User manual

Publication ENET-UM001I-EN-P - January 2010 85
Control I/O Chapter 6
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 inform
ation 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.
EtherNet/IP Network
Controller With EtherNet/IP
Communication Module
EtherNet/IP Adapters
With I/O Modules
Digital I/O Modules Analog I/O Modules 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)
2
Total Connections used 4