Rockwell Automation Publication 1791ES-UM001G-EN-P - November 2016 35
About the Modules Chapter 2
Device Level Ring (DLR)
A DLR network is a single-fault-tolerant ring network that is intended for the
interconnection of automation devices without the need for more 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 more hardware requirements
One DLR network can support as many as 50 nodes. A DLR network supports
copper connections (maximum of 100 m), fiber-optic connections (maximum
of 2 km), or a mix of copper and fiber.
Figure 15 - Safety Interlocking and Control Via CIP Safety (DLR topology) Only 1732ES Modules
IMPORTANT This section summarizes a DLR network. To plan, configure, and monitor DLR
networks, see EtherNet/IP Embedded Switch Technology Application Guide,
publication ENET-AP005
.
Only the 1732ES Modules are
compatible with DLR topology
EtherNet/IP Network
RSLogix Software
RSView Software
IMPORTANT Only one DLR ring is supported per active Stratix® 5700 switch.
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