Rockwell Automation Publication ICSTT-RM447M-EN-P - July 2019 93
AADvance Scalability Chapter 5
• The left-hand connector (specified I/O bus 2 in the project tree
configuration), mates with the T9310-02 Backplane Expansion Cable,
which will connect it to another T9300 I/O base unit. I/O Bus 2
supports a maximum of 8 I/O base units and has response lines for a
maximum of 24 I/O modules.
The expansion cable carries module power, command busses and individual
response busses for each I/O module.
Figure 26 - Expansion Cables for I/O Bus 1 & 2
Redundancy and Fault
Tolerance
An important advantage of the AADvance design is the option to add
redundant modules to increase fault tolerance as an when they are required.
Redundant configurations let you replace faulty modules without affecting the
system operation.
This flexibility and operational persistence is made possible by Termination
Assemblies that supply redundant I/O module capacity. By installing a triple
termination assembly you can configure the I/O and use it in a simplex, dual or
triple redundant arrangement.
The AADvance controller, therefore, gives an economical solution for
redundancy and fault tolerance expansion. You can install the termination
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