The PACSystems* RX3i Redundancy CPU can be used to

perform real time control of machines, processes, and

material handling systems. The CPU communicates with the

programmer and HMI devices via a serial port using SNP

Slave protocol. It communicates with I/O and smart option

modules over a dual backplane bus that provides:

▪ High-speed PCI backplane for fast throughput of new advanced I/O.

▪ Serial backplane for easy migration of existing Series 90*-30 I/O.

Features

▪ Hot standby (HSB) redundancy. Two redundant units

make up a redundancy system. Each unit requires one

Redundancy CPU (IC695CRU320) and a redundancy

Memory Xchange module (IC695RMX128/228) configured

as a redundancy link.

▪ Contains 64 Mbytes of battery-backed user memory and

64 Mbytes of non-volatile flash user memory.

▪ Provides access to bulk memory via reference table %W.

▪ Configurable data and program memory.

▪ Programming in Ladder Diagram, Structured Text,

Function Block Diagram, and C. Refer to PACSystems RX7i

& RX3i CPU Programmer’s Reference Manual, GFK-2950.

▪ Supports auto-located Symbolic Variables that can use

any amount of user memory.