Description
Product Introduction & Engineering Value
A planned shutdown is manageable. An unexpected controller failure during production is not. The GE IC695CMU310 is designed for applications where continuous operation is a requirement, providing Hot-Standby CPU redundancy for PACSystems RX3i controllers.
Working as a matched redundant CPU pair, the IC695CMU310 continuously synchronizes application data over dedicated Ethernet networks. If the active controller fails, control transfers to the standby processor within only a few logic scans, helping maintain I/O operation with minimal process interruption.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE Intelligent Platforms / Emerson |
| Model | IC695CMU310 |
| Product Family | PACSystems RX3i |
| CPU Type | Max-ON Hot-Standby Redundancy CPU |
| Processor Speed | 300 MHz |
| User Logic Memory | 10 MB Battery-Backed SRAM |
| Flash Memory | 10 MB Non-Volatile Flash |
| Serial Ports | 1 × RS-232, 1 × RS-485 |
| Backplane | RX3i Universal Backplane |
| Maximum Program Blocks | 512 |
| Maximum Block Size | 128 KB |
| Supported Expansion | RX3i and selected Series 90-30 modules |
| Firmware | Field Upgradeable |
| Redundancy Method | Dedicated Ethernet Synchronization |
Field Application & The “Trench” Experience
A combined-cycle power plant could not tolerate a complete PLC outage because an unexpected shutdown would force several hours of restart procedures. Engineers replaced a conventional RX3i processor with a pair of IC695CMU310 CPUs configured for Max-ON redundancy.
Months later, one controller unexpectedly developed a hardware fault during operation. The standby CPU assumed control within a few logic scans, operators remained unaware of the transition, and turbine operation continued without process interruption. The failed processor was replaced during scheduled maintenance rather than during an emergency shutdown.
Typical applications include:
- Combined-cycle power generation control
- Refinery emergency utility management
- Continuous paper machine process control
- High-availability water treatment supervisory systems
IC695CMU310
IC695CMU310
IC695CMU310
Transparency SOP: QA & Testing
Before shipment, every New Surplus or refurbished IC695CMU310 completes a documented verification process:
- PCB and connector inspection under magnification.
- Power-up verification in an RX3i Universal Backplane.
- CPU boot diagnostics and memory integrity testing.
- Flash memory read/write verification.
- Serial communication port testing.
- Firmware revision identification and documentation.
- Redundancy synchronization verification using a paired Max-ON CPU.
- Burn-in operation followed by ESD-safe packaging.
The Veteran’s Tech Trap Guide
⚠️ One CPU Doesn’t Create Redundancy
The IC695CMU310 is intended to operate as part of a redundant pair. Installing only one processor provides standard CPU functionality but does not deliver Hot-Standby protection.
⚠️ Verify Firmware Before Installation
Mixed firmware revisions between redundant CPUs can prevent synchronization. Always confirm both processors are running compatible firmware before commissioning.
PRO TIP:
Don’t overlook the Ethernet redundancy network. Many commissioning delays are ultimately traced to switch configuration, VLAN settings, or network cabling rather than the CPUs themselves.
⚠️ Battery Maintenance Still Matters
Although Flash memory is available, battery-backed SRAM retains critical runtime information. A depleted battery can create unnecessary maintenance headaches during extended outages.
Dynamic FAQ
Q1. What is the primary purpose of the ?
It is a Max-ON Hot-Standby Redundancy CPU designed for PACSystems RX3i systems that require continuous controller availability with automatic failover.
Q2. How quickly does controller switchover occur?
Under normal operating conditions, control transfers from the active CPU to the standby CPU within approximately two to three logic scans while maintaining I/O states.
Q3. Which communication ports are built into the CPU?
The processor includes one RS-232 serial port and one RS-485 serial port supporting protocols such as SNP and Modbus applications.
Q4. Is New Surplus inventory unused?
Yes. New Surplus units are genuine OEM inventory that has never been placed into industrial service. Each module undergoes identification verification and inspection before shipment.
Q5. How are refurbished CPUs tested?
Refurbished units undergo CPU diagnostics, memory testing, communication port verification, firmware validation, redundant synchronization testing, and extended operational burn-in before release.
Q6. Is the compatible with Series 90-30 hardware?
Yes. The CPU supports PACSystems RX3i systems and selected Series 90-30 expansion modules when installed according to the manufacturer’s compatibility guidelines.
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