Rockwell Automation 1734-AENTR EtherNet/IP Network Configuration User Manual - Manual (Page 55)

Rockwell Automation Publication ENET-UM001L-EN-P - March 2014 55
Control I/O Chapter 5
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 rack-optimized connection conserves connections, but can limit the status
and diagnostic information that is available from the I/O modules.
To optimize the number of available connections, use a rack-optimized
connection between any digital I/O that allows it and the remote adapter that
connects the distributed I/O to the controller via the communication module.
Logix5575 EtherNet/IP ControlNet
OK FORCE SD RUN
RUN REM PROG
1 2
LNK1 LNK2 OK
10/100 BASE T
EtherNet/IP
1 2
LNK1 LNK2 OK
10/100 BASE T
EtherNet/IP
1 2
LNK1 LNK2 OK
10/100 BASE T DC OUTPUT ST
AT
ST
AT
Diagnostic
DC OUTPUT ST
AT
ST
AT
Diagnostic
DC OUTPUT ST
AT
ST
AT
Diagnostic
EtherNet/IP Network
Controller with EtherNet/IP
Communication Module
EtherNet/IP Adapters with I/
O Modules
Two Digital I/O Modules Three Analog I/O Modules Four Digital I/O
Modules
Switch
Example - System Connections
System Connections Amount
Controller to local EtherNet/IP communication module 0
Controller to EtherNet/IP adapter with digital modules
(rack-optimized connection to each adapter)
2
Controller to EtherNet/IP adapter with analog modules
(direct connection for each analog I/O module)
3
Total connections used 5