GE PACSystems RX3i Modules: IC695ACC302 Auxiliary Smart Battery Module —

Technical Dossier

Product Details And Specifications

GE PACSystems RX3i Series: Comprehensive Module Range and Technical Overview

The GE PACSystems RX3i platform is one of the most widely deployed programmable automation controller (PAC) architectures in global heavy industry. Installed across petrochemical complexes, nuclear power stations, offshore oil & gas platforms, and continuous-process refineries, the RX3i backplane-based architecture provides deterministic real-time control with a scalable I/O footprint. Its universal backplane accepts both legacy Series 90-30 I/O modules and native RX3i high-speed modules, making it the preferred migration target for facilities retiring GE Series 90-70 and Series 90-30 controllers without full system replacement. The IC695ACC302 Auxiliary Smart Battery Module is a critical power-continuity component within this ecosystem, providing backup energy storage for CPU memory retention during unplanned power interruptions.

The Evolution of PACSystems RX3i Architecture

GE introduced the PACSystems RX3i platform in the early 2000s as a successor to the Series 90-70 and Series 90-30 families. The RX3i retained backward compatibility with Series 90-30 I/O modules via a dedicated compatibility backplane, enabling phased migration strategies across long-lifecycle industrial facilities. The original CPU modules (IC695CPU310, IC695CPU315) used a 300 MHz processor core. Subsequent generations introduced dual-core CPUs (IC695CPU320, IC695CPU330) with expanded memory maps and Ethernet-embedded ports, eliminating the need for separate ENIU modules in many topologies. The introduction of the IC695CPE302 and IC695CPE330 embedded Ethernet CPUs marked the transition to IEC 61131-3 multi-language programming with integrated web diagnostics. Battery management evolved in parallel: early designs relied on single-cell CR2032 holders, while the IC695ACC302 Auxiliary Smart Battery Module introduced intelligent charge monitoring and hot-swap capability, extending mean time between maintenance interventions. The platform is currently in a mature/sustained phase; GE Vernova continues to supply spare parts and firmware updates, but new feature development is concentrated on the CPE400/CPL410 series with Linux-based runtime environments.

PACSystems RX3i Full Catalog & Functionalities (SKU List)

CPU & Controller Modules

• IC695CPU310: 300 MHz single-core CPU, 10 MB user memory, no embedded Ethernet
• IC695CPU315: 300 MHz CPU, 64 MB user memory, expanded data table capacity
• IC695CPU320: Dual-core CPU, 64 MB memory, supports motion and process control tasks
• IC695CPU330: High-performance dual-core, 128 MB user memory, redundancy-ready
• IC695CPE302: Embedded dual-port Ethernet CPU, 64 MB memory, web server diagnostics
• IC695CPE330: Embedded Ethernet CPU, 128 MB memory, IEC 61131-3 multi-language runtime
• IC695CPE400: Linux-based PAC CPU, 1 GB memory, supports C/C++ user programs

Power Supply Modules

• IC695PSA040: 40W AC/DC power supply, 120/240 VAC input, universal backplane compatible
• IC695PSD040: 40W DC power supply, 24 VDC input, DIN-rail mountable variant
• IC695PSA140: 140W high-capacity AC power supply for large I/O configurations

Battery & Auxiliary Modules

• IC695ACC302: Auxiliary Smart Battery Module, hot-swap capable, intelligent charge status monitoring, CPU memory retention backup
• IC695ACC300: Standard battery module, non-smart, single-cell lithium backup for CPU RAM

Analog I/O Modules

• IC695ALG600: 8-channel universal analog input, configurable per channel for voltage/current/RTD/thermocouple
• IC695ALG608: 8-channel analog input, 16-bit resolution, high-speed scanning
• IC695ALG704: 4-channel analog output, 16-bit resolution, 0–20 mA / ±10 V selectable
• IC695ALG728: 8-channel analog output module, isolated outputs, process control applications

Digital I/O Modules

• IC695MDL654: 16-point 24 VDC discrete input module, positive logic
• IC695MDL664: 16-point 24 VDC discrete output module, 0.5A per point
• IC695MDL740: 32-point 24 VDC discrete output, high-density, source type
• IC695MDL752: 32-point 24 VDC discrete input, high-density, IEC-compliant

Communications & Network Adapter Modules

• IC695ETM001: Ethernet interface module, 10/100 Mbps, SRTP/Modbus TCP support
• IC695PBM300: PROFIBUS DP master module, up to 125 slave devices
• IC695CMM002: Serial communications module, 2-port RS-232/RS-485, Modbus RTU/ASCII

Sourcing Hard-to-Find & Obsolete PACSystems RX3i Parts

DriveKNMS maintains a dedicated inventory program for PACSystems RX3i components that have transitioned to limited-availability or end-of-active-production status. For facilities operating RX3i systems under 10–25 year maintenance contracts — common in nuclear, refining, and municipal water treatment applications — sourcing IC695-series modules through standard distribution channels becomes progressively unreliable as production volumes decline. DriveKNMS sources IC695 modules through certified secondary-market channels, including decommissioned plant buybacks, OEM overstock liquidations, and authorized repair-and-return programs. All units are serialized, photographed, and logged against a traceability database prior to dispatch. For obsolete CPU variants such as the IC695CPU310 and IC695CPU315, DriveKNMS provides firmware-matched replacements to ensure compatibility with existing ladder logic and function block programs without requiring re-commissioning. Customers requiring long-term supply agreements (LTSAs) for RX3i spare parts are invited to contact the procurement team directly.

Quality Control for the PACSystems RX3i Range

PACSystems RX3i modules present specific test challenges due to their high-speed VME-derived backplane bus and the tight timing tolerances of the CPU-to-I/O scan cycle. DriveKNMS applies a multi-stage verification protocol to all RX3i inventory. Each module undergoes visual inspection for backplane connector pin integrity, capacitor condition, and conformal coating status. Functional testing is performed on a live RX3i rack using a reference CPU at the firmware revision specified by the customer. For CPU modules, memory retention is validated across a simulated power-cycle sequence of no fewer than 50 cycles. Battery modules including the IC695ACC302 are tested for charge acceptance, discharge curve linearity, and smart-communication handshake with the host CPU. Analog modules are calibrated against a NIST-traceable reference standard with full channel-by-channel offset and gain verification. Test records are retained for a minimum of five years and are available to customers upon request.