Rockwell Automation Publication 1756-UM004C-EN-P - June 2021 7
Chapter 1
ControlLogix EtherNet/IP Network Device
Overview
Overview EtherNet/IP™ networks are communication networks that offer a
comprehensive suite of messages and services for many automation
applications.
This open network standard uses commonly available Ethernet
communication products to support real-time I/O messaging, information
exchange, and general messaging.
ControlLogix Network
Device Features
The ControlLogix® EtherNet/IP network devices:
• Facilitate high-speed data transfer between Logix 5000™ controllers and
remote I/O modules.
• Connect to multiple EtherNet/IP network topologies.
Figure 1
shows how Rockwell Automation EtherNet/IP communication
modules fit into a control system.
Topic Page
Overview 7
ControlLogix Network Device Features 7
EtherNet/IP Network Specifications 9
Electronic Keying 16
Protected Mode 17
Protected Mode in a Redundant Adapter Pair 18
Secure Digital Card 20
CIP Security 22
Parallel Redundancy Protocol 23
Device Level Ring (DLR) 23
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