Rockwell Automation Publication ENET-UM004B-EN-P - November 2015 51
Chapter 5
Use the Module on a Device-level Ring Network
A device-level ring (DLR) network is a single-fault-tolerant ring network that is
intended for the interconnection of automation devices without the need for
additional switches. The ring topology offers these advantages:
• Media redundancy
• Fast network fault detection and reconfiguration
• Resiliency of a single-fault tolerant network
• Easy implementation without any additional hardware requirements
One DLR network can support as many as 50 nodes. A DLR network supports
copper connections (maximum of 100 m [328 ft]), fiber-optic connections
(maximum of 2 km [1.24 mi]), or a mix of copper and fiber.
IMPORTANT
This chapter summarizes a DLR network.
For information on how to plan, configure, and monitor a DLR network, see the
EtherNet/IP Embedded Switch Technology Application Guide, publication
ENET-AP005.
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