GE PACSystems RX3i

Chapter 6. Redundant Media
136 PACSystems* RX3i & RSTi-EP PROFINET IO-Controller User Manual GFK-2571N
6.3 Ring Topology with Multiple Controllers
Figure 100 shows a more complex network. There is one RX3i CPU node with two PROFINET Controllers, a
second RX3i CPU node with one PROFINET Controller, and five I/O Devices, in this case, PNS modules. The
PROFINET Controllers depicted are PNC001 modules, but could be embedded PROFINET Controllers.
All devices are on the same network ring. One PROFINET Controller is configured as the Media Redundancy
Manager (MRM); the other PROFINET Controllers and all PROFINET Scanners are configured as Media
Redundancy Clients (MRCs).
Figure 100: Ring Topology with Multiple Controllers