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IC695CRU320 — GE Fanuc PACSystems RX3i Redundancy CPU
The IC695CRU320 is a Redundancy CPU for the GE Fanuc PACSystems RX3i programmable automation controller. Built around an Intel Celeron 1 GHz processor, it is designed to run as part of a dual-redundant hot-standby pair, keeping a plant's control logic executing without interruption if the primary CPU ever faults.
This is one of the high-availability workhorses of the RX3i platform. Where a standard RX3i CPU tops out at a single unit, the IC695CRU320 pairs with a matching redundancy CPU and a redundancy link module so that the two controllers continuously synchronize — one actively controlling, the other ready to take over in milliseconds. That makes it a natural fit for continuous-process industries where unexpected downtime is measured in real money.
Key Specifications
| Manufacturer | GE Fanuc / General Electric (now Emerson) |
| Model / Part Number | IC695CRU320 |
| Product Line | PACSystems RX3i |
| Product Type | Redundancy CPU Module |
| Processor | Intel Celeron 1 GHz |
| User Memory | 64 MB |
| Redundancy | Dual hot-standby CPU configuration (requires matching redundancy CPU + redundancy link) |
| Communications | Embedded Ethernet (10/100 Mbps) + serial ports; supports Genius, Profibus, EGD, Modbus TCP/RTU via RX3i modules |
| Backplane | RX3i universal backplane (PCI-type high-speed bus) |
| Programming Software | Proficy Machine Edition (PME) / Logic Developer |
| Status | Legacy / mature product — supported through spare-parts and repair channels |
Note: Specifications are compiled from public product documentation and industrial listings. Confirm the exact revision, firmware, and compatibility of any redundant pair before ordering.
Product Functions
- Hot-standby redundancy: Runs in a synchronized pair with a matching redundancy CPU, so control logic continues executing seamlessly if the active unit fails.
- Fast failover with no data loss: The standby CPU stays continuously synchronized — including memory, I/O state, and application logic — enabling a bumpless transfer to the backup.
- High-speed control execution: The 1 GHz Intel Celeron processor handles demanding logic, motion, and process-control tasks in real time.
- Extensive I/O and network support: Communicates over embedded Ethernet and serial ports, and supports Genius, Profibus, EGD, and Modbus TCP/RTU through RX3i I/O and comm modules.
- Multi-language programming: Supports Ladder Diagram, Structured Text, Function Block Diagram, and C programming via Proficy Machine Edition.
- Diagnostics & fault status indication: Front-panel LEDs and software diagnostics report CPU, redundancy link, and communication health for fast troubleshooting.
- Scalable PACSystems integration: Part of a common RX3i architecture, allowing expansion with a wide range of standard RX3i modules.
Application Scenarios
- Power generation & utilities: Turbine control, boiler management, and plant auxiliary systems where continuous uptime is critical.
- Oil & gas — upstream and midstream: Pipeline control, compressor stations, and refinery process units requiring failover protection.
- Water & wastewater treatment: High-availability monitoring and control of pumps, valves, and treatment processes.
- Petrochemical & chemical processing: Redundant control of continuous processes where a CPU fault would interrupt production.
- Metals, mining & heavy industry: Demanding control applications needing fast, synchronized processor performance.
- Legacy RX3i system maintenance: Replacement or spare CPU for plants running existing PACSystems RX3i infrastructure with redundancy requirements.
Frequently Asked Questions
What is the IC695CRU320?
It is a Redundancy CPU module for the GE Fanuc PACSystems RX3i controller, built with an Intel Celeron 1 GHz processor and 64 MB of user memory. It is designed to run in a dual hot-standby configuration.
Does it work as a standalone CPU?
It is intended for redundancy applications. To use it in a redundant pair, you need a matching redundancy CPU and a redundancy link module to carry synchronization data between the two units. Confirm the exact pairing requirements of your system before purchase.
What is the advantage of the redundancy design?
If the active CPU fails, the standby unit — which has been continuously synchronized — takes over with no data loss and no interruption to the controlled process. This "bumpless" transfer is what makes it suitable for continuous-process industries.
What software is used to program it?
It is programmed and configured with GE's Proficy Machine Edition (Logic Developer), supporting Ladder Diagram, Structured Text, Function Block Diagram, and C programming.
Is the IC695CRU320 still manufactured?
It is a mature/legacy product. New stock, refurbished units, and repair services are generally available through industrial automation spare-parts channels. Contact your supplier to confirm current availability and pricing.
What should I verify before ordering a replacement?
Check the firmware/revision level, the redundancy pairing requirements, your existing rack configuration, and the software version used in your project. Because redundant systems are sensitive to revision mismatches, matching the exact specifications of the failed unit is important.
