Schneider Electric Processor Adapter - Manual (Page 184)

Using the Modbus Plus Ports
184 870 USE 101 10 V.2
Two Types of Modbus Plus Networks, Continued
What if I Need
Both Types? If your system requires both supervisory and I/O handling architectures, one
solution is to use a Processor Adapter with I/OBus capabilities as the I/O network
and either a 172 PNN 210 22 or 172 PNN 260 22 Option Adapter with Modbus Plus
for the supervisory network.