backup data to local and remote site.
If we implemented only one TS7700 VTS , may we attached two physical library (TS3500) and daily backup to different tape library ????

If not,that mean we have to purchase two pair TS7700&TS3500 and put it to different location ?

BR~

Jacky