Figure 15. Line Topology
Networking
Node
Node
Node
Host
Advantages:
•
Simple and inexpensive installation, expansion, and troubleshooting
•
Ideal for low number of nodes. NI recommends a maximum of 15 nodes.
•
No external switch needed
•
Can cover long distances
Disadvantages:
•
Any unpowered nodes and/or node failure disrupts network communication
•
Addition or removal of any node disrupts network communication
•
Failure of any Ethernet cable and/or improper cable termination disrupts network
communication
•
Network performance and synchronization affected when node count exceeds 15.
Consider the
Star Topology
for systems that require a greater number of nodes.
Note
For information about daisy-chaining power, refer to
Power Connectors and
Wiring
.
Ring Topology
In a ring topology, the host communicates with all nodes through the most effective path. You
must use an external switch in a ring topology. You must configure the network properly with
a recommended external switch before creating redundant links in the network. Refer to
External Switch Requirements
for information about what to look for in an external switch.
Figure 16. Ring Topology
Node
Node
Node
Networking
Host
External
Switch
Advantages:
•
Failure of any single Ethernet cable does not disrupt network communication
•
Additional nodes or heavier network traffic affects network performance less than the line
topology
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FD-11613 User Guide