GE IC697CPM925

Product Overview: The GE IC697CPM925 CPU Module

The GE IC697CPM925 is a high-performance Central Processing Unit (CPU) module for the GE Fanuc Series 90-70 PLC system. This controller is a key component in one of the industry’s most rugged and reliable legacy PLC platforms, designed for complex and critical control applications requiring fast scan times and robust communication. The IC697CPM925 excels in handling large I/O configurations and sophisticated program logic, making it a cornerstone for extensive industrial automation projects. As part of the 90-70 series, this CPU provides advanced features like floating-point math, a large user memory, and support for Genius distributed I/O. When planning a system around the GE IC697CPM925, it is essential to consult the official product documentation and resources for detailed specifications.

Product Parameters and Technical Specifications

• Processor & Performance: Built on a high-speed 25 MHz processor, it offers fast execution of control logic, suitable for real-time applications.

• Memory Configuration: Boasts 1.5 MB of total memory, which is partitioned into 768K for the operating system and 768K for the user application (ladder logic, data tables, etc.).

• I/O Capacity: Supports a large system configuration, capable of managing up to 12 racks (including local and remote) and over 3000 digital I/O points.

• Communication & Networking: Features a built-in serial port (SNP) for programming and operator interface connectivity. It supports Genius LAN communication for high-speed, peer-to-peer networking with distributed I/O blocks and other Genius-compatible devices.

• Programming Compatibility: Programmed using GE’s Proficy Machine Edition or older LM90 software, adhering to standard ladder logic and other IEC-style programming methods.

• Special Features: Includes a real-time clock/calendar, battery-backed memory, and support for intelligent modules like motion controllers and communication coprocessors.

Advantages and Key Features

• Proven Ruggedness & Reliability: The Series 90-70 platform, including the IC697CPM925, is renowned for its industrial durability and longevity in harsh environments.

• High I/O and Memory Capacity: Its substantial I/O handling and user memory size made it suitable for large-scale applications, from factory-wide automation to major process control systems.

• Genius LAN Integration: Native support for the Genius LAN provides deterministic, high-speed distributed I/O control, a significant advantage for geographically spread-out systems.

• Established Legacy Platform: For decades, it has been a trusted solution in industries where system stability and long-lifecycle support are critical.

• Strong Redundancy Options: The platform supports hot-standby CPU redundancy configurations, which is vital for processes where downtime is unacceptable.

Application Cases in Industry

• Electrical Power Generation & Distribution: Controlling turbine auxiliaries, switchgear, and substation automation due to its robustness and reliability.

• Oil & Gas Pipelines: Managing pump stations, valve control, and safety shutdown (ESD) systems across long distances, leveraging the Genius LAN capability.

• Water Treatment Facilities: Automating large-scale filtration, chemical dosing, and pump control networks.

• Automotive Manufacturing: Controlling major transfer lines, paint shops, and complex assembly processes in large automotive plants.

• Metals Production: Integrated into control systems for rolling mills, furnaces, and material handling in steel and aluminum production.

Comparison with Competing Products
In its era, the GE IC697CPM925 competed directly with controllers like the Allen-Bradley PLC-5/80 and the Siemens SIMATIC S5-155U. Compared to the PLC-5, the IC697CPM925 often offered a larger standard memory and a more integrated approach to high-speed distributed I/O via Genius, whereas the PLC-5 relied more on additional communication modules for similar networks like Data Highway Plus. Against the S5-155U, it provided a different programming philosophy and network ecosystem. The primary consideration today is its status as a mature, legacy product, contrasted with modern controllers like the GE Rx3i or Emerson’s later PACSystems, which offer higher performance, more contemporary networking (Ethernet), and current software support.

Selection Suggestions and Precautions

• Selection Advice: The GE IC697CPM925 is now primarily selected for servicing, expanding, or migrating existing Series 90-70 installations. It is rarely chosen for new greenfield projects unless there is a specific requirement for compatibility with an entrenched Genius I/O infrastructure. It is ideal for maintaining legacy systems where long-term operational consistency is paramount.

• Precautions:

  1. Legacy Status: Recognize that the IC697CPM925 and the 90-70 series are legacy products. Availability of new units may be limited, and long-term support considerations are crucial.

  2. Software & Spares: Ensure access to appropriate programming software (Proficy ME with the correct add-ons) and a reliable source for spare modules and batteries.

  3. Migration Planning: For new projects or major upgrades, evaluate migration paths to modern platforms like Emerson’s PACSystems RX3i, which can reuse existing I/O and possibly logic.

  4. Documentation is Key: Always rely on the official installation and configuration guides for the GE IC697CPM925 for accurate technical details, wiring practices, and compatibility information.