GE Series 90-30 IC694 Modules — IC694PWR321B Power Supply

Technical Dossier

Product Details And Specifications

GE Series 90-30 IC694 Series: Comprehensive Module Range and Technical Overview

The GE Series 90-30 (IC694 platform) is one of the most widely deployed programmable logic controller families in global heavy industry. Installed across petrochemical complexes, nuclear power auxiliary systems, refinery distributed control architectures, and continuous-process manufacturing plants, the Series 90-30 established a benchmark for modular, rack-based PLC design throughout the 1990s and 2000s. Its backplane bus architecture supports mixed I/O configurations across a single rack, enabling engineers to build compact yet scalable control nodes without dedicated communication bridges. The IC694 designation specifically identifies the standard-voltage, rack-mount variant of the Series 90-30 family, distinguishing it from the IC693 (earlier revision) and IC695 (RX3i, next-generation) platforms. Facilities running Series 90-30 infrastructure represent a significant installed base that continues to require original-specification spare parts for maintenance, emergency replacement, and lifecycle extension programs.

The Evolution of IC694 Architecture

The Series 90-30 architecture was introduced by GE Fanuc Automation in the early 1990s as a successor to the Series Six and Series Five PLC families. The original IC693 platform established the physical rack format and I/O bus protocol. The IC694 revision introduced enhanced CPU processing speeds, expanded memory addressing, and improved noise immunity on the backplane, while maintaining backward physical compatibility with IC693 racks and most I/O modules — a critical design decision that protected existing plant wiring investments.

Through the late 1990s, GE Fanuc expanded the IC694 catalog with high-density I/O modules, specialty function modules (motion, PID, communications), and redundant CPU configurations. The platform reached peak deployment circa 2000–2008. Following GE's acquisition of Fanuc's automation division stake and subsequent rebranding to GE Intelligent Platforms (later GE Automation & Controls), the Series 90-30 entered a managed lifecycle phase. The IC695 RX3i platform was introduced as the strategic successor, offering a PCI-based backplane, higher-speed CPUs, and Ethernet-native communications — while maintaining a software migration path from Series 90-30 via Proficy Machine Edition.

As of 2026, the IC694 series is in end-of-life / last-time-buy status for most modules. New production has ceased for the majority of catalog numbers. Plants operating this platform must source replacement modules from authorized distributors, certified repair facilities, or specialist spare-parts suppliers maintaining bonded inventory of tested, pull-from-service units.

IC694 Full Catalog & Functionalities (SKU List)

The following catalog numbers represent verified, commonly deployed IC694 series modules. Each entry reflects the module's primary function within a Series 90-30 rack configuration.

Power Supply Modules

• IC694PWR321B: 120/240VAC input, 30W rack power supply, standard Series 90-30 baseplate
• IC694PWR330D: 24VDC input, 30W isolated power supply for DC-powered panels
• IC694PWR331D: 24VDC input, high-capacity 40W power supply, extended I/O rack support

CPU Modules

• IC694CPU310: Entry-level CPU, 6K logic program memory, Series 90-30 base controller
• IC694CPU311: Mid-range CPU, 12K program memory, expanded register table
• IC694CPU313: Enhanced CPU, 80K program memory, floating-point math support
• IC694CPU323: High-performance CPU, 240K program memory, Ethernet-ready via slot module
• IC694CPU364: Embedded Ethernet CPU, 240K program memory, onboard 10/100 Ethernet port
• IC694CPU374: Top-tier Series 90-30 CPU, 512K program memory, dual Ethernet, hot-standby redundancy capable

Discrete Input Modules

• IC694MDL230: 8-point 120VAC discrete input module
• IC694MDL240: 16-point 120VAC discrete input module, standard density
• IC694MDL241: 16-point 24VDC positive-logic discrete input module
• IC694MDL260: 32-point 24VDC discrete input, high-density I/O expansion

Discrete Output Modules

• IC694MDL330: 8-point 120VAC relay output module, 2A per point
• IC694MDL340: 16-point 120VAC discrete output module
• IC694MDL754: 32-point 24VDC transistor output, high-density sourcing

Analog I/O Modules

• IC694ALG220: 4-channel analog voltage/current input, 12-bit resolution
• IC694ALG221: 4-channel analog current input, 4–20mA, isolated
• IC694ALG390: 4-channel analog output, voltage/current configurable
• IC694ALG391: 8-channel analog output, high-channel-count process control

Communications & Specialty Modules

• IC694CMM302: Serial communications module, RS-232/RS-485, ASCII/RTU/SNP protocols
• IC694CMM321: Ethernet interface module, 10BaseT, legacy network integration
• IC694DSM314: 4-axis motion control module, stepper/servo positioning
• IC694APU300: High-speed counter / pulse accumulator module

Sourcing Hard-to-Find & Obsolete IC694 Parts

DriveKNMS maintains a dedicated inventory program for end-of-life GE Series 90-30 / IC694 components. As OEM production has ceased across the majority of this catalog, procurement teams at refineries, utilities, and process plants face extended lead times or outright unavailability through standard distribution channels. DriveKNMS addresses this through three sourcing mechanisms: bonded new-surplus stock acquired during OEM last-time-buy windows; certified pull-from-service units recovered from decommissioned control panels and subjected to full functional testing; and component-level repair of failed modules where replacement parts remain available.

For critical spares programs, DriveKNMS can provide multi-unit lot pricing, consignment inventory arrangements, and documented traceability records suitable for regulated industries including nuclear auxiliary systems and pharmaceutical manufacturing. Customers operating under IEC 61511 or ISA-84 functional safety frameworks can request test documentation packages for safety-instrumented system (SIS) spare parts.

Quality Control for the IC694 Range

IC694 modules present specific test challenges due to their backplane bus architecture and mixed-signal I/O designs. DriveKNMS applies a structured verification protocol to all IC694 units prior to shipment. Power supply modules (including IC694PWR321B) are load-tested at rated wattage across the full input voltage range, with output ripple measured against OEM specifications. CPU modules undergo full program load/execute cycles using Proficy Machine Edition test routines, with memory integrity verified across all addressable registers. Discrete I/O modules are point-tested under rated voltage and current conditions. Analog modules are calibrated against traceable reference standards with linearity and offset error recorded in the test report. Communications modules are verified for protocol handshake and data integrity on live network segments. All units are inspected for capacitor condition, connector integrity, and conformal coating status before release.