GE IC695CPK330 Replacement Solution for PACSystems RX3i

Product Overview

GE IC695CPK330 Replacement Solution for PACSystems RX3i: Smooth Transition from Legacy Hot Standby Systems

The GE IC695CPK330 is a Hot Standby CPU Redundancy Kit designed for the PACSystems RX3i platform — one of the most widely deployed redundant PLC architectures in process control, power generation, oil & gas, and critical infrastructure applications. As GE Automation (now Emerson Automation Solutions) continues to evolve its product roadmap, many facilities running legacy IC695CPK330 configurations face the challenge of sourcing replacement units, managing end-of-life spares, or executing a controlled migration to current-generation hardware without disrupting continuous operations.

This listing provides a verified replacement IC695CPK330 module, fully tested and ready for drop-in installation into existing PACSystems RX3i racks. Whether you are replacing a failed unit, building a cold-standby spare inventory, or executing a phased system modernization, this solution is engineered to minimize engineering rework and eliminate unplanned downtime.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful IC695CPK330 hot standby migration involves more than swapping the CPU kit. In practice, field engineers working on PACSystems RX3i redundancy upgrades typically address several interconnected components in the same project scope.

On the backplane side, the IC695CHS016 16-slot universal backplane is the standard chassis for full redundancy configurations, providing sufficient slot density to house the CPU kit alongside dedicated communication and I/O modules without requiring cabinet expansion. For installations where the existing rack is an older IC694 Series 90-70 chassis, a rack migration to the RX3i universal backplane is a prerequisite — this is a planned, one-time change that unlocks the full redundancy capability of the IC695CPK330.

Power integrity is critical in hot standby systems. The IC695PSA040 40-watt AC power supply or the IC695PSD040 DC variant should be verified for adequate load capacity when adding the redundancy sync module to the rack. In high-availability installations, dual power supplies with the IC695PSD040 in a redundant power configuration are strongly recommended to eliminate the power supply as a single point of failure.

On the communications side, the IC695ETM001 Ethernet transmitter module handles SRTP and Modbus TCP traffic between the PACSystems RX3i controller and SCADA or DCS host systems. In redundancy configurations, both the primary and secondary CPUs must have independent Ethernet paths — a detail that often requires adding a second IC695ETM001 to the secondary rack. For legacy installations still using the IC695CMM004 serial communications module for Modbus RTU or DNP3 links to field devices, these modules remain fully compatible with the IC695CPK330 and do not require replacement during the CPU upgrade.

I/O continuity is one of the strongest arguments for staying within the PACSystems RX3i ecosystem. Existing IC694MDL754 discrete output modules, IC694ALG220 analog input modules, and IC695ALG600 universal analog I/O modules all retain full compatibility with the IC695CPK330 — no rewiring, no I/O map changes, and no signal conditioning modifications are required. This dramatically reduces the field labor component of the migration and allows the upgrade to be executed during a planned maintenance window rather than a full plant shutdown.

For facilities that also operate GE Proficy HMI/SCADA — iFIX or CIMPLICITY — the existing OPC or SRTP data connections to the PACSystems RX3i controller are preserved after the CPU kit replacement. The redundancy switchover is transparent to the SCADA layer, which is a key operational advantage of the IC695CPK330 hot standby architecture versus a cold-standby or manual failover approach.

Finally, for commissioning and firmware management, a Proficy Machine Edition programming cable (USB-to-serial or direct Ethernet) and a licensed PME engineering workstation are required to perform the redundancy configuration, sync verification, and switchover testing that GE’s commissioning procedure mandates before returning the system to production.

Retrofit Guidance FAQ

Q: Can I replace only the failed CPU module without replacing the entire IC695CPK330 kit?
A: The IC695CPK330 is a kit that includes the IC695CPU330 CPU module and the redundancy synchronization hardware. If only the CPU module has failed, it is possible to source the IC695CPU330 individually; however, replacing the complete kit ensures firmware revision matching between the CPU and sync hardware, which GE recommends for reliable hot standby operation.

Q: Will my existing ladder logic and function block programs run without modification?
A: In most cases, yes. Programs developed in Proficy Machine Edition for the IC695CPU310 or IC695CPU315 are compatible with the IC695CPU330 after a target type change in PME. Redundancy-specific configuration blocks (REDUND_INFO, switchover logic) must be added or verified. A full offline simulation and hardware-in-the-loop test is recommended before live cutover.

Q: Does the IC695CPK330 support the same Ethernet IP addresses as the unit it replaces?
A: Yes. IP address configuration is stored in the PME project and downloaded to the module. The replacement unit will assume the same network identity after project download, requiring no changes to SCADA, historian, or remote I/O network configurations.

Q: How much cabinet space does the redundancy kit require compared to a single CPU installation?
A: The IC695CPK330 occupies the same number of rack slots as a standard IC695CPU330 single CPU installation. The redundancy sync link uses a dedicated fiber or copper cable between the primary and secondary racks — no additional slot space is consumed. Secondary rack requirements mirror the primary rack configuration.

Q: What is the switchover time in a hot standby configuration?
A: The IC695CPK330 hot standby architecture achieves bumpless switchover with a typical transfer time of less than one CPU scan cycle, which is under 10 milliseconds for most application programs. This meets the requirements of most process control and power distribution applications where output continuity during CPU failure is mandatory.

Q: Is the IC695CPK330 compatible with PROFINET or EtherNet/IP I/O?
A: The IC695CPU330 supports EtherNet/IP scanner functionality via the IC695ETM001 module. PROFINET I/O is not natively supported on the RX3i platform; installations requiring PROFINET connectivity should evaluate the use of protocol gateways or consider the PACSystems RSTi-EP platform for new builds.

Warranty Assurance

Every IC695CPK330 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of shipment. Prior to dispatch, each module undergoes a multi-point functional verification process that includes power-on self-test confirmation, communication port integrity check, and firmware version documentation. Units are shipped in anti-static packaging with individual serial number records retained for warranty tracking.

In the event of a warranty claim, TOPNLMS provides a replacement-first policy: a verified replacement unit is dispatched before the failed module is returned, minimizing the impact on your production schedule. Our technical support team is available to assist with installation verification, PME configuration questions, and switchover testing guidance throughout the warranty period.

For urgent requirements — including same-day quotation, express international shipping, and emergency spare sourcing — contact our industrial automation team directly. We maintain stock of PACSystems RX3i components including CPU modules, power supplies, communication modules, and I/O modules to support rapid deployment across Asia-Pacific, the Middle East, and global project sites.

All units are sourced through verified supply channels. Certificates of conformance and test reports are available upon request for quality-critical procurement processes.