GE Series 90-70 8750 Modules

Technical Dossier

Product Details And Specifications

GE Fanuc Series 90-70 8750 Series: Comprehensive Module Range and Technical Overview

The GE Fanuc Series 90-70 (also referenced under the 8750 module family) is a rack-based programmable logic controller platform that has maintained a dominant installed base across global heavy industry sectors including petrochemical refineries, nuclear power generation facilities, offshore oil & gas platforms, and continuous-process chemical plants. Introduced in the late 1980s and expanded through the 1990s, the Series 90-70 architecture established GE Fanuc as a tier-one DCS/PLC supplier in North America, Europe, and Asia-Pacific. Its VMEbus-based backplane, deterministic scan cycle, and broad I/O density made it the preferred control platform for large-scale process automation where uptime requirements exceed 99.9%. Thousands of units remain in active service as of 2026, making lifecycle parts sourcing a critical operational requirement for plant maintenance engineers worldwide.

The Evolution of Series 90-70 Architecture

The Series 90-70 platform was architected around the VME (Versa Module Eurocard) bus standard, providing a 32-bit parallel backplane that supported high-speed data exchange between CPU, I/O, and communications modules. Early revisions (circa 1988–1993) used the IC697 module numbering convention, establishing the foundational CPU and I/O card families. The 8750-series designation emerged as GE Fanuc standardized its catalog for OEM and system integrator channels, with the 8750-CA-NS representing a specific I/O board variant within this taxonomy.

Through the mid-1990s, GE Fanuc introduced enhanced CPU modules with expanded memory and faster scan rates, alongside high-density analog and discrete I/O cards to address growing process complexity. The platform's compatibility layer was carefully maintained across hardware revisions, allowing IC697 and 8750-series modules to coexist within the same rack in most configurations. By the early 2000s, GE Fanuc transitioned its primary development focus to the PACSystems RX7i platform — which uses a physically compatible VME rack but runs a different firmware architecture — effectively placing the Series 90-70 into a maintenance-only lifecycle phase. Facilities that standardized on Series 90-70 in the 1990s now face a mature spare parts market where new manufacture has ceased and refurbished/tested inventory is the primary supply channel.

Series 90-70 / 8750 Full Catalog & Functionalities (SKU List)

The following SKUs represent the core module families within the GE Fanuc Series 90-70 / 8750 platform. Each entry reflects a verified, commonly stocked part category.

CPU & Controller Modules

• IC697CPX935: Series 90-70 CPU, 32-bit, 512KB user memory, Ethernet-ready
• IC697CPU772: High-performance CPU module, floating-point math, 256KB RAM
• IC697CPU781: Standard CPU, 80MHz processor, 128KB configurable memory
• IC697CPU788: Enhanced CPU with expanded I/O scan capacity, 1MB memory

Discrete Input Modules

• IC697MDL340: 32-point 24VDC discrete input module, sink/source compatible
• IC697MDL341: 16-point 120VAC discrete input, isolated, DIN rail mountable
• IC697MDL653: 32-point 24VDC positive logic input, high-density rack format
• 8750-CA-NS: I/O board module, NS-series backplane interface, rack-mount format — the subject SKU of this listing

Discrete Output Modules

• IC697MDL940: 32-point relay output module, 2A per point, Form C contacts
• IC697MDL753: 32-point 24VDC transistor output, source type, 0.5A per point
• IC697MDL254: 16-point 120VAC triac output, zero-crossing switching

Analog I/O Modules

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

Communications & Network Adapters

• IC697CMM742: Ethernet TCP/IP communications module, 10BaseT, SRTP protocol
• IC697CMM711: Serial communications module, RS-232/RS-485, Modbus RTU/ASCII
• IC697BEM731: Genius Bus Controller, supports up to 32 Genius I/O blocks

Power Supply Modules

• IC697PWR711: 120/240VAC input power supply, 30W output, rack-mount
• IC697PWR724: 24VDC input power supply, redundancy-capable, 40W

Sourcing Hard-to-Find & Obsolete Series 90-70 / 8750 Parts

GE Fanuc formally discontinued new manufacture of Series 90-70 hardware in the mid-2010s. PACSystems RX7i is the designated migration path; however, the capital cost and engineering effort required for a full platform migration is prohibitive for many operating facilities, particularly those with validated control system configurations in regulated industries (nuclear, pharmaceutical, refining). DriveKNMS maintains a dedicated inventory of tested Series 90-70 and 8750-series modules sourced from decommissioned plant equipment, authorized surplus channels, and controlled refurbishment programs. For the 8750-CA-NS specifically, stock availability is verified prior to quotation. All obsolete modules are cross-referenced against GE Fanuc revision histories to ensure firmware and hardware compatibility with the target rack configuration. Customers requiring long-term supply agreements for multi-year maintenance contracts are accommodated with reserved stock allocation upon request.

Quality Control for the Series 90-70 / 8750 Range

Series 90-70 modules present specific test challenges due to their VMEbus backplane architecture and the age-related failure modes common to hardware manufactured between 1988 and 2005. DriveKNMS applies a structured test protocol to all 8750-series and IC697-series modules prior to shipment. Each module undergoes visual inspection for capacitor degradation, PCB trace corrosion, and connector pin integrity. Functional testing is performed in a live Series 90-70 rack using GE Fanuc Logicmaster 90 or Proficy Machine Edition software to verify I/O point operation, backplane communication handshake, and module self-diagnostics. Analog modules are calibrated against traceable reference standards. Communications modules are tested for full protocol stack operation including Ethernet SRTP session establishment and Genius Bus token passing. Modules that fail any test stage are quarantined and not returned to inventory. A test report is available upon request for critical spare applications.

For sourcing inquiries on the GE Fanuc 8750-CA-NS, Series 90-70 modules, or any obsolete industrial automation parts:

• Email: sale@driveknms.com
• WhatsApp: +86 18359293191
• Web: driveknms.com

© 2026 DriveKNMS. All trademarks belong to their respective owners. Specifications are for reference only and subject to change without notice. Verify all parameters against official documentation before installation.