GE Fanuc IC695CPU310-GW Retrofit-Compatible CPU for Legacy Systems

GE Fanuc IC695CPU310-GW Retrofit-Compatible CPU for Legacy Systems

The GE Fanuc IC695CPU310-GW is a high-performance central processing unit designed for the PACSystems RX3i control platform — one of the most widely deployed PLC architectures in process manufacturing, utilities, oil & gas, and discrete automation. As legacy GE Series 90-30 and early RX3i installations approach end-of-life, the IC695CPU310-GW has become a critical retrofit solution for maintenance engineers and procurement teams seeking to extend system life without a full platform migration.

For facilities running aging IC693CPU374, IC693CPU364, or IC695CPU310 variants, the IC695CPU310-GW provides a direct upgrade path that preserves existing rack infrastructure, I/O wiring, and ladder logic programs. Its compatibility with the Universal Backplane (IC695CHS016 and IC695CHS012) means engineers can slot in the new CPU without modifying the physical cabinet layout — a key advantage when downtime windows are measured in hours, not days.

NINERMAS supplies the IC695CPU310-GW from verified stock, pre-shipment tested, with a 12-month warranty and long-term supply commitment. Every unit undergoes functional verification before dispatch to ensure it meets GE Fanuc’s original performance specifications.

Upgrade Compatibility Table

Retrofit Planning for Existing Automation Systems

A successful IC695CPU310-GW retrofit begins well before the module arrives on site. Maintenance engineers should start by auditing the existing control cabinet to confirm the backplane model — the IC695CHS016 or IC695CHS012 universal backplane supports the IC695CPU310-GW directly, while older Series 90-30 racks (IC693CHS391, IC693CHS392) require a transition backplane or a more comprehensive rack replacement strategy.

Power supply capacity is the next critical checkpoint. The IC695PSA040 (120/240VAC input, 40W output) and IC695PSD040 (24VDC input) are the standard companions for this CPU in RX3i systems. If the existing cabinet uses an older IC693PWR321 or IC693PWR330 power supply, engineers must verify that the supply rail voltage and current capacity are sufficient to support the IC695CPU310-GW alongside installed I/O modules such as the IC695ALG600 analog input module or IC695MDL740 discrete output module.

Communication continuity is equally important. The IC695CPU310-GW supports embedded Ethernet, SRTP, and Modbus TCP, making it compatible with most SCADA and HMI systems already in use — including Proficy iFIX, Wonderware, and third-party HMI panels connected via IC695ETM001 Ethernet communication modules. If the legacy system relied on IC693CMM321 serial communication modules for Modbus RTU or DNP3 links, those modules can typically remain in the rack and continue operating alongside the new CPU without protocol reconfiguration.

I/O module address mapping must be verified in Proficy Machine Edition before the program is downloaded to the new CPU. Mixed racks containing IC694MDL655 discrete input modules, IC695ALG112 analog output modules, or IC695HSC304 high-speed counter modules should be mapped and cross-checked against the existing program’s reference table. Any changes to the I/O tree in PME must be validated in offline simulation before live commissioning to prevent unexpected output states during startup.

For systems with IC695RMX128 redundancy memory exchange modules or hot-standby CPU configurations, the retrofit plan must account for synchronization re-establishment after the primary CPU is replaced. NINERMAS recommends staging the replacement during a planned maintenance window and keeping the original IC695CPU310 as a cold spare until the new unit has completed at least one full production cycle.

Terminal block wiring on IC694TBSx and IC695TBSx series terminal bases does not require modification during a CPU swap, which significantly reduces retrofit labor time. However, engineers should inspect field wiring for insulation integrity and verify that signal isolators — particularly for 4–20mA analog loops — are functioning correctly before restoring process control.

Downtime Control During System Migration

Minimizing unplanned downtime is the primary concern for any control system retrofit. The IC695CPU310-GW’s compatibility with the existing RX3i universal backplane means the physical swap can typically be completed in under 30 minutes by a qualified controls engineer — the dominant time cost is program verification and I/O checkout, not hardware installation.

Before beginning the swap, engineers should export a full backup of the existing CPU program using Proficy Machine Edition, including all hardware configuration, variable tables, and motion parameters if IC695PMM335 motion modules are present. This backup serves as both a rollback reference and the baseline for the new CPU’s initial program load.

During the migration window, process engineers should place field devices in manual or safe-state mode where possible. For continuous process lines where a full shutdown is not feasible, partial I/O isolation using IC695ALG600 analog input modules in hold-last-value mode can maintain process stability while the CPU is offline. Once the IC695CPU310-GW is installed and powered, the program download via Ethernet typically completes in under five minutes, after which I/O force testing can begin immediately.

Post-commissioning, the system should be monitored for at least one full production cycle before the maintenance team signs off. NINERMAS provides technical support during the commissioning phase and maintains long-term spare parts availability for the IC695CPU310-GW and associated RX3i modules, ensuring that future maintenance cycles can be planned with confidence.

All units supplied by NINERMAS are covered by a 12-month warranty from the date of shipment, with pre-shipment functional testing documented and available upon request. For volume procurement or long-term supply agreements, contact our technical sales team directly.

Retrofit Support FAQ

Q1: Is the IC695CPU310-GW a direct drop-in replacement for the IC695CPU310?
Yes. The IC695CPU310-GW is mechanically and electrically compatible with the IC695CPU310 and installs directly into any RX3i universal backplane (IC695CHS016 or IC695CHS012) without modification. The existing program can be downloaded to the new CPU using Proficy Machine Edition after a hardware configuration update to reflect the new firmware revision.

Q2: Can the IC695CPU310-GW replace older Series 90-30 CPUs such as the IC693CPU374?
Direct slot replacement is not possible due to backplane differences between the Series 90-30 and RX3i platforms. However, GE Fanuc’s RX3i transition backplane (IC695CHS007) allows Series 90-30 I/O modules to be used in an RX3i rack, enabling a phased migration where the CPU and backplane are upgraded first while existing I/O modules are retained. NINERMAS can advise on the appropriate transition hardware for your specific configuration.

Q3: What testing does NINERMAS perform before shipping the IC695CPU310-GW?
Every IC695CPU310-GW unit undergoes functional power-on testing, firmware version verification, and communication port validation before dispatch. A test report is available upon request. Units are packaged in anti-static ESD-safe materials and shipped with appropriate cushioning to prevent transit damage.

Q4: What is the warranty coverage and long-term supply commitment for the IC695CPU310-GW?
NINERMAS provides a 12-month warranty from the date of shipment covering manufacturing defects and functional failures under normal operating conditions. We maintain committed stock for the IC695CPU310-GW and associated RX3i modules to support long-term maintenance programs. For annual procurement agreements or multi-unit orders, contact our sales team for pricing and lead time confirmation.