GE PACSystems RX3i

Chapter 1. Introduction
24 PACSystems* RX3i & RSTi-EP PROFINET IO-Controller User Manual GFK-2571N
1.6.9 Systems that use Hot Standby CPU Redundancy
Figure 14 shows a Hot Standby CPU Redundancy system that uses a PROFINET I/O network with
MRP ring topology. Use of MRP ring topology is recommended because it eliminates the I/O network
as a single point of failure. If elimination of a single point of failure is not required, a star topology can
be used.
These systems are described in the PACSystems Hot Standby CPU Redundancy User’s Manual,
GFK-2308F or later.
1.6.9.1 Hot Standby CPU Redundancy Network with MRP Ring Topology
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Redundancy Links
RX3i
Primary
Controller
RX3i
Secondary
Controller
HMI
PME
HMI
Historian
Redundant IP
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Remote IO Device Remote IO Device Remote IO Device Remote IO Device
Supervisory Ethernet Network
(Up to 8 separate networks
allowed)
PROFINET I/O Network
RING
(Up to 4 separate networks allowed)
Figure 14: RX3i Hot Standby CPU Redundancy Network with MRP Ring Topology