Emerson PACSystems RX3i - Figure 5: Typical Multi-Tier LAN Application (Star;Bus Topology); Figure 6: Typical Multi-Tier LAN Application (Ring Topology)

PACSystems™ RX3i and RSTi-EP CPU Reference Manual Section 2
GFK-2222AK October 2019
CPU Features & Specifications 42
2.3.1.5 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 5: Typical Multi-Tier LAN Application (Star/Bus Topology)
QP+
Quick Panel+
OPC-UA Client
RSTi-EP Node 1
VersaMax PNS Node 4
Modbus RTU Master
RSTi-EP CPE100/115
Switch
RX3I CEP Node 2 Rx3i PNS Node 3
PROFINET MRP
OPC-UA Client
MODBUS TCP/SRTP
Modbus RTU(RS-232)
PROFINET
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 6: Typical Multi-Tier LAN Application (Ring Topology)