The top will output 24 full, blue belts to one side (with the help of bots). To see how, watch https://wiki.factorio.com/images/RoboTrainStation.gif
The bottom will output 12 full, blue belts, one for each splitter (if you prefer to not use bots).
The requester chests in the top blueprint will automatically request whatever item is dumped in the provider chests (because of the red wire).
I think the minimum number of bots for the top blueprint is 300 for each station.
I modified this https://wiki.factorio.com/index.php?title=File:RoboTrainStation.gif
