GE Fanuc IC695CPU315-BB RX3i CPU Replacement Solution

Product Overview

GE Fanuc IC695CPU315-BB RX3i CPU Replacement Solution: Smooth Migration from Legacy PACSystems

The GE Fanuc IC695CPU315-BB is a high-performance CPU module for the GE PACSystems RX3i platform, designed to replace end-of-life or discontinued controllers in mission-critical industrial automation environments. Whether you are migrating from an older Series 90-30 or Series 90-70 PLC architecture, or upgrading within the RX3i family from an earlier CPU revision, the IC695CPU315-BB delivers a smooth, low-risk transition with minimal rewiring and no major program restructuring.

At TOPNLMS, we stock the IC695CPU315-BB to support plant engineers and procurement teams who need a reliable, tested replacement with fast turnaround. Every unit ships from our Xiamen warehouse with full pre-shipment functional verification and is covered by a 12-month replacement warranty.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful migration to the IC695CPU315-BB rarely involves the CPU alone. In practice, plant engineers upgrading from a legacy Series 90-30 or Series 90-70 system will also need to evaluate the surrounding hardware to ensure full system compatibility.

The IC695RMX128 redundancy memory exchange module is commonly deployed alongside the IC695CPU315-BB in hot-standby redundancy configurations, allowing seamless CPU failover without process interruption — a critical requirement in continuous-process industries such as petrochemical, power generation, and water treatment. For installations requiring expanded I/O capacity, the IC695NIU001 RX3i network interface unit enables remote I/O expansion over EtherNet/IP, eliminating the need to run dedicated Genius Bus cabling across large plant floors.

Engineers migrating from Genius Bus-based architectures will find that the IC660CBB902 Genius Bus Controller remains compatible with the RX3i platform, allowing existing field wiring and Genius I/O blocks — such as the IC660BBD025 discrete I/O block — to be retained during the transition. This dramatically reduces rewiring costs and shortens commissioning time.

On the power supply side, the IC695PSA040 40-watt AC power supply is the standard companion for the IC695CPU315-BB in a standard RX3i rack. For installations with DC power infrastructure, the IC695PSD040 DC variant provides equivalent output with 24 VDC input compatibility. Both mount directly into the IC695CHS012 12-slot universal backplane, which accommodates the full range of IC695 series modules without slot restrictions.

For programming and firmware management, the IC690USB901 USB-to-serial programming cable is essential when establishing a direct connection between a laptop running Proficy Machine Edition and the CPU’s serial port — particularly during initial commissioning or when Ethernet connectivity is not yet established. Facilities that require operator interface integration will typically pair the IC695CPU315-BB with a QuickPanel+ IC755CSS10CDA HMI, which supports native EtherNet/IP communication to the RX3i CPU without additional gateway hardware.

Finally, for applications where legacy 4–20 mA analog signals must interface with the new RX3i system, the IC695ALG608 8-channel analog input module provides high-resolution signal acquisition directly in the IC695 backplane, replacing older IC693ALG series analog modules with improved accuracy and faster scan rates.

Retrofit Guidance FAQ

Q: Can I reuse my existing field wiring when replacing an IC695CPU315 with the IC695CPU315-BB?
A: Yes. The IC695CPU315-BB is a direct revision upgrade within the RX3i CPU315 family. All field wiring connected to I/O modules in the IC695 backplane remains unchanged. Only the CPU slot is swapped.

Q: Do I need to rewrite my PLC program?
A: No full rewrite is required. Programs developed in Proficy Machine Edition for earlier IC695CPU315 revisions are fully compatible. You may need to update the hardware configuration target in ME to reflect the -BB hardware revision, then download the updated configuration to the new CPU.

Q: Is the IC695CPU315-BB compatible with Ethernet/IP and SRTP communications?
A: Yes. The IC695CPU315-BB supports SRTP (Service Request Transport Protocol), Modbus TCP, EtherNet/IP (adapter mode), and OPC DA via the embedded dual Ethernet ports. No additional communication modules are required for standard Ethernet-based SCADA or HMI connectivity.

Q: Can this CPU replace an IC695CPU310 in an existing RX3i rack?
A: Yes. The IC695CPU315-BB is backward compatible with the IC695CHS012 and IC695CHS016 backplanes used with the IC695CPU310. The higher memory and processing capacity of the -BB revision is fully backward compatible with existing I/O module configurations.

Q: What is the physical installation space requirement?
A: The IC695CPU315-BB occupies a single slot in the IC695 universal backplane. No additional slots are consumed. The module dimensions conform to the standard IC695 form factor, making it a direct physical replacement for any IC695 CPU module.

Q: How do I handle the transition from a Series 90-30 (IC693) system to the RX3i platform?
A: A Series 90-30 to RX3i migration requires a new IC695 backplane and power supply, as the IC693 and IC695 backplanes are not physically or electrically compatible. However, Genius Bus I/O blocks and field wiring can typically be retained by using a Genius Bus Controller module in the new RX3i rack, significantly reducing migration costs.

Warranty Assurance

Every IC695CPU315-BB unit supplied by TOPNLMS is covered by a 12-month replacement warranty from the date of shipment. Our pre-shipment inspection process includes power-on functional verification, firmware version confirmation, and physical inspection for connector integrity and module housing condition.

In the event of a warranty claim, TOPNLMS provides a direct replacement unit — no repair delays, no extended RMA cycles. Replacement units are dispatched within 3 business days of claim confirmation. Our technical support team is available to assist with installation verification, firmware compatibility questions, and commissioning guidance throughout the warranty period.

For procurement teams managing critical spare parts inventories, we offer multi-unit stocking orders with consolidated shipping and documentation packages including test reports, packing lists, and commercial invoices suitable for customs clearance in major industrial markets.

Stock availability is updated in real time. Orders placed before 16:00 CST on business days are processed for same-day dispatch from our Xiamen facility, with DHL Express, FedEx International Priority, and UPS Worldwide Expedited shipping options available.