GE Series 90-70 IC697 Modules

Technical Dossier

Product Details And Specifications

GE Series 90-70 IC697 Series: Comprehensive Module Range and Technical Overview

The GE Series 90-70 (IC697 prefix) is a rack-based programmable logic controller platform developed by GE Fanuc Automation, designed for high-availability process control in heavy industrial environments including petrochemical refineries, nuclear power stations, offshore platforms, and large-scale manufacturing facilities. Introduced in the late 1980s and deployed globally through the 1990s and 2000s, the Series 90-70 established itself as a backbone controller in distributed control architectures where deterministic scan times, hot-standby redundancy, and broad I/O density were mandatory requirements. Installed base counts in the tens of thousands of racks across North America, Europe, and Asia-Pacific, making long-term spare parts availability a critical operational concern for plant engineers and maintenance managers.

The Evolution of IC697 Architecture

The IC697 platform launched with the VMEbus-based Series 90-70 backplane, supporting up to 21 slots per rack and a high-speed proprietary I/O bus operating at 10 Mbps. Early CPU modules (IC697CPU731, IC697CPU771) used Motorola 68000-series processors with battery-backed CMOS RAM. The architecture evolved through three distinct generations: the original 90-70 base platform (1988–1995), the enhanced CPU generation with floating-point co-processors and expanded memory (1995–2003), and the final production phase featuring Ethernet-native CPUs and Genius Bus integration (2003–2012). GE Fanuc was subsequently rebranded as GE Intelligent Platforms, and the Series 90-70 line reached end-of-active-production around 2015, transitioning customers toward the PACSystems RX7i platform — which maintains physical and logical backward compatibility with IC697 I/O modules and racks, allowing phased migration without full system replacement. This compatibility window is the primary reason IC697 spare parts remain in active procurement demand.

IC697 Full Catalog & Functionalities (SKU List)

Discrete Input Modules

• IC697MDL250: 32-channel 24VDC discrete input module, isolated, 0.5ms filter time
• IC697MDL240: 16-channel 120VAC discrete input module, optical isolation
• IC697MDL241: 16-channel 240VAC discrete input module, high-voltage isolated inputs
• IC697MDL253: 32-channel 48VDC discrete input module, group isolated
• IC697MDL254: 32-channel TTL-level discrete input module, 5VDC logic

Discrete Output Modules

• IC697MDL340: 16-channel 120VAC discrete output module, 2A per point, triac output
• IC697MDL341: 16-channel 240VAC discrete output module, relay-isolated outputs
• IC697MDL350: 32-channel 24VDC discrete output module, 0.5A per point, sourcing
• IC697MDL753: 32-channel relay output module, Form C contacts, 2A per point

Analog Input / Output Modules

• IC697ALG230: 16-channel analog input module, 4–20mA / 0–10V, 12-bit resolution
• IC697ALG320: 8-channel analog output module, 4–20mA, 12-bit DAC
• IC697ALG440: 16-channel analog input module, thermocouple/RTD, 16-bit resolution

CPU Modules

• IC697CPU731: Series 90-70 CPU, 512KB user memory, 0.8ms/K scan time
• IC697CPU771: Enhanced CPU, 2MB user memory, floating-point math co-processor
• IC697CPU781: High-performance CPU, 4MB user memory, Ethernet-ready

Power Supply Modules

• IC697PWR710: 120/240VAC input power supply, 30W output, rack-mount
• IC697PWR724: 24VDC input power supply, 30W, for DC-powered installations

Communications & Bus Adapters

• IC697BEM711: Genius Bus Controller, supports up to 32 Genius devices per bus
• IC697CMM711: Serial communications module, RS-232/RS-422/RS-485, multi-protocol
• IC697CMM742: Ethernet TCP/IP communications module, 10BaseT

Sourcing Hard-to-Find & Obsolete IC697 Parts

The IC697 series reached end-of-active-production status, meaning GE (now Emerson Automation Solutions following the GE Intelligent Platforms divestiture) no longer manufactures new units. Plant operators running Series 90-70 systems face a defined set of procurement challenges: OEM new-old-stock (NOS) depletion, counterfeit module risk in the secondary market, and the absence of factory repair services for discontinued part numbers. DriveKNMS maintains a dedicated inventory of IC697 modules sourced from decommissioned plant equipment, verified OEM overstock, and controlled refurbishment pipelines. All IC697 units in stock are cataloged by firmware revision where applicable, and cross-referenced against known hardware revision compatibility matrices to prevent backplane bus conflicts. For end-users requiring long-term maintenance agreements covering IC697 spare parts allocation, DriveKNMS offers reserved-stock programs with guaranteed lead times.

Quality Control for the IC697 Range

IC697 modules present specific test challenges due to their VMEbus backplane architecture and proprietary GE Fanuc I/O bus protocol. DriveKNMS employs a dedicated Series 90-70 test rack with functional CPU, power supply, and bus termination to perform live operational verification on all IC697 I/O modules prior to shipment. Test procedures include: discrete I/O point-by-point channel verification under rated voltage and load conditions; analog module calibration verification against NIST-traceable reference instruments; CPU module memory test, battery circuit check, and program load/execute cycle; communications module protocol handshake and data integrity testing; and power supply output voltage regulation and ripple measurement under full rated load. Modules exhibiting any channel failure, calibration drift exceeding ±0.1% of full scale, or communication errors are quarantined and not offered for sale. Each shipped unit is accompanied by a test record identifying the technician, test date, and pass criteria met.