IC695CMU310 Max‑ON Hot‑Standby Redundancy CPU Module for GE PACSystems RX3i PLC Platform
IC695CMU310 Max‑ON Hot‑Standby Redundancy CPU Module for GE PACSystems RX3i PLC Platform - Image 2
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IC695CMU310 Max‑ON Hot‑Standby Redundancy CPU Module for GE PACSystems RX3i PLC Platform - Image 4

IC695CMU310 Max‑ON Hot‑Standby Redundancy CPU Module for GE PACSystems RX3i PLC Platform

  1. IC695CMU310 — Max‑ON Hot‑Standby Redundancy CPU (Target Item)
  2. IC695CPU310 — Standard 300MHz RX3i CPU
  3. IC695CPU320 — High‑performance 1GHz RX3i CPU
  4. IC695CRU320 — High‑end bumpless redundant CPU
  5. IC695ETM001 — RX3i Ethernet communication module
  6. IC695PNC001 — PROFINET controller module
  7. IC695DI240 — Digital input module
  8. IC695ALG600 — Universal analog I/O module
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Description

IC695CMU310 Max‑ON Hot‑Standby Redundancy CPU Module for GE PACSystems RX3i PLC Platform

 

Product Introduction

The IC695CMU310 is a single‑slot hot‑standby redundancy controller for the GE Fanuc PACSystems RX3i programmable automation platform (now Emerson). It adopts Max‑ON hot‑standby technology to build a bumpless redundant control pair: the primary CPU executes control logic in real time while the backup CPU continuously synchronizes program, I/O and variable data. Instant switchover to the standby unit occurs upon main CPU failure with nearly zero process downtime. Equipped with two galvanic isolated serial ports (software configurable RS232 / RS485), it supports Modbus RTU, SNP and generic ASCII protocols to directly connect to drives, meters and third‑party devices. It carries 10 MB battery‑backed RAM and 10 MB non‑volatile flash memory for program and data storage. It works with RX3i universal backplane and full series RX3i I/O modules. This CPU is widely used in critical industrial sites and is a high‑demand spare for plant preventive maintenance and emergency replacement.

 

Specific Application Information

  • Redundant process control: Build dual‑CPU hot‑standby system for critical production loops to avoid PLC single‑point failure shutdown.
  • Serial field device communication: Connect VFDs, transmitters, weighing instruments via RS485 Modbus RTU.
  • Logic & closed‑loop control: Execute Boolean logic, timing, counting, PID regulation and sequential control programs.
  • I/O data management: Exchange DI/DO, AI/AO signals with RX3i I/O modules on the backplane.
  • Data synchronization: Real‑time mirroring of runtime variables and I/O status between primary and standby CPU.
  • Alarm & event logging: Store system fault records and process alarm events for post‑failure analysis.
  • Third‑party system interconnection: Communicate with upper DCS, SCADA and HMI through serial ports or extended Ethernet modules.
  • Legacy system upgrade: Direct replacement for older RX3i controllers during automation retrofit projects.

IC695CMU310

Technical Parameters

Parameter Specification
Model IC695CMU310
Platform PACSystems RX3i
Redundancy Mode Max‑ON Hot‑Standby
Memory 10 MB battery‑backed RAM, 10 MB non‑volatile Flash
Serial Ports 2 × galvanic isolated ports, RS‑232 / RS‑485 software selectable
Serial Protocols Modbus RTU Master/Slave, SNP, DF1, Generic ASCII
Isolation 1500 VAC isolation between serial channels and backplane
Boolean Execution Speed ~0.195 ms per 100 Boolean instructions
Slot Occupation Single slot on RX3i universal backplane
Power Supply Powered by RX3i backplane, +5V 1.0A / +3.3V 1.25A
Operating Temperature 0°C ~ +60°C
Relative Humidity 5% – 95%, non‑condensing
Weight Approx. 0.45 kg
Origin USA

 

Main Features

✅ Max‑ON bumpless hot‑standby redundancy: Fast seamless switchover between primary and standby CPU without process interruption. ✅ Dual isolated serial communication ports: Flexible RS232 / RS485 configuration for field instrument connection. ✅ Rich industrial protocol support: Built‑in Modbus RTU and GE native SNP protocol. ✅ Large onboard memory: Battery‑backed RAM keeps data safe when power fails, Flash for permanent program storage. ✅ Backplane powered: No separate external power supply required, easy rack installation. ✅ Complete front LED status indication: Power, Run, Fault and communication TX/RX indicators for quick on‑site diagnosis. ✅ Full RX3i ecosystem compatibility: Works with universal backplane and all RX3i digital, analog and specialty I/O modules. ✅ Solid industrial grade: Designed for continuous 24/7 operation in heavy‑duty industrial control cabinets.

 

Application Scenarios

  1. Oil & Gas Plants: Wellhead, pipeline and compressor skid redundant PLC control.
  2. Chemical Production Lines: Reactor, distillation unit and batch process high‑availability automation.
  3. Power Plants: Auxiliary system, water treatment and boiler auxiliary control.
  4. Metallurgical Mills: Furnace, rolling mill and material conveying control system.
  5. Water & Wastewater Facilities: Pump station, filter and chemical dosing redundant control.
  6. Mining Conveying Systems: Long‑distance belt conveyor safety and process control.
  7. Marine & Offshore Skids: Critical equipment automation for offshore packages.

 

Supporting Components

  • RX3i universal backplane / chassis
  • Matching IC695CMU310 for redundant pair configuration
  • RX3i I/O modules (DI, DO, AI, AO, high‑speed counter modules)
  • IC695 series Ethernet communication modules for network expansion
  • Isolated RS232 / RS485 communication cables
  • Proficy Machine Edition programming & diagnostic software
  • Battery backup unit for RAM data retention
  • Redundant rack power supply modules
  • Terminal blocks and signal wiring accessories

 

Related Series Models (GE PACSystems RX3i Family, 8 Models)

  1. IC695CMU310 — Max‑ON Hot‑Standby Redundancy CPU (Target Item)
  2. IC695CPU310 — Standard 300MHz RX3i CPU
  3. IC695CPU320 — High‑performance 1GHz RX3i CPU
  4. IC695CRU320 — High‑end bumpless redundant CPU
  5. IC695ETM001 — RX3i Ethernet communication module
  6. IC695PNC001 — PROFINET controller module
  7. IC695DI240 — Digital input module
  8. IC695ALG600 — Universal analog I/O module

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