GE EPSCPE100-ABAA Replacement for PACSystems RX3i

Product Overview

GE EPSCPE100-ABAA Replacement for PACSystems RX3i: Smooth Migration & Legacy System Upgrade

The GE EPSCPE100-ABAA is a high-performance CPU module designed for the GE PACSystems RX3i control platform. As legacy GE Series 90-30 and Series 90-70 systems approach end-of-life, and as discontinued Fanuc-era GE PLC hardware becomes increasingly difficult to source, the EPSCPE100-ABAA provides a validated, drop-in upgrade path that preserves existing I/O wiring infrastructure, retains compatibility with established communication protocols, and dramatically reduces the engineering overhead associated with full system replacement. Whether you are migrating from an aging IC693CPU374 or IC693CPU374-EJ, or transitioning from a Series 90-70 IC697CPX935 controller, the EPSCPE100-ABAA integrates into the Universal Backplane (IC695CHS012 or IC695CHS016) without requiring panel re-engineering or new cable harnesses.

For facilities running mixed-generation control architectures — where a Series 90-30 rack handles discrete I/O while a PACSystems RX3i backplane manages analog and high-speed counter functions — the EPSCPE100-ABAA serves as the central processing hub, coordinating data exchange across the backplane via the RX3i high-speed bus at up to 1 Gbps internal throughput. Its embedded Ethernet port supports SRTP, Modbus TCP, and EGD (Ethernet Global Data) protocols natively, meaning existing SCADA connections, HMI polling routines, and historian integrations built around a Cimplicity or iFIX supervisory layer can be preserved without protocol gateway hardware.

During retrofit projects, one of the most common engineering concerns is program portability. The EPSCPE100-ABAA is fully compatible with GE Proficy Machine Edition (PME) programming software, allowing ladder logic, function block diagrams, and structured text programs originally developed for earlier RX3i CPU variants — such as the IC695CPU310 or IC695CPU315 — to be imported, validated, and re-deployed with minimal modification. This significantly compresses commissioning timelines and reduces the risk of logic errors introduced during manual re-entry.

Physical installation is equally straightforward. The EPSCPE100-ABAA occupies a single CPU slot in any standard RX3i universal backplane and draws power from the system power supply module — typically an IC695PSA040 or IC695PSD040 — without requiring dedicated external power conditioning. For control cabinets with constrained DIN rail space, this single-slot form factor is a decisive advantage over multi-module CPU configurations found in older architectures. The module’s operating temperature range of 0–60°C and its compliance with IEC 61131-2 environmental standards make it suitable for deployment in both climate-controlled control rooms and harsher industrial enclosures.

Communication flexibility is a core strength of this upgrade path. Beyond the embedded Ethernet port, the EPSCPE100-ABAA supports optional expansion via RX3i communication modules such as the IC695ETM001 Ethernet interface or the IC695PBM300 PROFIBUS Master module, enabling integration with field devices, variable frequency drives, and remote I/O stations that communicate over PROFIBUS DP. For facilities with legacy DeviceNet or ControlNet infrastructure, protocol conversion can be handled at the field level without modifying the CPU configuration, preserving investments in existing field wiring and device parameterization.

Analog and discrete I/O compatibility is maintained through the RX3i mixed I/O module ecosystem. Existing IC694MDL655 discrete input modules, IC694MDL754 discrete output modules, and IC694ALG220 analog input modules installed in Series 90-30 expansion racks can be retained and connected to the RX3i backplane via the IC695LRE001 Local Expansion module, eliminating the need to replace field-proven I/O hardware during the CPU upgrade. This hybrid architecture — new CPU, retained I/O — is the most cost-effective migration strategy for brownfield automation projects where wiring replacement costs would otherwise dominate the project budget.

For applications requiring high-speed motion coordination or multi-axis servo control, the EPSCPE100-ABAA integrates with GE’s motion control ecosystem, including the IC695PMM335 Pulse Train Output module and compatible servo amplifier interfaces, supporting coordinated axis control without a separate motion controller. This consolidation reduces panel complexity and simplifies spare parts management — a critical consideration for maintenance teams responsible for keeping production lines operational across multiple shifts.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful migration to the EPSCPE100-ABAA rarely involves the CPU module in isolation. In practice, the upgrade is part of a broader system modernization effort that touches multiple layers of the control architecture. The IC695CHS016 universal backplane provides the physical foundation, accommodating the new CPU alongside retained communication and I/O modules in a single chassis. Power is supplied by the IC695PSA040 AC power supply module, which delivers regulated 5V and 3.3V rails to all backplane-mounted modules without requiring external DC conversion.

For facilities expanding their network connectivity during the migration, the IC695ETM001 Ethernet interface module adds a second Ethernet port, enabling simultaneous connection to both the plant SCADA network and an isolated engineering workstation network — a common requirement in process industries where network segmentation is mandated by cybersecurity policy. Where PROFIBUS DP field devices such as distributed I/O stations, variable frequency drives, or smart valve positioners are present, the IC695PBM300 PROFIBUS Master module integrates directly into the RX3i backplane, maintaining existing field device parameterization and eliminating the need for protocol gateways.

For remote I/O expansion beyond the main cabinet, the IC695LRE001 Local Expansion module bridges the RX3i backplane to legacy Series 90-30 I/O racks, allowing IC694MDL654 and IC694MDL754 discrete modules and IC694ALG220 analog input modules already installed in the field to remain in service. Programming and firmware updates are performed via the IC690USB901 USB-to-serial programming cable connected to the CPU’s serial port, or directly over Ethernet using Proficy Machine Edition’s online programming mode. For HMI integration, the EPSCPE100-ABAA communicates natively with GE QuickPanel+ operator terminals over Ethernet SRTP, preserving existing screen configurations and tag databases without requiring HMI software re-engineering.

Retrofit Guidance FAQ

Q: Can I reuse my existing field wiring when replacing an IC693CPU374 with the EPSCPE100-ABAA?
A: Yes. Field wiring connected to IC694-series discrete and analog I/O modules can be retained. The I/O modules themselves connect to the new RX3i backplane via the IC695LRE001 expansion interface, so terminal block wiring at the field device end does not need to be disturbed.

Q: Is my existing ladder logic program compatible with the EPSCPE100-ABAA?
A: Programs developed in VersaPro or earlier Proficy Machine Edition versions for IC695CPU310 or IC695CPU315 can be imported into the current PME environment and downloaded to the EPSCPE100-ABAA. Programs from Logicmaster 90 (Series 90-30) require conversion using GE’s migration utilities before import. Full functional validation on a test bench is recommended before live deployment.

Q: What communication protocols does the EPSCPE100-ABAA support natively?
A: The embedded Ethernet port supports SRTP (Service Request Transport Protocol), Modbus TCP (client and server), and EGD (Ethernet Global Data) for peer-to-peer data exchange. PROFIBUS DP, DeviceNet, and other fieldbus protocols require the corresponding communication module installed in the backplane.

Q: Will the EPSCPE100-ABAA fit in my existing control cabinet?
A: The module occupies one CPU slot in the IC695CHS012 (12-slot) or IC695CHS016 (16-slot) universal backplane. If you are replacing a Series 90-30 rack, the new backplane has a similar DIN rail mounting profile. Cabinet depth requirements are comparable to the legacy rack, though you should verify clearance for the Ethernet cable and any expansion modules.

Q: How do I handle the transition from SNP serial communications to Ethernet?
A: The EPSCPE100-ABAA retains a serial port for SNP/SNPX communications, allowing legacy programming adapters and serial HMI connections to remain operational during the transition period. Ethernet-based SRTP can be enabled simultaneously, allowing a phased migration of SCADA and HMI connections without a hard cutover.

Q: What is the recommended spare parts strategy during and after migration?
A: We recommend stocking at minimum one spare EPSCPE100-ABAA CPU module, one IC695PSA040 power supply, and the relevant I/O modules for your application. All units supplied by TOPNLMS are tested prior to shipment and covered by a 12-month warranty, reducing the risk associated with holding spare inventory.

Warranty Assurance

Every GE EPSCPE100-ABAA unit supplied by TOPNLMS is covered by a 12-month warranty from the date of shipment. Prior to dispatch, each module undergoes functional verification including power-on self-test, communication port validation, and visual inspection for physical integrity. Units that do not pass pre-shipment testing are not dispatched.

In the event of a warranty claim, TOPNLMS provides replacement unit dispatch within 3 business days of claim confirmation, minimizing production downtime. Our after-sales team is reachable via email at [email protected] or by phone at +86 18359293191 for technical support, RMA initiation, and procurement inquiries. We maintain stock of EPSCPE100-ABAA and related RX3i platform components to support rapid fulfillment for both planned procurement and emergency replacement scenarios.

For B2B customers with ongoing procurement requirements, volume pricing, consignment stock arrangements, and extended warranty options are available upon request. All units are shipped with documentation including test records and a certificate of conformity.

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