Planning an Isolated Distributed I/O Network

Original instructions

Introduction

An isolated distributed I/O network is not part of the remote I/O network. It is an Ethernet-based network containing on a copper wire running from a single port connection. If you use dual-port distributed I/O devices that support , you can connect the devices in a daisy-chain loop to the 2 device network ports (ETH 3 and ETH 4) on the 140NOC78000 distributed I/O head module. There is no interlink to the .

Attaching an Isolated Distributed I/O Network

To attach an isolated distributed I/O network to a Quantum EIO system:

Step	Action
1	Install up to six 140NOC78000 distributed I/O head modules on the local rack, one module for each isolated network desired.
2	Connect the device network port (ETH 4) of each 140NOC78000 module to each distributed I/O network.
3	If you use dual-port devices that support RSTP, then you can connect the devices in a daisy chain loop to both device network ports (ETH 3 and ETH 4) on the 140NOC78000 distributed I/O head module.
4	The 140NOC78000 modules are not connected to any other head module on the local rack.

Example

The following graphic shows multiple isolated distributed I/O networks. The 140NOC78000 distributed I/O head modules are not linked to the 140CRP31200 remote I/O head module on the .

140CRP31200 remote I/O head module

140NOC78000 distributed I/O head modules

distributed I/O clouds, which do not communicate with the Quantum EIO networks

NOTE:

A 140NOC78000 module on the local rack attaches the controller to the isolated distributed I/O network.
A cloud can have a DRSs downloaded predefined configuration and a single connection to the 140NOC78000 module on the local rack and a ring of dual-port distributed I/O devices that support RSTP.

Any Ethernet device (Schneider Electric device, PC, servers, or third-party devices) that supports I/O exchange with a PLC or other Ethernet communication service.

An Ethernet-based network that contains 1 standalone PLC or one Hot Standby system and remote I/O devices. There are 3 types of remote I/O devices: a local rack, a remote I/O drop, and a ConneXium extended dual-ring switch (DRS). Distributed I/O devices may also participate in a remote I/O network via connection to DRSs.

A Quantum rack containing the controller, a power supply, and an Ethernet remote I/O head module. A local rack consists of 1 or 2 racks, the main rack (containing the remote I/O head module) and an optional extended rack. A Quantum Ethernet remote I/O network requires 1 local rack on the main ring.

(dual-ring switch) A ConneXium extended managed switch with one of several possible predefined configurations downloaded to it so that it can participate in an Ethernet I/O network. A DRS provides 2 RSTP-enabled ring connections, one for the main ring and one for a sub-ring. It also manages QoS, which provides a predictable level of performance for both remote I/O and distributed I/O traffic on the same I/O network.

DRSs require a firmware version 6.0 or later.

(rapid spanning tree protocol) A protocol that allows a network design to include spare (redundant) links to provide automatic backup paths if an active link stops working, without the need for loops or manual enabling/disabling of backup links.