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Key Technical Specifications
- Processor: Intel Pentium III up to 1.26 GHz
- Memory: Up to 512 MB SDRAM
- Expansion: Up to 3 PMC expansion sites
- Bus Interface: VMEbus 6U, dual-slot form factor
- Ethernet: Dual Ethernet controllers
- Storage: Up to 1 GB CompactFlash support
- Serial Ports: 2 serial ports
- Graphics: On-board AGP SVGA controller
- System Bus: 133 MHz
- Power: VME backplane powered
- Application: Industrial automation, embedded control, data acquisition
Product Introduction
GE VMIVME-7751 is a dual-slot VMEbus single-board computer used in legacy industrial control and embedded automation systems. It combines a Pentium III processor with VME architecture, dual Ethernet, serial ports, and PMC expansion for rack-based control platforms that still need exact hardware continuity.
This board is typically chosen when a plant or test system must keep an older VME stack running without requalifying the software and I/O layout. The main value is compatibility with existing backplanes, peripherals, and application code, but you should still verify the exact revision, memory configuration, and installed options before swapping it in.
- VMIVME-7751
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No boot activity | Backplane power problem or failed seating | ✅ High | Measure VME rail voltages and reseat the board | Check rack power and connectors first |
| Boots but no Ethernet link | Cable issue, switch issue, or NIC fault | ⚠️ Medium | Test with a known-good cable and port | Rule out field wiring before replacing the SBC |
| OS loads but I/O does not respond | VME configuration mismatch | ✅ High | Verify slot settings, address maps, and software config | Match the legacy setup exactly |
| Random resets under load | Thermal or power instability | ✅ High | Monitor temperature and supply stability during runtime | Check airflow and power margin |
| PMC card not detected | PMC seating or compatibility issue | ✅ High | Reseat the PMC card and check support in software | Verify the PMC module and driver support |
| Serial port communication fails | Baud, parity, or pinout mismatch | ⚠️ Medium | Loopback the COM port and confirm cable wiring | Check the cable before blaming the board |
| Intermittent boot failure after swap | Jumper or firmware mismatch | ✅ High | Photograph the original board settings before removal | Mirror the old configuration exactly |
Contact technical support with photos of the board, jumper positions, and diagnostic logs if the fault is still unclear.
Frequently Asked Questions
Q: Is VMIVME-7751 still available new?
A: Usually not. This is a legacy VME SBC, so most stock on the market is surplus or refurbished inventory rather than fresh OEM production.
Q: Can I use this as a direct replacement for my old VME CPU board?
A: Often yes, if your system already uses the same VMIVME-7751 family and the software stack matches. Still, check the revision, memory option, PMC cards, and backplane power before you commit.
Q: Is it hot-swappable?
A: No. Power down the rack before handling it. Pulling a VME SBC live is asking for a backplane fault or a dead board.
Q: Will it keep my existing configuration?
A: Not automatically. You need to verify the jumper settings, boot source, memory option, and any PMC dependencies, then mirror the original hardware setup.
Q: Why is this cheaper than a new controller?
A: Because it is typically surplus inventory from a discontinued platform. The price reflects availability, not a downgrade in specification.
Q: What should I check before ordering?
A: Confirm the exact part number, CPU speed, memory size, slot width, and any installed PMC options. Also make sure your application still supports the old VME architecture without extra rework.
Q: Is this an obsolete part?
A: Yes. Treat it as obsolete legacy VME stock with limited availability, which means exact-match replacement is the safest path.
