Chapter 2: System Overview; Architecture - Emerson PACSystems RX3i User Manual

User Manual
GFK-2409B

Chapter 2: System Overview

2.1

Architecture

A Max-ON RX3i Hot Standby Redundancy system consists of two PACSystems Max-ON RX3i
Controllers, at least one dedicated Ethernet Synchronization link, and an I/O system
comprised of at least one I/O LAN.
The Ethernet Synchronization link is used to exchange status and synchronization data
between the two Max-ON RX3i Controllers. For higher system availability, dual redundant
LANs may be employed.
The I/O LAN is used to communicate with the I/O devices that are attached to it. The I/O
system may be implemented using a combination of Ethernet drops (Series 90-30 ENIU or
PACSystems RX3i ENIU); or Genius drops (Genius I/O, Field Control I/O, VersaMax I/O, or
Remote I/O drops based upon Series 90-30 I/O). The example below shows the Max-ON RX3i
controllers connected to a single Ethernet I/O LAN.
Figure 9:
Max-ON RX3i has been designed to satisfy applications that have high performance
requirements. It has support for up to 8 simplex or 4 dual Genius I/O busses, and up to 3
Ethernet I/O busses.
System Overview
Chapter 2
Oct 2019
7