GE IC695ACC402 Replacement for PACSystems RX3i

Product Overview

GE IC695ACC402 Replacement for PACSystems RX3i: Smooth Transition & Legacy System Upgrade

The GE IC695ACC402 is the dedicated CPU Memory Backup Module for the GE PACSystems RX3i control platform. As industrial facilities worldwide accelerate the retirement of aging Series 90-30 and Series 90-70 PLCs, the IC695ACC402 has become a critical component in migration projects that demand zero-compromise compatibility with existing RX3i CPU modules such as the IC695CPU310, IC695CPU315, and IC695CPU320. Whether you are executing a planned modernization or responding to an urgent end-of-life parts shortage, this module provides a seamless, drop-in upgrade path that preserves your existing program logic, retains CPU configuration data across power cycles, and eliminates the risk of data loss during unplanned shutdowns.

The IC695ACC402 mounts directly onto compatible RX3i CPUs and requires no additional rack slot, making it ideal for control cabinets where DIN-rail space and backplane slots are already at a premium. Its compact form factor integrates without modification to existing wiring harnesses or terminal blocks — a decisive advantage when minimizing downtime during a live-system retrofit. The module uses a built-in supercapacitor to maintain CPU memory content during power interruptions, eliminating the need for lithium battery replacement cycles that are common pain points in older GE Series 90-30 CPU modules such as the IC693ACC301 and IC693ACC302.

For facilities transitioning from legacy Series 90-30 racks, the IC695ACC402 is typically deployed as part of a broader platform migration. Engineers evaluating the RX3i backplane power budget will first assess the IC695PSD040 or IC695PSA040 power supply modules to confirm adequate headroom for the CPU and its accessories. The IC695CHS012 or IC695CHS016 rack chassis provides the physical backplane into which the upgraded CPU — fitted with the IC695ACC402 — is installed, while existing field wiring to terminal blocks and marshalling panels remains untouched.

Communication protocol migration is a parallel workstream in most RX3i upgrade projects. Sites transitioning from legacy SNP or DF1 serial networks to EtherNet/IP or Modbus TCP will typically install the IC695ETM001 Ethernet communications module alongside the IC695ACC402 as part of the same maintenance window. This combination replaces the functionality previously handled by a standalone IC693CMM321 communications module on Series 90-30 systems. For installations that retain legacy serial field devices, the IC695CMM002 serial communications module provides RS-232/RS-485 connectivity without requiring changes to existing device configurations or baud-rate settings.

I/O continuity is equally important during migration. Discrete I/O modules such as the IC694MDL655 and IC694MDL754 are compatible with the RX3i backplane, allowing field wiring to remain in place while the control platform is upgraded. Analog signal chains using the IC695ALG600 or IC695ALG616 analog input modules are similarly preserved, which is critical in process industries where re-calibration of transmitters and sensors represents significant downtime cost and engineering effort.

HMI integration is a common parallel workstream. Facilities replacing aging QuickPanel or CIMPLICITY terminals with modern HMI platforms benefit from the RX3i’s native EtherNet/IP support, which the IC695ACC402-equipped CPU handles without additional gateway hardware. Programming and commissioning of the upgraded system is performed via Proficy Machine Edition, connecting through the IC695ETM001 or a USB programming cable, with the IC695ACC402 ensuring that all validated program logic is retained even if power is interrupted during the commissioning process.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful RX3i migration rarely involves a single component. In practice, the IC695ACC402 is deployed as part of a coordinated upgrade that spans power, communications, I/O, and HMI layers. The following components are commonly specified alongside the IC695ACC402 in migration bills of materials:

• IC695PSD040 / IC695PSA040 — RX3i power supply modules; evaluated first to confirm backplane power budget for the upgraded CPU and accessories.
• IC695ETM001 — Ethernet communications module; replaces IC693CMM321 and enables SRTP, Modbus TCP, and EtherNet/IP on the upgraded platform.
• IC695CMM002 — Serial communications module; retains RS-232/RS-485 connectivity for legacy field devices without configuration changes.
• IC695CHS012 / IC695CHS016 — RX3i rack chassis; provides the backplane into which the upgraded CPU and I/O modules are installed.
• IC694MDL655 / IC694MDL754 — Discrete I/O modules; compatible with RX3i backplane, preserving existing field wiring.
• IC695ALG600 / IC695ALG616 — Analog input modules; retained from Series 90-30 installations to avoid sensor re-calibration.

Sourcing these components from a single supplier — with consolidated testing, documentation, and warranty coverage — significantly reduces project coordination overhead and commissioning risk.

Retrofit Guidance FAQ

Q: Do I need to re-download my PLC program after installing the IC695ACC402?
A: No. The IC695ACC402 preserves CPU memory content across power cycles. Once installed on a compatible RX3i CPU, existing program logic and configuration data are retained without requiring a fresh download from Proficy Machine Edition.

Q: Is the IC695ACC402 compatible with all RX3i CPU firmware versions?
A: The module is compatible with IC695CPU310, IC695CPU315, and IC695CPU320 CPUs running current GE PACSystems firmware. Verify your CPU firmware revision against the GE PACSystems RX3i Hardware Reference Manual prior to installation.

Q: Will I need to modify my control cabinet wiring?
A: No additional wiring is required. The IC695ACC402 draws power directly from the CPU module connector. Existing terminal block layouts, cable trays, and marshalling wiring are unaffected.

Q: Can the IC695ACC402 replace the IC693ACC301 battery backup used in Series 90-30 systems?
A: The IC695ACC402 is the RX3i-platform equivalent and serves the same functional role — CPU memory retention during power loss — but it is not a physical plug-in replacement for IC693ACC301. It is used as part of a CPU-level migration from Series 90-30 to RX3i.

Q: What communication protocols does the upgraded RX3i system support after this migration?
A: The RX3i platform natively supports SRTP, Modbus TCP, EtherNet/IP, and serial protocols (RS-232/RS-485 via IC695CMM002). This represents a significant protocol upgrade over legacy Series 90-30 SNP/SRTP-only configurations.

Q: How is physical installation space managed in an existing control cabinet?
A: The IC695ACC402 attaches directly to the CPU module and does not occupy a separate backplane slot, making it suitable for fully populated IC695CHS012 or IC695CHS016 racks where slot availability is constrained.

Q: What programming software is used to commission the upgraded system?
A: Proficy Machine Edition is the standard programming environment for PACSystems RX3i. Connection is established via the IC695ETM001 Ethernet module or a USB programming cable. The IC695ACC402 ensures program retention throughout the commissioning process, including during any power interruptions.

Warranty Assurance

Every GE IC695ACC402 unit shipped by TOPNLMS is covered by a 12-Month Warranty from the date of delivery. Prior to dispatch, each module undergoes functional verification including power-on self-test and memory retention validation to confirm the supercapacitor charge circuit is operating within specification. Units that do not pass outgoing inspection are not shipped.

In the event of a confirmed defect within the warranty period, TOPNLMS provides direct replacement support with priority processing for customers in active production environments. Our technical team is available to assist with installation verification, compatibility confirmation, and commissioning guidance via email and phone. Typical response time for warranty and technical inquiries is within one business day.

Stock is maintained in Xiamen, China, with express international shipping options available to minimize lead time for urgent replacement requirements. Customers requiring expedited dispatch should contact our sales team directly to confirm availability and arrange same-day or next-day shipment scheduling.

For volume procurement, OEM supply agreements, or project-based sourcing of RX3i platform components, TOPNLMS offers consolidated quotation services covering CPUs, I/O modules, power supplies, communications modules, and accessories from a single source.

© 2026 TOPNLMS. All rights reserved.
Original Source: https://topnlms.com
Contact: [email protected] | +86 18359293191