Siemens Electrical Lean Switch - Manual (Page 18)

Network Topologies
Industrial Ethernet
18 A5E00152007-03
3.1 Network Topologies with ELS TP40
Attachment of individual remotely located DTEs over ELS TP40 to a TP network
Figure 4: ELS TP40 Bus Topology
Figure 5: ELS TP40 Star Topology