Description
3. Key Technical Specifications
| Parameter | Value |
| Processor Type | Intel 80386EX |
| Processor Speed | 25 MHz |
| Backplane Slot Width | Occupies 1 slot (Plugs into Slot 1 of CPU Baseplate) |
| User Memory Capacity | 32K Bytes (Non-configurable user program space) |
| Typical Execution Scan Rate | 0.22 ms per 1K of logic (Boolean contacts) |
| Maximum Baseplates Supported | 8 Total (1 CPU Baseplate + 7 Expansion/Remote Baseplates) |
| Discrete Input Points (%I) | 2,048 points |
| Discrete Output Points (%Q) | 2,048 points |
| Register Memory (%R) | 9,999 words |
| Analog Inputs (%AI) | 2,048 words |
| Analog Outputs (%AQ) | 512 words |
| Power Supply Current Draw | 670 mA @ +5 VDC (Early revisions) / up to 890 mA (Later revisions) |
| Communication Support | SNP/SNP-X Slave (Built-in via power supply port); Ethernet, Profibus, GBC via Option Modules |
| Math Support | Floating Point Math (Firmware-based, Release 9.00 or later) |
4. Product Introduction & Supply Chain Strategy
The GE IC693CPU350 is the primary, single-slot processor engine designed for the modular GE Fanuc Series 90-30 PLC platform. Powered by a 25 MHz Intel 80386EX 32-bit processor, this controller delivers an exceptionally fast execution scan rate of 0.22 ms per 1K of Boolean logic. With capacity to manage up to 4,096 total discrete I/O points and coordinate signals across eight total baseplates, it provides the deterministic processing power needed for complex motion control, chemical processing, and municipal water treatment environments.
From an inventory management standpoint, tracking down an authentic New Surplus unit is the only reliable mitigation strategy against absolute system obsolescence. The Series 90-30 line has been formally transitioned to End-of-Life (EOL) status, causing direct factory supply chains to vanish. Choosing used backplanes poses extreme operating threats, as warped terminal pins or invisible hairline PCB traces can cause intermittent bus drops that are nearly impossible to troubleshoot. Securing a factory-sealed, New Surplus chassis keeps your total cost of ownership (TCO) protected—eliminating structural vulnerabilities and warding off unplanned facility shutdowns that can cost thousands of dollars a minute.
- IC693CPU350
- IC693CPU350
5. Installation & Configuration Guide
Stage 1: Pre-Installation (Prep & Safety)
- Power down the main Series 90-30 power supply module. Do not attempt to work on a live backplane.
- Put on a grounded ESD-safe wrist strap before touching the new hardware card to avoid static damage to the internal CMOS components.
- Prior to removal, connect to the old CPU with Proficy Machine Edition or VersaPro and perform a full upload of the register configuration (%R, %I, %Q) and logic code.
Stage 2: Removal
- Locate the CPU card in Slot 1 (directly adjacent to the power supply module on the baseplate).
- Squeeze the plastic clips at the top and bottom of the module housing to release the mechanical latch.
- Pull the CPU card straight out toward you, keeping it perpendicular to the backplane to prevent bending any of the high-density connection pins.
Stage 3: Installation (Clone & Seat)
- Inspect the connector pins on the back of the new IC693CPU350 module to ensure they are perfectly straight.
- Slide the module into Slot 1 of the chassis baseplate along the guide tracks.
- Apply firm, even pressure to the top and bottom of the module faceplate until the retaining clips click securely into place.
Stage 4: Power-On & Testing
- Restore main line power to the system power supply module.
- Verify the CPU’s OK indicator turns solid green. If the indicator flashes or remains off, immediately cycle power and inspect the backplane seating.
- Connect your programming cable to the power supply port, download the archived configuration logic, and place the processor in RUN mode to confirm system communication is restored.
6. Firmware/Software Versions & Upgrade Notes
- Firmware Baselines: The IC693CPU350 has gone through multiple firmware iterations, with version 10.60 being the highly stable, final-phase production release.
- Math Support Note: If your logic utilizes advanced calculations, ensure the CPU is loaded with Firmware Release 9.00 or higher, which introduces native firmware-based Floating Point Math support.
- Compatibility Risk Profile: Upgrading or downgrading firmware during a hardware swap can result in program verification failures. Always verify that the hardware version suffix (e.g., changing from a “-CG” to a newer revision) aligns with your software configuration settings in Proficy Machine Edition to avoid configuration mismatches.
7. Frequently Asked Questions (FAQ)
- Q: This product is listed as New Surplus. Is this just a cleaned-up, used module?
- A: Absolutely not. This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. These modules are pristine, zero-runtime units sourced from unfulfilled projects or strategic spares reserves. The static barrier wrap is only opened under cleanroom conditions for our standard physical Quality Control inspections.
- Q: Why does the pricing reflect a premium compared to common refurbished cards?
- A: Our pricing reflects the cost of securing genuine New Surplus inventory globally. It may be 20-30% higher than a refurbished gamble, but it is substantially less than OEM list prices, and it buys you 100% peace of mind. Refurbished CPU modules often carry degraded internal memory chips and aged capacitors that fail prematurely under thermal stress. Our New Surplus inventory ensures an optimal 10-15 year lifecycle profile.
- Q: How does this CPU handle communication if there is no built-in RJ-45 Ethernet port?
- A: The CPU utilizes the integrated RS-485 serial port located on the system power supply module for direct SNP/SNP-X communications. For Ethernet, Profibus, or Genius network requirements, you must pair the IC693CPU350 with a dedicated, rack-mounted option module (such as the IC693CMM321 for Ethernet).
- Q: Is the user program memory on this module volatile or non-volatile?
- A: The module contains RAM memory that requires a continuous backplane battery source (located in the power supply module) to retain logic programs when powered down. However, the IC693CPU350 also features internal Flash memory, allowing you to write your control logic permanently to non-volatile storage to safeguard against battery failures.
- Q: Can I hot-swap this CPU while the rack is powered up if the process is critical?
- A: No. Under no circumstances should the CPU module be removed or inserted while the backplane is energized. Attempting to hot-swap the processor will likely cause a catastrophic backplane logic short, potentially destroying both the CPU and adjacent I/O modules.
- Q: What warranty coverage do you provide on this legacy processor?
- A: We back this IC693CPU350 with a comprehensive 1-year replacement warranty. If the module experiences any functional failures within 12 months, we will replace the unit immediately, offering the long-term operational security that used hardware sellers cannot provide.



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