Rockwell Automation 1794-OB16D FLEX I/O Diagnostic Modules User Manual - Manual (Page 65)

Publication 1794-UM061A-EN-P - July 2006
Configure Your Adapter and Digital Modules on a ControlNet Network 63
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.
The table below calculates the connections in this example.
The rack-optimized connection conserves connections, but can 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 allow
rack-optimized connection, instead of direct connections to those I/O
modules.
ControlNet network
I/O I/O I/O I/O I/O I/O
ControlNet adapter with
digital I/O modules ControlNet adapter with
analog I/O modules ControlNet adapter with
digital I/O modules
controller with ControlNet
communication module or
built-in communication port
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)
0
2
total connections used: 4