GE IC695CRU320 Hot‑Standby Redundant CPU Module

Technical Specifications

Model: IC695CRU320

Brand: GE Fanuc（Emerson Automation）

Product Type: RX3i PACSystem hot‑standby redundant CPU processor module

Applicable System: GE PACSystems RX3i backplane rack；dual‑backplane bus: high‑speed PCI bus + 90‑30 compatible serial backplane；supports most RX3i I/O and legacy Series 90‑30 modules

Processor: 1GHz Celeron‑M industrial embedded processor, supports floating‑point arithmetic

User Memory: 64MB battery‑backed RAM, 64MB non‑volatile flash memory for program, configuration and symbolic data storage

Boolean Scan Speed: Typical 0.047ms per 1000 boolean instructions

Program Blocks: Max 512 program blocks, single block max 128KB size

Discrete I/O Memory: %I/%Q 32K bits；Analog %AI/%AQ configurable up to 32K words each

On‑board Serial Ports: 1×RS232,1×RS485；supports Modbus‑RTU slave, SNP, serial I/O protocol；for programming, debugging and firmware upgrade

Redundancy Requirement: Requires paired IC695RMX128 reflective memory exchange module to build hot‑standby HSB redundant system；switchover time: minimum 3.133ms, maximum one logic scan cycle

Programming Software: Proficy Machine Edition, supports Ladder Diagram, Structured Text, Function Block Diagram, C‑language programming, IEC‑61131‑3 standard compliant

Real‑Time Clock: Battery‑backed TOD clock, maximum daily drift 2 seconds；internal high‑precision elapsed‑time timer

Battery Type: IC695ACC302 smart lithium battery for RAM data retention

Power Consumption: +3.3VDC 1.0A；+5VDC 1.2A, powered by RX3i backplane bus

LED Indicators: CPU OK, RUN, OUTPUTS ENABLED, I/O FORCE, BATTERY, SYS FLT, COM1/COM2 activity status LEDs on front panel

Installation Mode: RX3i rack plug‑in module, occupies two physical slots on RX3i baseplate

Operating Temperature:0℃ ~ +60℃, non‑condensing

Storage Temperature:‑40℃ ~ +85℃

Humidity:5%‑95% non‑condensing

Certification: UL, CE, CSA safety certification

Weight:1.10kg

Dimension:202mm ×100mm ×122mm

Application: Power‑plant auxiliary control, petrochemical continuous process, water‑treatment critical control, large‑scale manufacturing high‑reliability control, legacy RX3i hot‑standby system maintenance and spare‑part replacement.

Product Function Description

IC695CRU320 is the dedicated hot‑standby redundant CPU for GE Fanuc PACSystems RX3i PAC platform, designed for high‑availability industrial control scenarios where production interruption must be avoided.

This CPU adopts 1GHz Celeron‑M embedded processor, equipped with large‑capacity 64MB RAM and 64MB flash storage. It supports rich IEC‑61131‑3 programming languages, completes real‑time logic operation, closed‑loop process control, alarm processing and SOE sequence‑of‑event timestamp recording. Dual‑backplane architecture supports both new‑generation RX3i high‑speed I/O and legacy Series 90‑30 I/O modules, convenient for site upgrade and migration projects.

Two IC695CRU320 CPUs together with two IC695RMX128 reflective memory modules constitute a complete hot‑standby redundancy system. The standby CPU continuously synchronizes user programs, variable data, I/O status and system parameters from the primary CPU via reflective‑memory link. When main CPU fails due to hardware fault, power loss or other abnormalities, the system performs bumpless switchover within one scan cycle, the standby unit takes over control without stopping production process.

Front‑panel multi‑LED indicators clearly show CPU running state, battery condition, system fault and serial‑port communication status, helping maintenance personnel quickly locate faults. Serial ports support Modbus‑RTU and SNP protocols for local programming and debugging. Ethernet communication function is realized by matching external RX3i Ethernet module IC695ETM001, realizing data interaction with HMI and upper‑level DCS/SCADA system.

ECC memory error correction function improves operation stability. All configuration, programming, firmware upgrade and redundancy‑parameter setting are completed in Proficy Machine Edition software. Mixed‑model redundancy with other RX3i CPU types is not recommended, firmware versions of primary‑standby CPUs must be kept consistent.

Product Details

Two‑slot‑width plug‑in CPU module for RX3i rack, metal EMI‑shielding housing, industrial‑grade anti‑interference hardware design, adapts to complex electromagnetic‑interference environment of factory and power‑plant sites. This legacy redundant CPU has been discontinued by original manufacturer, mainly used for old‑equipment overhaul and spare‑part replacement. Please confirm baseplate slot occupation, battery condition, primary‑standby firmware consistency and matching IC695RMX128 module before commissioning. Strict ESD protection shall be adopted during installation.