Schneider Distributed I/O selection for 20Km distance

[leofarhan]

Hello!

We need to use 33-distributed I/Os scatered in the field having cable length of 20Km (Approx) from first to last drop.
The solution must be based on Schneider-Electric equipment with some third party products.
Cost effective solution is require based on redundant connecting media.

I am thinking to use Quantum on upstream and Advantys I/Os on ModBus Tcp/IP via fiber optic ring, Is there anyothr better solution?

Regards

Leo-Ali