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The GE IC697CPX928-FE is a high-performance Central Processing Unit (CPU) module in the GE Fanuc (now Emerson Automation) Series 90-70 PLC family. Featuring a 96 MHz 80486DX4 microprocessor and 32-bit architecture with floating-point math support, the GE IC697CPX928-FE delivers fast scan times (0.4 µs per Boolean function) and robust processing power for complex automation tasks. It provides 6 MB of battery-backed user/program memory plus 256 KB non-volatile user flash memory for firmware and configuration storage. The GE IC697CPX928-FE supports up to 12K discrete I/O points (any mix) and 8K analog I/O points in a single-slot design, making it suitable for medium-to-large control applications in manufacturing, process industries, and utilities. With three serial ports and compatibility with MS-DOS or Windows-based programming software (Logicmaster 90 or Proficy Machine Edition), the GE IC697CPX928-FE offers flexible communication and easy integration into existing Series 90-70 racks. Although a legacy CPU, the GE IC697CPX928-FE remains widely supported for sustaining or upgrading older PLC systems where high reliability and performance are required.

Model,GE IC697CPX928-FE

Manufacturer,GE Fanuc Automation (Emerson Automation)

Series,Series 90-70 PLC

Product Type,High-Performance CPU Module (Single Slot)

Processor,"80486DX4, 96 MHz"

User Memory,6 MB battery-backed RAM

Flash Memory,256 KB non-volatile user flash

Scan Rate,0.4 µs per Boolean function

I/O Capacity,12K discrete I/O (any mix); 8K analog I/O

Serial Ports,Three serial ports (typically 1 RS-232 + 2 others)

Floating Point Math,Supported

Power Requirements,"5 VDC, 3.1 Amps nominal"

Mounting,Single slot in Series 90-70 rack

Operating Temperature,0°C to 60°C (requires forced air cooling in some configurations)

Programming Software,Logicmaster 90 (MS-DOS) or Windows-based tools

Additional Features,"Lithium battery backup, enhanced diagnostics, compatible with redundant setups"

Insert the GE IC697CPX928-FE into an available single slot in the Series 90-70 PLC rack, ensuring proper alignment with the backplane.

Install or verify the lithium battery for memory retention and connect any required programming cable (serial or Ethernet adapter).

Apply power to the rack and observe the CPU status LEDs for normal boot and “OK” indication.

Connect a programming computer running Logicmaster 90 or Proficy Machine Edition via serial port.

Configure hardware settings, enter or download the application program (ladder logic, etc.), and set I/O mapping.

Switch the CPU to RUN mode and monitor real-time variables, scan times, and diagnostics through the programming software or HMI.

Perform functional tests on controlled equipment and review fault tables for any alarms or errors.

Power down the entire Series 90-70 rack before inserting or removing the GE IC697CPX928-FE to avoid backplane damage or electrical hazards.

Use proper ESD protection (wrist strap and grounded mat) when handling the module to protect the 80486DX4 processor and memory components.

Confirm the rack power supply can deliver the required 3.1 A at 5 VDC and provide adequate forced-air cooling if operating near maximum temperature.

Verify battery installation and polarity; replace with the correct lithium CMOS battery for memory backup.

Route serial communication cables away from high-voltage or noisy lines and use shielded cable where possible.

Ensure the module firmware version is compatible with your programming software before downloading applications.

After installation, run CPU self-diagnostics, clear fault tables, and perform a memory checksum test before placing the system online.

Monitor the front-panel LEDs on the GE IC697CPX928-FE daily for “RUN”, “OK”, “FAULT”, and battery status indications.

Check system diagnostics and fault tables via programming software or HMI for scan time anomalies, memory errors, or I/O communication issues.

Inspect the lithium battery voltage periodically and replace it according to GE recommended intervals to prevent data loss.

Review application logs and event history for unexpected CPU behavior or protection faults.

Verify rack temperature and ventilation to maintain 0–60°C ambient conditions with proper airflow.

Clean dust from the module and rack vents (power off) using low-pressure compressed air every 1–3 months depending on environment.

During scheduled outages, backup the program and configuration, test memory integrity, and verify serial port communication functionality.

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