Introduction

This topic discusses some of the more common DIO and RIO network topologies that use typical system components.

DIO Daisy Chain and DIO Daisy Chain Loop

BMENOS0300 network option switch modules support distributed equipment as shown:

1 A BMENOC0321 module on the local rack provides transparency between the device network and the control network.

2 A BMENOS0300 module on the local rack is connected to a DIO daisy chain.

3 The same BMENOS0300 module on the local rack is connected to a DIO daisy chain loop.

4 A BMENOS0300 module on an (e)X80 drop is connected to a DIO sub-ring.

DIO Daisy Chain and DIO Clouds

BMENOS0300 network option switch modules support distributed equipment as shown:

1 A BMENOC0321 module on the local rack provides transparency between the device network and the control network.

2 The BMENOS0300 module on the local rack is connected to a DIO daisy chain.

3 The same BMENOS0300 module on the local rack is connected to two DIO clouds.

DIO Daisy Chain and DIO Multiple Daisy Chain Loops

A BMENOS0300 network option switch module on a local rack supports a DIO daisy chain and a DIO daisy chain loop. A different BMENOS0300 module on the same rack supports another DIO daisy chain loop:

1 A BMENOC0321 module on the local rack provides transparency between the device network and the control network.

2 The BMENOS0300 module on the local rack is connected to a DIO daisy chain.

3 The same BMENOS0300 module on the local rack is connected to a DIO daisy chain loop.

4 Another BMENOS0300 module on the local rack is connected to another DIO daisy chain loop.

NOTE: This architecture applies only to Modicon M580 standalone systems. It is not supported in Hot Standby systems.