ABB Advant AC500 - Linear ARCNET, Expanded by Active Distribution Units (Active Hubs)

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V2 AC500 Hardware 1-52 System data AC500 / Issued: 05.2007
Linear ARCNET, expanded by active distribution units (Active Hubs)
Active Hubs amplify the arriving signals. So they stabilize the network configuration and allow especially
for high distances. The Active Hub decouples the station connectors from each other. Therefore, the
entire network does not fail when one of the connections fails.
The maximum length of the network is 6 km.
A maximum of 255 stations can be used.
Active Hub
Station 1 Station 2
T-connector
Terminating resistor
93 Ohms
Total length max. 300 m
max. 600 m
max. 600 m
Station 4 Station 5Station 3
Total length max. 300 m
Active Hub
Station 7 Station 8Station 6
Total length max. 300 m
Station 10 Station 11Station 9
Figure: Linear ARCNET, expanded by active distribution units (Active Hubs)