Rockwell Automation Publication 442G-UM002B-EN-P - August 2021 15
Chapter 1 Product Overview
Linear Topology
The linear topology uses the embedded switching capability to form a
daisy-chain style network that has a beginning and an end. Linear topology
simplifies installation and reduces wiring and installation costs, but a break in
the network disconnects all modules downstream from the break. When this
topology is used, both Ethernet connections on the access box may be used. For
the network connection, use Link 1, Link 2, or both.
Figure 11 - Example of Linear Topology
IMPORTANT
Modules without dual ports must include the 1783-ETAP module or be
connected at the end of the line.
ATTENTION: The access box does not currently support time-sensitive
applications that are based on CIP Sync, including CIP Motion applications. Do
not use the access box in DLR topologies where other nodes are using CIP
Sync or CIP Motion. To be used in linear topologies, where other nodes are
using CIP Sync or CIP Motion, the access box must be connected at the end of
the line.
LNK1LNK2 NET OK
EtherNet/IP
1
2
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