Description
SEO Titles
GE IC693CPU364-CJ | Firmware 10.60 Ethernet CPUGE IC693CPU364-CJ | CJ Revision 240KB ModuleGE IC693CPU364-CJ | Embedded 10BaseT AAUIGE IC693CPU364-CJ | Frame Ground RequiredGE IC693CPU364-CJ | EGD Global Data CPU
Product Core Brief
- Model: IC693CPU364-CJ
- Brand: GE Fanuc (Emerson)
- Series: Series 90-30
- Core Function: CJ revision single-slot CPU module with embedded Ethernet interface (10BaseT/AAUI), 240KB configurable user memory, firmware 10.60, and Ethernet Global Data (EGD) support for networked industrial automation.
- Product Type: Modular CPU Module (CJ Revision)
- Key Specs: 240KB Memory | 4K I/O | Firmware 10.60 ⚠️ EOL — CJ revision, frame ground mandatory, 1.1A power requirement

GE IC693CPU364
Product Introduction
GE is a CJ revision of the single-slot CPU module for Series 90-30 PLC systems, featuring an embedded Ethernet interface with firmware Release 10.60. Powered by an 80386EX processor running at 25MHz with a scan rate of 0.22ms per 1K boolean logic, this module provides 240KB of configurable user memory, support for up to 4K I/O points across 8 baseplates (1 CPU + 7 expansion/remote), and register memory ranging from 128 to 32,640 words with Control v2.2 software. The CJ revision includes specific circuit board updates (CPU board 44A739579-G01R05, Ethernet daughterboard 44A739599-G01R04) and represents one of the later production runs 3CPU364 family.
The embedded Ethernet interface supports Ethernet Global Data (EGD) protocol with configurable Name Resolution features introduced in firmware 9.1 and fully supported in Release 10.60. Two connection options are available: 10BaseT port with built-in transceiver for direct network connection, and AAUI port for external transceiver (IEEE 802.3 compliant) when specialized networking equipment is required. Communication bypasses PLC backplane for improved speed compared to separate CPU + Ethernet module configurations. The module includes RS-232 serial port (Port 1) for terminal emulation and programming, plus RS-485 port via power supply connector supporting SNP/SNPX slave protocols. For SNP/SNPX master, RTU master, or CCM functionality, a CMM module is required. Key features include RAM and Flash memory storage, battery-backed clock, override functionality, periodic subroutine interrupts, floating-point math support (firmware 9.0+), and a replaceable Ethernet fuse (1A @ 125V, part 44A725214-001). Critical installation requirement: frame ground connection at CPU slot using provided ground wire—verify with OEM datasheet.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Module Type | Single-slot CPU module (CJ Revision) |
| Product Line | Series 90-30 |
| Processor Type | Intel 80386EX |
| Clock Speed | 25 MHz |
| User Program Memory | 240KB configurable maximum (firmware 9.0+) / 80KB fixed (pre-firmware 9.0) |
| Typical Scan Rate | 0.22ms per 1K boolean contacts |
| Discrete Input Points – %I | 2,048 |
| Discrete Output Points – %Q | 2,048 |
| Discrete Global Memory – %G | 1,280 bits |
| Internal Coils – %M | 4,096 bits |
| Temporary Coils – %T | 256 bits |
| System Status References – %S | 128 bits (%S, %SA, %SB, %SC – 32 bits each) |
| Register Memory – %R | 128 to 32,640 words configurable (Windows programmer Control v2.2+) / 128 to 16,384 words (DOS Logicmaster) |
| Analog Inputs – %AI | 128 to 32,640 words configurable (Windows programmer) / 128 to 16,384 words (DOS Logicmaster) |
| Analog Outputs – %AQ | 128 to 32,640 words configurable (Windows programmer) / 128 to 16,384 words (DOS Logicmaster) |
| System Registers – %SR | 28 words (reference only) |
| Timers/Counters | >2,000 total |
| Shift Registers | Supported |
| Ethernet Interface | Embedded — 10BaseT (built-in transceiver) + AAUI (external transceiver) |
| Ethernet Protocol | Ethernet Global Data (EGD) — firmware 9.1+ |
| Configurable Name Resolution | Yes (firmware 9.1+) |
| Serial Port 1 | RS-232 (15-pin D-sub on CPU) — terminal emulator, programming |
| Serial Port 2 | RS-485 (via power supply) — SNP/SNPX slave |
| Communication Modules | Supports additional Ethernet modules, Profibus, FIP, Genius (GBC, GCM, GCM+) |
| Override Function | Yes |
| Battery-Backed Clock | Yes |
| Interrupts | Periodic subroutine feature supported |
| Memory Types | RAM and Flash |
| PCM/CCM Compatibility | Yes (CMM module required for SNP/SNPX master, RTU master, CCM) |
| Floating Point Math | Yes (firmware 9.0 and later) |
| Total Baseplates per System | 8 (1 CPU + 7 expansion/remote) |
| Slot Requirement | Slot 1 of baseplate |
| Operating Temperature | 0–60°C (32–140°F) |
| Storage Temperature | -40 to 85°C (-40 to 185°F) |
| Power Requirements | 1.1A @ 5VDC (CPU only), 1.51A total with AAUI transceiver (400mA) or converter (100mA) |
| Ethernet Fuse | 1A @ 125V slow-acting (part 44A725214-001) |
| Weight | Approximately 1.2 lbs (0.55 kg) |
| Grounding Requirement | Frame ground connection mandatory at CPU slot |
| Indicators | 4 LEDs (EOK, LAN, STAT for Ethernet; PS for power) + Ethernet Restart button |
| Product Lifecycle Status | Discontinued/Obsolete |
Quality Control Process
1. Incoming VerificationValidater and confirm CJ revision through label inspection. Verify embedded Ethernet interface (10BaseT and AAUI ports) and RS-232 Port 1 are present. Check Ethernet fuse (1A @ 125V, part 44A725214-001) for integrity. Verify frame ground connection tab and ground wire presence. Check for physical damage, bent pins, corrosion, or signs of overheating. Confirm Flash memory integrity and check battery voltage for clock backup functionality. Verify firmware version 10.60 is loaded—this is the defining characteristic of the CJ revision. Note that CPU board ID should be 44A739579-G01R05 or later, and Ethernet daughterboard ID should be 44A739599-G01R04 or later.
2. Power-On TestInstall CPU in Slot 1 of compatible baseplate with 5VDC power supply (minimum 1.51A capacity with AAUI transceiver—IC693PWR330 recommended). CRITICAL: Connect frame ground wire to ground terminal at CPU slot before powering on. Power on and verify OK LED illuminates within 5 seconds. Confirm RUN LED activates correctly. Monitor Ethernet LEDs (EOK, LAN, STAT) for proper network initialization with firmware 10.60. Monitor for error LEDs or fault conditions during 30-minute burn-in period.
3. Memory Configuration TestVerify maximum configurable memory (240KB with firmware 9.0+). Test register memory (%R) configuration from 128 to 32,640 words in 128-word increments with Windows programmer (Control v2.2+). Verify DOS Logicmaster limitation to 16,384 words. Configure analog I/O memory (%AI, %AQ) allocation and verify capacity up to 32,640 words with Windows programmer. Test Flash memory programming/erasure cycle. Validate floating-point math operations with precision checks. Verify EGD configuration can be loaded with firmware 10.60 features.
4. Ethernet Interface TestTest 10BaseT port connectivity with standard CAT5 cable to network switch. Verify EOK, LAN, and STAT LEDs indicate proper link status. Test AAUI port with external transceiver (if applicable)—note that AAUI transceiver requires additional 400mA power. Load EGD configuration and test PLC-to-PLC data exchange. Verify Name Resolution functionality with firmware 10.60. Test Ethernet Restart button functionality (LED test, Restart, Software Load state, Maintenance state). Verify communication bypasses backplane for improved speed.
5. Serial Port Communication TestTest Port 1 (RS-232) communication at 9600/19200 baud for terminal emulator and programming. Test power supply RS-485 port for SNP/SNPX slave functionality. If CMM module is installed, verify SNP/SNPX master and RTU master protocols.
6. I/O and Expansion TestConfigure local and remote I/O modules up to 4K points total across 8 baseplates. Verify analog input/output accuracy with signal calibrator. Test communication with expansion baseplates (maximum 7 remote/expansion). Verify IC693ALG220/221G analog module compatibility (revision G or later recommended for stable operation with CJ firmware).
7. Final QC & PackagingDocument firmware version 10.60, EGD configuration, Name Resolution settings, memory configuration settings, and battery status. Test Ethernet interface and all serial ports for functionality. Verify frame ground connection is documented. Apply QC Passed sticker with CJ revision and firmware verification notation. Include EGD configuration documentation and firmware upgrade requirements (if applicable). Package with anti-static materials.

GE IC693CPU364
Replacement Pitfall Guide
❗ Firmware Version 10.60 is specifically identified by firmware Release 10.60. Earlier CPU364 revisions (firmware 10.71, 10.75, etc.) may have different circuit board versions. The CJ revision includes CPU board 44A739579-G01R05 and Ethernet daughterboard 44A739599-G01R04. Verify current firmware version before replacement—upgrade kit 44A747767-G07 is available for earlier versions. Do not downgrade firmware from 10.60 unless required for compatibility reasons.
❗ CJ Revision Circuit Board IdentificationThe CJ revision uses specific circuit board versions:
- CPU board: 44A739579-G01R05 or later
- Ethernet daughterboard: 44A739599-G01R04 or laterWhen replacing or troubleshooting, confirm these board IDs match CJ revision specifications. Earlier board IDs indicate different hardware revisions that may not support all firmware 10.60 features.
❗ Power Supply Calculation with Accessories requires 1.1A @ 5VDC for CPU operation alone. However, total power consumption increases with accessories:
- AAUI transceiver: +400mA (total 1.51A)
- IC690ACC901 serial converter: +100mA
- IC690ACC900 RS-422/RS-485 converter: +170mACalculate total system power requirement before replacement. IC693PWR321 (1.5A) is marginal with AAUI transceiver—IC693PWR330 (3.0A) is recommended.
❗ Frame Ground Connection Mandatory must be connected to frame ground at the slot where it’s installed using the provided ground wire. Failure to ground properly causes erratic Ethernet behavior, communication failures, EGD data corruption, and potential ESD damage. This requirement is critical for CJ revision due to embedded Ethernet circuitry—verify ground wire is connected before applying power.
❗ Ethernet Fuse SpecificationsThe Ethernet interface is protected by a replaceable fuse (1A @ 125V slow-acting, part 44A725214-001). Fuse dimensions: 2.69 x 2.69 x 6.1 mm. Do not substitute with incorrect fuse ratings. If Ethernet fails to initialize, check fuse first before replacing module. Fuse is accessible from module front panel.
❗ Full Duplex Network ConfigurationWith firmware 10.60, the 10BaseT port supports full duplex operation when connected directly to a managed Ethernet switch port configured for full duplex at 10 Mbps. Connecting to auto-negotiating hubs or half-duplex networks causes severe performance degradation, increased collisions, CRC errors, and undetected data corruption. Verify switch port configuration before deployment.
❗ Name Resolution Feature AvailabilityFirmware 10.60 includes configurable Name Resolution features added in Release 9.1. Use VersaPro v2.00+ or Control v2.00+ to configure EGD and Name Resolution. Logicmaster 90-30 v9.02+ supports basic CPU configuration but does not support EGD or Name Resolution features. Choose appropriate programming software for your requirements.
❗ IP Address ConfigurationProper IP addressing is always essential for CPU364-CJ operation in TCP/IP networks. Use correct IP address, subnet mask, and gateway settings. Incorrect addressing can disrupt network operation and cause EGD communication failures. Use CHSOSW command via serial terminal to configure temporary IP address, then use Station Manager for permanent configuration.
❗ AAUI Transceiver Power RequirementsWhen using AAUI port with external transceiver, ensure transceiver power draw does not exceed 400mA @ 5VDC. IC649AEA103 transceiver requires 380mA. Do not connect transceiver with power on—sudden load changes may cause unexpected operation or blow Ethernet interface fuse.
❗ Analog Module Timing CompatibilityIC693ALG220/221F (version F and earlier) may exhibit erratic %AI values wth . Use IC693ALG220/221G (version G or later) or ensure CPU firmware is 10.60 to resolve timing issues with optocouplers. This timing issue is resolved in later analog module revisions.
❗ Communication Request AddressingEach COMMREQ sent to CPU364-CJ via EGD must be addressed to SYSID = 0001 (Rack 00 / Slot 01, CPU location) and TASK = 21 decimal. Note that TASK = 0 is used for IC693CMM321 Ethernet module communications. Incorrect addressing causes rejected requests and communication failures.
❗ No Hot Swap SupportLike all Series, does not support hot swapping. Module removal during operation causes system shutdown. Plan maintenance during scheduled downtime and ensure proper power-off procedure before removing CPU.
❗ Timeout Settings for Large Data TransfersWhen storing large (>14KB) program blocks or transferring large %R tables via Ethernet, increase request timeout value in programming software to avoid timeout messages. Default timeout may be insufficient for large transfers. An upper bound of 25 seconds is typically satisfactory for firmware 10.60.
❗ Grounding Tab Location VerificationThe frame ground connection tab is located on CPU module front panel. Use the provided ground wire to connect to the ground terminal at the CPU slot in the baseplate. Do not rely on backplane ground alone—CJ revision requires direct frame ground for Ethernet interface stability with firmware 10.60.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
Compatibility Matrix
- IC693CPU364 (earlier firmware) : Upgrade path — firmware 10.60 adds Name Resolution features, circuit board updates
- → IC693CPU363 : Downgrade path — lose embedded Ethernet, different power (890mA)
- → IC693CPU360-EL : Downgrade path — lose embedded Ethernet, lower power (670mA)
- → IC693CPU350 : Downgrade path — lose Ethernet, half memory (32KB), lower power (480mA)
- → IC695CPU310 (RX3i) : Migration target — modern replacement with enhanced Ethernet features
- → IC693CMM321 (Ethernet) : Not needed — embedded Ethernet replaces this module
- → IC693PCM300 (RTU master) : Compatible — adds RTU master functionality (CMM module required)
- → IC693ALG220/221G : Compatible — revision G recommended for stable operation
- → IC693ALG220/221F (version F) : Not recommended — erratic behavior possible due to timing issues
- → Expansion baseplates : Compatible — up to 7 expansion/remote baseplates
- → IC693PWR321 : Not recommended with AAUI transceiver — borderline capacity (1.5A)
- → IC693PWR330 : Recommended — 3.0A capacity provides adequate headroom
- → Genius modules (GBC, GCM, GCM+) : Compatible — supports multidrop
- → Profibus/FIP modules : Compatible — LAN option modules required
- → IC649AEA103 (AAUI transceiver) : Compatible — requires 380mA additional power
Benchmarks
- Logic scan speed: 0.22ms per 1K boolean contacts (typical)
- User program memory: 240KB configurable maximum (firmware 9.0+) / 80KB fixed (pre-firmware 9.0)
- Discrete I/O capacity: 4,096 input + 4,096 output points total (2,048 each)
- Analog I/O capacity: Configurable %AI and %AQ up to 32,640 words combined (Windows programmer) / 16,384 words (DOS Logicmaster)
- Register memory: 128 to 32,640 words configurable (Windows programmer) / 16,384 words (DOS Logicmaster)
- Timers/Counters: >2,000 total
- Battery backup life (clock): 2-3 years typical
- Memory retention: Flash (non-volatile), RAM (battery-backed)
- Ethernet port types: 10BaseT (built-in transceiver), AAUI (external transceiver)
- Ethernet protocol: Ethernet Global Data (EGD) — firmware 9.1+, Name Resolution (firmware 9.1+)
- Ethernet speed: 10 Mbps (10BaseT standard)
- Ethernet full duplex: Yes (with managed switch, firmware 10.60)
- Ethernet cable length: ≤100 meters to hub/switch (10BaseT)
- Serial port baud rates: 300–19.2Kbps (RS-232 and RS-485)
- Serial protocols: SNP/SNPX slave (Port 1 and power supply), master/CCM/RTU (requires CMM module)
- Power consumption: 1.1A CPU only / 1.51A with AAUI transceiver (400mA) @ 5VDC
- Power-up time: <8 seconds to program execution (Ethernet initialization adds ~2 seconds)
- Mean time between failures (MTBF): >200,000 hours at 40°C
- Baseplate support: 8 total baseplates (1 CPU + 7 expansion/remote)
- Floating-point math: Supported (firmware 9.0 and later)
- Configurable memory: Yes — 240KB maximum (firmware 9.0+)
- Firmware version: 10.60 (CJ revision defining characteristic)
- Circuit board IDs: CPU 44A739579-G01R05, Ethernet 44A739599-G01R04

