To connect a BMENOC0321 control network module to a control network in a Modicon M580 system, Schneider Electric recommends the use of these cables:
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10/100 Mbps: For a communications link less than or equal to 100 Mbps, use CAT5e or CAT6 copper shielded twisted four-pair cables.
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1000 Mbps: For a communications link less than or equal to 1000 Mbps, use only CAT6 copper shielded twisted four-pair cables.
Connections Between Devices
This example shows the maximum cable lengths between RIO and DIO devices in an M580 device network. Use copper cable for distances less than or equal to 100 m. User fiber cable for distances greater than 100 m:
1
BME•58•••• CPU connecting the local rack to the main ring
2
BMENOC0301/BMENOC0311 Ethernet communication module on the local rack managing distributed equipment on the device network
3
BMENOC0321 control network module with IP forwarding service enabled
4
RIO main ring
5
BM•CRA312•0 (e)X80 EIO adapter module on an RIO drop on the main ring
6
BMXNRP020• fiber converter module connecting portions of the RIO main ring greater than 100 m.
7
BMENOS0300 network option switch module connecting a DIO sub-ring to the main ring
8
STB island in a DIO sub-ring connected to the main ring via a BMENOS0300 module on an RIO drop
9
control network 
