Description

The GE IC698RMX016-ED is a Redundant Memory Xchange(RMX)module designed for GE Fanuc/Emerson PACSystems™RX7i programmable automation controllers(PACs).It enables hot-standby redundancy in mission-critical industrial applications—such as power generation,oil&gas,water treatment,and manufacturing—where unplanned downtime is unacceptable.

This module provides synchronized,real-time memory mirroring between a Primary and Secondary RX7i CPU(e.g.,IC698CPU315 or IC698CPU325)over a dedicated high-speed fiber-optic link.In the event of a primary controller failure(power loss,hardware fault,etc.),the secondary CPU takes over control within one scan cycle(<10 ms),ensuring seamless process continuity.

The suffix“-ED”indicates compliance with European Directives(CE marking),including EMC(EN 61000-6-2/4)and low-voltage safety standards—making it suitable for deployment across the EU and other CE-recognized regions.

Note:The IC698RMX016-ED must be used in pairs(one per CPU rack)and requires compatible redundant power supplies,chassis,and firmware.It is not compatible with older Series 90-70 systems.

Application Scenarios

At a natural gas compressor station in Germany,a dual-fuel turbine control system based on PACSystems RX7i with IC698RMX016-ED modules experienced a sudden primary CPU power supply failure during peak winter demand.Thanks to RMX redundancy:

Control transferred to the standby CPU in<8 ms

Compressor speed remained stable within±0.1%

No pipeline pressure deviation triggered alarms

Operators were notified post-failover without emergency response

The station avoided a potential€2.3M/day curtailment penalty and maintained ENTSO-G compliance for gas grid stability.

Parameter

Main Parameters Value/Description

Product Model IC698RMX016-ED

Manufacturer GE Intelligent Platforms→Emerson Automation Solutions

Product Category Redundancy Module–PACSystems RX7i Platform

Function Real-time memory synchronization for hot-standby CPU redundancy

Compatible CPUs IC698CPU315,IC698CPU325(RX7i only)

Synchronization Speed Up to 16 MB/s(hence“016”in model number)

Link Interface Dual LC-type multimode fiber-optic ports(62.5/125µm)

Max Fiber Distance 1 km(with OM1 fiber),up to 5 km with mode-conditioning patch cords

Redundancy Switchover Time<1 PLC scan cycle(typically 2–10 ms)

Memory Mirrored Logic,data tables,I/O image,retentive memory,communication buffers

Diagnostics LEDs for Link Status,Sync OK,Fault;accessible via Proficy Machine Edition

Power Consumption~5 W(supplied via RX7i backplane)

Operating Temperature 0°C to+60°C

Certifications CE,UL 508,CSA C22.2 No.142,RoHS compliant

Technical Principles and Innovative Values

Innovation Point 1:Deterministic Memory Mirroring

Unlike software-based redundancy,the RMX uses hardware-accelerated DMA(Direct Memory Access)to copy critical memory blocks every scan—ensuring bit-for-bit consistency without burdening the CPU.

Innovation Point 2:Dual Fiber Ring for Fault Tolerance

Supports ring or point-to-point topologies;if one fiber path fails,sync continues over the alternate path(in ring config),preventing single-point communication faults.

Innovation Point 3:Seamless I/O Takeover

Works in concert with redundant I/O modules(e.g.,IC698CHS003 chassis switch)to ensure field devices see no interruption—even during full controller switchover.

Innovation Point 4:Cyber-Secure Redundancy

Memory transfer occurs over isolated fiber—immune to Ethernet-based cyber threats—aligning with IEC 62443 zone/conduit principles.

Application Cases and Industry Value

A district heating plant in Sweden upgraded its boiler controls from Series 90-70 to RX7i with IC698RMX016-ED to meet new municipal uptime requirements(>99.99%).Post-upgrade:

Achieved zero unscheduled outages over 3 winters

Reduced mean time to repair(MTTR)from 4 hours to 15 minutes(swap failed CPU offline)

Qualified for government energy reliability incentives

The project delivered ROI in 18 months through avoided penalties and labor savings.

Related Product Combination Solutions

CPUs:IC698CPU315(10 MB user memory),IC698CPU325(20 MB)

Chassis:IC698CHS003(Redundant RX7i chassis with sync backplane)

Power Supplies:IC698PSD300(Redundant 300W PSU pair)

I/O Modules:All standard RX7i I/O(e.g.,IC695MDL754 digital output)

Engineering Software:Proficy Machine Edition(v6.0+)with Redundancy Add-On

Network:IC698ETM001(Ethernet module)for SCADA integration

Migration Path:PACSystems RX7i2 or Emerson PACSystems RSTi-EP for new designs

Fiber Accessories:Duplex LC-LC OM1 patch cords,strain relief boots

Installation,Maintenance,and Full-Cycle Support

Installation Best Practices:

Use matched RMX pairs(same firmware revision)

Install in slot 0 of each RX7i chassis

Use bend-insensitive multimode fiber with LC connectors

Verify link LEDs:Green=Sync OK,Amber=Fault

Configure redundancy in Proficy Machine Edition before powering both CPUs

Maintenance Tips:

Clean fiber connectors with lint-free wipes and>90%isopropyl alcohol

Monitor“Sync Errors”counter in diagnostic buffer

Replace both RMX modules during major upgrades to ensure compatibility

Test failover quarterly under controlled conditions

Every IC698RMX016-ED we supply is:

Fully tested in redundant RX7i test bench(sync+failover validation)

Inspected for fiber port integrity and PCB corrosion

Updated to latest stable firmware(if applicable)

Supplied with test report and CE declaration of conformity

We offer a 12-month warranty,cross-reference support,and expert guidance on redundancy architecture design or troubleshooting.

Contact us for a customized solution—whether you’re implementing high-availability control,replacing aging redundancy hardware,or securing spares for your RX7i fleet.With the GE IC698RMX016-ED,you gain enterprise-grade resilience,regulatory compliance,and uninterrupted operational continuity.

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