High-Capacity Daisy Chain Loop
Connect distributed equipment to a high-capacity daisy chain loop through one of these:
BMENOS0300 network option switch module in an X80 drop
service port of a CPU
service port of a BM•CRA312•0 EIO adapter module
service port of a BMENOC0301/11 communication module
Use those connections to connect distributed equipment to the RIO network:

1 A CPU on the main rack runs the Ethernet I/O communication server service.
2 A BMENOC0301/11 Ethernet communication module (Ethernet backplane connection disabled) manages distributed equipment on the device network.
3 A BMENOC0301/11 Ethernet communication module (Ethernet backplane connection enabled) is connected to a DIO cloud.
4 A BMENOC0321 module on the local rack provides transparency between the device network and the control network.
5 A BMENOS0300 network option switch module is connected to a DIO sub-ring.