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Key Technical Specifications
| Parameter | Value |
|---|---|
| Catalog Number | IC693CHS398G |
| Manufacturer | GE Fanuc / General Electric |
| Product Family | Series 90-30 |
| Baseplate Type | 5-slot EMI-enhanced expansion baseplate |
| CPU Capability | None |
| I/O Slots | 5 |
| Expansion Connector | 25-pin female D-type I/O Bus connector |
| Expansion Cable Distance | Up to 50 ft / 15 m |
| Internal Power Consumption | Approximately 170 mA at 5 VDC |
| Power Supply Position | Dedicated power supply position |
| Dimensions | Approximately 10.43 × 5.12 × 5.59 in |
| Dimensions, Metric | Approximately 265 × 130 × 142 mm; verify revision-specific drawing |
| Mounting | Panel mount |
| EMI Feature | EMI-enhanced baseplate version |
| System Connection | Must connect to a CPU baseplate or supported Series 90-30 rack |
| Maximum Expansion Racks | Determined by the CPU model and complete rack configuration |
| Unsupported Intelligent Modules | PCM, ADC, BEM330, and CMM311 on an expansion backplane |
| Compatible Platform | GE Fanuc Series 90-30 PLC |
| Included Hardware | Baseplate only unless the supplier lists power supply, cable, cover, or mounting hardware |
The GE Fanuc IC693CHS398G is a five-slot EMI-enhanced expansion baseplate for Series 90-30 PLC systems. It provides additional I/O positions and connects to the CPU system through a 25-pin female D-type I/O Bus connector. The baseplate is not a standalone CPU rack.
The IC693CHS398G uses approximately 170 mA from the 5 VDC system supply and occupies approximately 10.43 × 5.12 × 5.59 in. Confirm the final suffix, EMI version, expansion cable, power supply, and installed-module compatibility before ordering.
IC693CHS398G
IC693CHS398G
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Expansion rack is completely offline | Missing power supply, failed power supply, or disconnected expansion cable | ✅ High | Verify rack power and measure the 5 VDC backplane supply; inspect both cable connectors | Check the supply and cable before replacing the baseplate |
| CPU does not recognize the rack | Wrong rack configuration, cable fault, or damaged 25-pin connector | ✅ High | Compare PLC hardware configuration with the physical rack and inspect connector pins | Correct configuration and replace the cable before condemning the baseplate |
| One slot does not recognize an I/O module | Damaged slot connector, contamination, or local backplane fault | ✅ High | Test the same module in another slot with rack power removed | Replace the baseplate if the fault follows the slot |
| Several slots fail together | Backplane bus fault, insufficient supply capacity, or poor module seating | ✅ High | Check the 5 VDC rail under load and reseat modules after isolating power | Calculate total rack load and inspect the backplane |
| Rack resets during output operation | Power supply sag, excessive module load, or loose power connection | ✅ Medium | Trend the 5 VDC rail while changing outputs and check power-supply terminals | Correct power distribution before replacing the baseplate |
| Communication is intermittent | Loose expansion cable, EMI, vibration, or poor cabinet grounding | ✅ Medium | Inspect cable latches and screws; check grounding and route separation from motor cables | Secure the rack and cable, then improve grounding and cable routing |
| Rack is installed too far from the CPU | Expansion cable run exceeds the supported distance | ✅ High | Measure the complete cable route between CPU and expansion baseplates | Keep the connection within approximately 50 ft / 15 m |
| CPU or restricted option module is installed here | Expansion-baseplate compatibility limitation | ✅ High | Check the module catalog number against the Series 90-30 hardware manual | Move unsupported modules to the CPU baseplate |
| New unit does not fit the cabinet | Wrong 10-slot baseplate or incorrect mounting dimensions | ✅ High | Compare the baseplate length, mounting holes, connector location, and slot count | Match IC693CHS398G exactly; do not substitute IC693CHS392 |
| EMI-sensitive signals remain unstable | Cable shielding, cabinet grounding, or external noise source | ❌ Low | Check shield termination, cabinet bonding, and noise near the expansion cable | Resolve installation noise before replacing the backplane |
If the fault remains unclear, contact technical support with photos of the baseplate label, EMI markings, power supply, expansion cable, connector, slot layout, PLC configuration, and diagnostic logs.
Frequently Asked Questions (FAQ)
What is the IC693CHS398G?
The IC693CHS398G is a five-slot EMI-enhanced expansion baseplate for the GE Fanuc Series 90-30 PLC. It adds I/O capacity to a system controlled by a separate CPU baseplate.
Can the operate by itself?
No. It requires a CPU baseplate, CPU, power supply, and compatible expansion connection. Installing modules on the without a CPU system will not create a functioning PLC rack.
What is the difference between IC693CHS398 and ?
Both are five-slot Series 90-30 expansion baseplates. The “G” suffix identifies an EMI-enhanced version in supplier listings, so match the suffix when replacing equipment in a noise-sensitive cabinet.
How far can I install this baseplate from the CPU rack?
The expansion connection is limited to approximately 50 ft / 15 m. Use the correct Series 90-30 expansion cable and keep the route away from high-current motor and contactor wiring.
Which modules should not be installed on this expansion baseplate?
The Series 90-30 manual identifies PCM, ADC, BEM330, and CMM311 as modules that must be installed in a CPU baseplate rather than an expansion backplane. Verify the complete module list before finalizing the rack layout.
Does the include a power supply?
Normally, the catalog number identifies the baseplate only. Confirm whether the seller includes the power supply, expansion cable, rack cover, mounting hardware, and any installed modules.
Why is this baseplate cheaper than a factory replacement?
The is a legacy Series 90-30 component commonly sourced through used, surplus, or refurbished inventory. Confirm the exact condition, EMI version, connector condition, test procedure, warranty, and return terms before purchase.
