GE IC697CMM742 Series 90-70 Ethernet Interface Module

Description

Product Introduction

The GE IC697CMM742 is a Type 2 Ethernet Interface Module developed for the GE Fanuc Series 90-70 PLC platform. It enables industrial Ethernet connectivity for controller programming, peer-to-peer data exchange, SCADA communication, and HMI integration across manufacturing and process automation systems.

Unlike the earlier Ethernet Type 1 modules, the IC697CMM742 adds expanded Ethernet functionality through TCP/IP SRTP services and Ethernet Global Data (EGD), allowing higher communication capacity while maintaining compatibility with existing Series 90-70 hardware. For plants keeping legacy systems online, it remains one of the most widely deployed Ethernet communication modules.

Key Technical Specifications

Application Scenarios & The “Trench” Experience

Anyone who has maintained a twenty-year-old production line has probably experienced this situation. A Series 90-70 CPU is still executing logic perfectly, but the plant suddenly loses Ethernet communication. The PLC hasn’t failed. The process hasn’t stopped because of logic. The Ethernet interface has. Without a replacement communication module, engineering workstations, SCADA servers, and production historians all lose visibility.

Typical applications include:

• Power Generation – Turbine auxiliary control systems requiring continuous SRTP communication with supervisory servers.
• Water & Wastewater – Remote pumping stations exchanging Ethernet Global Data with central SCADA.
• Automotive Manufacturing – Production cells using Series 90-70 PLCs connected to HMI stations and MES systems.
• Chemical Processing – Distributed control architectures where multiple PLC racks exchange process variables across Ethernet.
• Oil & Gas Facilities – Legacy compressor and pipeline control systems where replacing the entire PLC platform would require extended shutdowns.

Field Replacement Example

A packaging facility experienced intermittent Ethernet dropouts after lightning-induced network damage. The CPU remained healthy, but the IC697CMM742 repeatedly lost LAN synchronization. Since production scheduling depended on SCADA data collection, operators were forced into manual logging.

A verified replacement module restored network communications within an hour. No PLC program changes were required because the Ethernet configuration was retained. The plant avoided a complete migration project that would have required several days of downtime.

Transparency SOP: Quality Assurance & Testing

We don’t just ship boxes; we test them on actual GE Series 90-70 racks whenever possible.

• Inbound Inspection
  • Verify part number and revision.
  • Inspect OEM labels, PCB condition, connectors, and housing.
  • Screen for counterfeit markings and unauthorized repairs.
• Live Rack Testing
  • Install the module in a powered Series 90-70 chassis.
  • Confirm successful module initialization.
  • Verify Ethernet port operation and communication handshakes.
• Electrical Verification
  • Measure backplane current draw.
  • Inspect connector integrity.
  • Check AUI fuse continuity.
  • Verify LED diagnostics.
• Firmware Verification
  • Record firmware revision.
  • Confirm successful boot sequence.
  • Validate communication through Station Manager and Ethernet interfaces.
• Final Quality Control
  • Final visual inspection.
  • Anti-static packaging.
  • Shock-resistant shipping materials.
  • Serial number traceability before shipment.

IC697CMM742

IC697CMM742

The Veteran’s Tech Trap Guide

⚠️ Firmware revisions matter.

A newer Ethernet module may physically fit your rack but still refuse communication with older CPU firmware. Always verify CPU firmware compatibility before replacing the module.

❗Don’t ignore the network media.

This module supports 10Base-T, 10Base2, and AUI. Plants that still use coaxial Ethernet often overlook cable termination problems. The module isn’t always the culprit.

⚠️ Take pictures before removal.

Document every cable, especially AUI adapters and legacy coax connections. Twenty years of undocumented maintenance usually means someone already made undocumented modifications.

❗Never assume hot swapping is safe.

Series 90-70 communication modules were not designed for casual live replacement. Unless your plant procedures specifically allow it, isolate power before removing the card. Accidentally damaging the backplane costs far more than the communication module itself.

⚠️ Verify the Station Manager settings.

Communication failures sometimes come from mismatched IP configuration or Station Manager parameters—not failed hardware. Confirm configuration before declaring the module defective.

Frequently Asked Questions (FAQ)

Q1. Does the support hot swapping?

No. GE did not design the for routine hot replacement. Follow your site’s maintenance procedure and remove power unless your qualified engineering procedures explicitly permit otherwise.

Q2. Which communication protocols are supported?

The module supports Ethernet communication using TCP/IP, SRTP, and Ethernet Global Data (EGD). It also provides Station Manager access through the RS-232 service port.

Q3. Can it replace the IC697CMM741?

In many Series 90-70 systems, yes. However, verify firmware revisions, network configuration, and application requirements before installation. Some legacy projects require configuration updates.

Q4. Is firmware already installed?

Yes. The module ships with onboard firmware. Firmware can also be updated through the software load interface when required.

Q5. What warranty is typically offered?

Most qualified industrial surplus suppliers provide a 12-month warranty, with longer warranty periods depending on inventory source and testing standards.

Q6. Why is this module less expensive than buying directly from the OEM?

The is a discontinued product. Most available inventory comes from global industrial surplus, plant decommissioning projects, or professionally refurbished stock rather than current factory production. Lower pricing reflects the supply channel—not necessarily lower quality. What matters is documented testing, traceability, and functional verification before shipment.

Q7. Is this module new or refurbished?

Both conditions exist in the market. New Surplus units originate from unused legacy inventory, while refurbished units have been inspected, repaired if necessary, and functionally tested. Always request test records, firmware revision information, and photographs of the actual unit before purchasing.