44 Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
Chapter 2 Design an Enhanced Redundancy System
I/O Placement
In an enhanced redundancy system, you can place I/O modules in these
locations:
• Same ControlNet network as redundant controllers and communication
modules
• Same EtherNet/IP network as redundant controllers and communication
modules
• DeviceNet network connected via a bridge
• Universal Remote I/O network connected via a bridge
1715 Redundant I/O Systems
Beginning with the enhanced redundancy system, revision 19.052 or later, you
can connect to 1715 Redundant I/O systems over an EtherNet/IP network.
The 1715 Redundant I/O system lets a controller communicate to a remote,
redundant I/O chassis over an EtherNet/IP network. The 1715 Redundant I/O
system provides high availability and redundancy for critical processes by using a
redundant adapter pair and multiple I/O modules that have diagnostics and are
easily replaceable.
The 1715 Redundant I/O system consists of a single, two-slot, adapter base unit
that houses a redundant adapter module pair. The adapter base unit is connected
to up to 8, three-slot, I/O base units, that can hold up to 24 fully-configurable
digital and analog I/O modules. You can configure a 1715 Redundant I/O
system in a Ring or Star topology.
Each 1715 Redundant I/O system uses a single IP address as the primary IP
address for all communication. The redundant adapter module pair consists of
two active modules, a primary adapter module and its partner, a secondary
module.
You cannot install I/O modules in the redundant chassis pair. You can only
install I/O modules in remote locations accessed over the networks in this list.
You can connect to remote I/O modules over an EtherNet/IP network in an
enhanced redundancy system, revision 19.052 or later.
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