GE IC693CPU352-DJ Series 90-30 High-Performance CPU

Description

Product Introduction & Engineering Value

When a mature Series 90-30 system begins showing unexplained watchdog faults or communication interruptions, replacing I/O modules rarely solves the problem if the controller itself is reaching the limits of its service life. In many facilities, maintaining the existing PLC architecture is far more practical than performing a complete migration.

The GE IC693CPU352-DJ is a high-capacity Series 90-30 CPU designed for demanding machine and process control applications. Powered by a 25 MHz Intel 80386EX processor, it combines large application memory, hardware floating-point capability, and integrated serial communications, making it suitable for systems with extensive I/O, multiple operator interfaces, and distributed control requirements. Firmware Release 10.00 introduced additional functionality, including support for the IC693DSM314 Servo Module, Local Logic Programs, and automatic reboot after selected fatal faults.

Technical Specifications

Field Application & The “Trench” Experience

A petrochemical blending unit experienced intermittent production delays after several years of continuous operation. Operators reported occasional controller resets whenever multiple HMIs simultaneously requested production data while recipe calculations were executing. Initial troubleshooting focused on network hardware, but diagnostics showed the processor was operating close to its memory and communication limits.

During a scheduled maintenance shutdown, engineers installed an IC693CPU352-DJ, restored the archived application, and verified the hardware configuration. After startup, scan times stabilized, communication with remote I/O racks returned to normal, and the production unit completed acceptance testing without modifying the existing control logic.

Typical applications include:

• Continuous reactor temperature and pressure control
• High-speed packaging and palletizing systems
• Water treatment plants with distributed remote I/O

IC693CPU352-DJ

IC693CPU352-DJ

Transparency SOP: QA & Testing

Every CPU module is evaluated using a documented inspection process before shipment.

1. Verify catalog number, hardware revision, and firmware identification.
2. Inspect PCB assemblies, backplane connector, serial ports, and battery circuitry.
3. Install the CPU in a compatible Series 90-30 test rack.
4. Execute a functional PLC application to verify processor performance and scan execution.
5. Test all serial communication ports, memory retention, LED diagnostics, and power cycling.
6. Confirm compatibility with supported expansion racks and communication modules.
7. Package the controller using ESD-safe materials with industrial protective packaging.

For New Surplus inventory, unused condition and factory identification labels are verified. Refurbished units undergo additional operational and burn-in testing before shipment.

The Veteran’s Tech Trap Guide

⚠️ Verify the Firmware Revision Before Replacement

The IC693CPU352-DJ is associated with Firmware Release 10.00. Besides increasing functionality, this release added support for the IC693DSM314 Servo Module, Local Logic Programs, and automatic reboot after certain fatal faults. Installing an older firmware revision into a system that depends on these functions can create compatibility issues.

⚠️ Save the Entire PLC Project

Backing up only the ladder logic is not enough. Always archive the hardware configuration, communication settings, and configurable memory allocation before replacing the CPU.

PRO TIP: Many watchdog faults originate from unstable power supplies rather than defective processors. Verify the Series 90-30 +5 VDC backplane supply before replacing the CPU.

⚠️ Check Memory Configuration

Although the CPU supports 240 KB of user memory, the actual application size depends on how %R, %AI, and %AQ memory are allocated. If configurable memory differs between the original and replacement controller, application downloads may fail or report insufficient memory.

Dynamic FAQ

Q1. What processor does the IC693CPU352-DJ use?

The module is built around a 25 MHz Intel 80386EX processor with integrated hardware floating-point support, providing high performance for complex Series 90-30 applications.

Q2. What distinguishes the -DJ revision?

The -DJ hardware revision ships with Firmware Release 10.00, introducing Local Logic Program support, IC693DSM314 servo module compatibility, automatic reboot after selected fatal faults, and additional firmware enhancements.

Q3. How much application memory is available?

The controller supports 240 KB of user program memory. The usable capacity depends on the configured allocation of configurable memory areas such as %R, %AI, and %AQ.

Q4. Can the IC693CPU352-DJ support distributed I/O?

Yes. The CPU supports one local CPU baseplate plus up to seven expansion and/or remote baseplates, making it suitable for larger distributed control systems.

Q5. Which programming software is compatible?

The controller is supported by Logicmaster 90, VersaPro, and later Proficy Machine Edition software, depending on the installed firmware revision and project requirements.

Q6. Are New Surplus modules tested before shipment?

Yes. Every New Surplus module is inspected for part number accuracy, connector condition, firmware identification, and physical integrity. Refurbished units receive additional functional testing, communication verification, and memory retention validation before shipment.