Figure 34: Typical Multi-Tier Lan Application (Star/Bus Topology); Figure 35: Typical Multi-Tier Lan Application (Ring Topology) - GE PACSystems RX7i Reference Manual

Chapter 2. CPU Features & Specifications
Ethernet Topology
A typical application will take advantage of the two independent LANs. The dedicated LAN1 port will be
used for communications with plant-level or supervisory layers. The switched LAN2 will be used to
communicate with devices over PROFINET within the manufacturing cell or process.

Figure 34: Typical Multi-Tier LAN Application (Star/Bus Topology)

Whenever CPE100/CPE115 is configured for MRP only Ethernet Port2 & Port3 of LAN2 can be used to
form a ring. Ethernet Port4 of LAN2 can still be used either to connect programmer, simplex PROFINET
device or any other supported Ethernet protocols.

Figure 35: Typical Multi-Tier LAN Application (Ring Topology)

106 PACSystems* RX7i, RX3i and RSTi-EP CPU Reference Manual GFK-2222AD