88 Rockwell Automation Publication 1769-UM011H-EN-P - April 2012
Chapter 6 Place, Configure, and Monitor I/O
I/O Connections
A Logix5000 system uses connections to transmit I/O data.
Configure Distributed I/O
on an EtherNet/IP Network
To communicate with distributed I/O modules over an EtherNet/IP network:
• choose a 1769-L32E or 1769-L35E CompactLogix controller with a built-
in EtherNet/IP communication port.
• add an EtherNet/IP adapter, and I/O modules to the I/O Configuration
folder of the controller.
Within the I/O Configuration folder, organize the modules into a
hierarchy of tree/branch and parent/child.
Figure 12 - EtherNet/IP Distributed I/O Configuration
Table 24 - Logix5000 I/O Connections
Connection Description
Direct A direct connection is a real-time, data-transfer link between the controller and an I/O module. The controller maintains and monitors
the connection between the controller and the I/O module. Any break in the connection, such as a module fault or the removal of a
module while under power, causes the controller to set fault status bits in the data area associated with the module.
Typically, analog I/O modules, diagnostic I/O modules, and specialty modules require direct connections.
Rack-optimized For digital I/O modules, you can select rack-optimized communication. A rack-optimized connection consolidates connection usage
between the controller and all the digital I/O modules on a rack (or DIN rail). Rather than having individual, direct connections for each I/
O module, there is one connection for the entire rack (or DIN rail).
Built-in EtherNet/IP
Port
Device
1. Add the remote adapter for the distributed I/O chassis or DIN rail.
2. Add the distributed I/O modules.
…you build the I/O configuration in this order.
For a typical distributed I/O network…
Controller
I/O
Module
Remote
Adapter
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