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RX3i CMU310 CPU Processor

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SKU 2177359  UPC 0449397639798

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Surplus New


1 In Stock

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1 In Stock

✓  2 Year PDF Supply Warranty

*What is Remanufactured?

Repair Service


5-10 Days

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Product Description

The IC695CMU310 is a Max-ON Hot-Standby Redundancy CPU module from the GE Fanuc RX3i Series.  This module provides Hot-Standby CPU redundancy using two RX3i systems.  See specifications for this unit on IC695CMU310's website page.

Technical Specifications

Module Type: Central Processing Unit
Number of Slots: 1 (single slot)
Backplane Support:  Universal Backplane
Protocol Support: Modbus RTU Slave, SNP, Serial I/O     
Communication Ports:  (2) Isolated RS-232 and RS485
Internal Power: 1.0A @ +5 VDC, 1.25A @ +3.3 VDC

Technical Information


Battery: Memory retention

RX3i CPU Lithium Smart Battery, IC695ACC302 (recommended), Series 90-30 Lithium Battery Pack, IC693ACC302, or IC698ACC701 Smart Coin Cell Battery Pack

Program storage

Up to 10 Mbytes battery-backed RAM; 10 Mbytes non-volatile flash user memory

Power requirements

+3.3 VDC: 1.25 Amps nominal

+5 VDC: 1.0 Amps nominal

Operating Temperature

0 to 60°C (32°F to 140°F)

Floating point


Boolean execution speed

0.195ms per 1000 Boolean instructions, typical

Time of Day Clock accuracy

Maximum drift of 2 seconds per day

Elapsed Time Clock (internal timing) accuracy

0.01% maximum

Embedded communications

RS-232, RS-485

Serial Protocols supported

Modbus RTU Slave, SNP, Serial I/O


Dual backplane bus support: RX3i PCI and 90-30-style serial

PCI compatibility

System designed to be electrically compliant with PCI 2.2 standard

Program blocks

Up to 512 program blocks. Maximum size for a block is 128KB.


%I and %Q: 32Kbits for discrete

%AI and %AQ: configurable up to 32Kwords

%W: configurable up to the maximum available user RAM Symbolic: configurable up to 10 Mbytes


Troubleshooting IC695CMU310

Troubleshooting information is available on IC695CMU310's website page; it also includes a datasheet user-manual and a wiring diagram.

Repair your IC695CMU310

PDF Supply can repair your IC695CMU310 in 3-5 business days. And PDF Supply stands by all of its repairs with a 1 year customer satisfaction warranty.

Customer Questions and Answers


  • Question:  What is an IC695CMU310?  Answer:   The IC695CMU310 is a Max-ON, Hot-Standby, Redundancy Central Processing Unit from the GE Fanuc RX3i Series.
  • Question:  What does IC695CMU310 provide?  Answer:  This CPU provides Hot-Standby CPU Redundancy using 2 RX3i systems. 
  • Question:  How do the redundant controllers exchange operating data?  Answer:  They exchange operating data by way of 1 or 2 dedicated Ethernet LANs.
  • Question:  Of what does each RX3i system in a Max-ON application consist?  Answer:
    • The Max-ON CPU (IC695CMU310)
    • An RX3i Universal Backplane (IC695CHS0xx)
    • An RX3i power supply (IC695PSxxxx)
    • 1 or more RX3i Ethernet modules (IC695ETM001)
    • Max-ON application software
    • Optional Series 90-30 expansion backplanes
    • PACSystems RX3i and/or Series 90-30 modules, as appropriate for the application
  • Question:  Is IC695CMU310 compatible with a wide range of RX3i and Series 90-30 modules, backplanes, and other equipment?  Answer:  Yes!
  • Question:  Max-ON redundancy applications include what?  Answer:
    • Fuel loading
    • Standby power generation
    • Boiler systems
    • Manufacturing systems
  • Question:  What should I do if my IC695CMU310 is not working properly?  Answer:  Your IC695CMU310 may need to be repaired.

For more information on the IC695CMU310 Max-On, Hot-Standby, Redundancy Central Processing Unit of the GE Fanuc RX3i Series, please see the Datasheet User-Manual.

Catalog Number





Corrects the behavior of the Logic Driven Read/Write to Flash service requests, SVC_REQ56 and SVC_REQ 57.



Introduces support for new modules, enhancements to the Modbus RTU protocol, improved Run signal handling in the expansion rack and other improvements. Resolves several problems found in earlier releases.



Provides for OEM protection in flash-based systems that do not use a battery. For additional problems resolved, see GFK-2420N.



Adds User Defined Types, Variable Indexed Arrays, Logic Driven Write to Flash, and Backplane Operations Controller Enhancement features. See GFK-2420M for details and problems resolved.



Enables support functionally identical to the IC695CMX128 for the IC695RMX128.



Corrects the problem described in GFK-2420K.



Supports the IC695PMM335 PACMotion Multi-Axis Motion Controller. Provides other new features and corrects the problems listed in GFK-2420K.



Supports Run-mode store of EGD. Adds support for LREAL data type.



Corrects problems described in GFK-2420G.



Fixed an issue where certain IC694/IC693 modules in the main backplane did not transition to stop mode after a “Loss of Module” fault was logged.



Supports Scan_Set_IO, Quality Function Blocks, Optional UDF Parameters, IEC Transitionals, SNPT Network time sync.



Supports the RX3i Serial Communications Modules IC695CMM002 and CMM004.






Supports eight ETM modules in main backplane






Initial Release

ST. LOUIS, Feb. 1, 2019 – Emerson today announced it has completed the purchase of Intelligent Platforms from General Electric.
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