Allen-Bradley ControlNet Compact GuardLogix 1769, User Manual, Page: 60 / 100

Chapter 4 Control I/O
Rack-optimized Connections for I/O Modules
In this example, assume that each digital I/O module is configured for a rack-
optimized connection to the controller. Analog modules must be configured for
direct connections.
ControlNet Adapter with
Three Digital I/O Modules
ControlNet Adapter with
Two Analog I/O Modules
ControlNet Adapter with
Two Digital I/O Modules
This table calculates the connections in this example.
Table 12 - Connection Calculations
System Connections Amount
Controller to local ControlNet communication module 0
Controller to ControlNet adapters with digital modules (rack-
optimized connection to each adapter)
2
Controller to ControlNet adapter with analog modules (direct
connection for each analog I/O module)
2
Total connections used 4
The rack-optimized connection limits connections, but can also limit the status
and diagnostic information that is available from the digital I/O modules.
To increase the number of available connections, use a rack-optimized connection
to any remote adapter with multiple digital I/O modules that permit rack-
optimized connections, instead of direct connections to those I/O modules.
60 Rockwell Automation Publication CNET- UM001E-EN-P - June 2016