ABB AC460 TRIO BLOCKS hw change with S800 I/O

HI All,

I am planning to renew a big installation of TRIO Blocks.
(MOD300 AC460)

They are used for power distribution and the customer
has thousands of meters of fieldbus cable used to connect
power substations all over the power plant.

I wonder if the original Trio bus cable could be used
as AF100 bus in order to change the original trio blocks
with S800 I/O modules.
Any suggestion wil be appreciated.

Regards
PB