GE Fanuc IC693CPU352-DJ Series 90-30 25 MHz CPU Module

Description

Key Technical Specifications

The core CPU 352 specifications are documented by GE Fanuc’s Series 90-30 hardware manual.

The -DJ revision is particularly important: GE Fanuc’s March 2000 product information explicitly lists IC693CPU352-DJ under firmware Release 10.00. That release added support for the IC693DSM314 servo module and introduced support for storing Local Logic Programs associated with that module.

Product Introduction

The GE Fanuc IC693CPU352-DJ is a high-performance CPU module for the Series 90-30 PLC platform. It occupies one CPU slot and uses a 25 MHz 80386EX processor. The CPU 352 architecture supports up to eight total baseplates, allowing the main CPU rack to be combined with expansion and/or remote baseplates.

With firmware Release 9.0 and later, the CPU 352 supports up to 240 KB of user program memory. The actual memory available to the application depends on how configurable memory areas such as %R, %AI, and %AQ are allocated. Earlier firmware releases provide 80 KB of fixed user program memory.

The CPU also includes a floating-point math coprocessor, two built-in serial interfaces, and support for substantial discrete and analog data tables. These characteristics make the CPU 352 suitable for larger or more computationally demanding legacy Series 90-30 applications.

Revision-Specific Point

IC693CPU352-DJ should not simply be treated as a generic IC693CPU352. The -DJ suffix identifies a specific hardware/firmware revision. GE Fanuc’s Release 10.00 documentation explicitly lists this catalog number and describes additional firmware functionality.

For a replacement project, record the existing CPU’s complete catalog number and firmware revision before ordering.

IC693CPU352-DJ

IC693CPU352-DJ

Installation & Configuration Guide

Stage 1: Pre-Installation Preparation

⚠️ Safety First

• Place the controlled process in a safe state.
• Follow the plant’s lockout/tagout procedure.
• Remove power from the Series 90-30 rack before removing the CPU.
• Preserve the existing application program before replacement.

Record Before Removal

1. Complete CPU catalog number.
2. Hardware revision.
3. Firmware revision.
4. PLC application program.
5. Hardware configuration.
6. CPU key-switch position.
7. Serial communication parameters.
8. Expansion and remote rack configuration.

Because the CPU 352 has firmware-dependent memory capabilities, firmware identification should be part of the replacement assessment.

Stage 2: Removing the Existing CPU

1. Place the machine or process in a safe condition.
2. Turn off PLC rack power.
3. Disconnect Port 1 and Port 2 communication cables.
4. Record the existing key-switch position.
5. Release the CPU retaining mechanism.
6. Carefully remove the CPU from the rack.
7. Inspect the backplane connector.

Do not remove the original CPU until its configuration and firmware information have been documented.

Stage 3: Installing IC693CPU352-DJ

1. Use appropriate ESD protection.
2. Confirm the replacement marking reads .
3. Verify the hardware and firmware revision.
4. Insert the CPU into the dedicated CPU slot.
5. Reconnect serial communication cables.
6. Confirm the key-switch position.
7. Inspect the installation before restoring power.

Configuration Checklist

• Exact catalog number verified
• -DJ revision confirmed
• Firmware Release 10.00 confirmed where applicable
• PLC program backed up
• Hardware configuration backed up
• CPU slot confirmed
• Serial settings documented
• Expansion racks documented

Stage 4: Power-On & Commissioning

Pre-Power Inspection

• Verify the Series 90-30 power supply.
• Confirm the CPU is fully seated.
• Check communication cables.
• Confirm no loose wiring is present.

Commissioning Procedure

1. Apply PLC power.
2. Check CPU status LEDs.
3. Connect the programming/configuration software.
4. Verify CPU identification and firmware.
5. Restore the application program if necessary.
6. Verify hardware configuration.
7. Confirm I/O modules are recognized.
8. Test serial communication.
9. Place the CPU into RUN.
10. Test representative machine functions.

Troubleshooting

CPU remains in STOP or reports a fault:

• Review CPU diagnostic information.
• Verify the application program.
• Check the hardware configuration.
• Confirm installed I/O modules.
• Check the rack power supply.

Serial communication fails:

• Confirm Port 1 versus Port 2 selection.
• Verify RS-232/RS-485 wiring.
• Check baud rate and station parameters.
• Verify SNP/SNPX or RTU configuration.
• Compare settings against the original CPU.

Frequently Asked Questions

Q1: What is the ?

It is a GE Fanuc Series 90-30 CPU 352 single-slot modular CPU, using a 25 MHz 80386EX processor. The -DJ version is specifically documented in GE Fanuc’s Release 10.00 firmware product information.

Q2: How muces support?

With Release 9.0 or later firmware, CPU 352 supports up to 240 KB of user program memory. Earlier firmware supports 80 KB. Actual available application memory depends on configurable word-memory allocation.

Q3: What pes use?

The CPU uses an 80386EX processor operating at 25 MHz.

Q4: Does the CPU 352 support floating-point calculations?

Yes. The CPU 352 includes a built-in math coprocessor for floating-point calculations.

Q5: How many baseplates can the CPU 352 system support?

A Series 90-30 system using this CPU can contain up to eight baseplates total: one CPU baseplate plus up to seven expansion and/or remote baseplates.

Q6: What is special about the -DJ revision?

The -DJ catalog revision is explicitly associated with firmware Release 10.00 in GE Fanuc’s product information. Release 10.00 added support for the IC693DSM314 servo module and support for storing Local Logic Programs associated with that module.

Q7: Can I substitute another or ?

Do not assume interchangeability solely from the base CPU number. Check the complete catalog number, hardware revision, firmware requirements, application features, and connected modules. This is particularly important if the system uses the DSM314 servo functionality introduced in the Release 10.00 feature set.

Q8: What should I verify beng ?

Verify:

• Exact part number:
• CPU model: CPU 352
• Hardware revision
• Firmware revision
• 240 KB versus 80 KB memory requirement
• Existing I/O configuration
• Expansion/remote rack configuration
• Serial communication requirements
• DSM314 usage, if applicable
• Required condition: New Original, New Surplus, Tested Used, or Refurbished

For a legacy Series 90-30 replacement, the complete revision suffix mattersat as a specific procurement target rather than ordering a generic CPU 352 based only on the first nine characters of the catalog number.