Product Core Brief
- Model: VMIVME-7807
- Brand: GE
- Series: VMIVME Pentium M VME Single Board Computer Platform
- Core Function: 6U VME64x single-slot embedded CPU executing real-time control logic for gas/steam turbine Mark V control racks
- Product Type: Passive-cooled VMEbus single board computer (SBC)
- Key Specs: Up to 1.8 GHz Pentium M | 1.5 GB max DDR SDRAM | Dual Gigabit Ethernet | PMC PCI-X expansion ⚠️ EOL — limited stock remaining
Product Introduction
GE runs deterministic embedded OS workloads on VME64x backplanes, processing turbine PT/CT data and hosting SCADA communications for legacy power generation racks. This unit differs from the VMIVME-7807RC variant by removing ruggedized conformal coating and industrial extended temperature support. It delivers 400 MHz front-side bus throughput and holds 32 KB battery-backed SRAM for critical trip setpoint storage.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Central processor | Intel Pentium M (1.1 / 1.6 / 1.8 GHz); 1–2 MB L2 cache |
| System chipset | Intel 855GME with 400 MHz front-side bus |
| Maximum system memory | 1.5 GB total DDR SDRAM (512 MB soldered + 1 GB SODIMM) |
| Non-volatile storage | 32 KB battery-backed SRAM; up to 2 GB bootable CompactFlash |
| VMEbus compliance | VME64x, 2eVME, 2eSST high-speed data transfer |
| Network controllers | 1x 10/100 Mbps Fast Ethernet; 1x 10/100/1000 Mbps Gigabit Ethernet |
| Serial communication ports | 4x 16550 UART (1 front RS232, 3 rear P2 routed) |
| USB 2.0 allocation | 2 front panel ports, 2 rear P2 routed ports |
| Expansion slot | Single 66 MHz PCI-X PMC site for custom I/O add-ons |
| Video outputs | Front VGA, rear DVI-D dual-head integrated graphics |
| Operating cabinet temperature | 0 °C to +60 °C sealed enclosure |
| Storage temperature range | -40 °C to +85 °C |
| Mechanical form factor | Standard 6U single-slot VME Eurocard |
| Net unit weight | 0.78 kg |
| Supported operating systems | VxWorks, QNX, Linux, Windows XP Embedded |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Cross-reference serial numbers against GE Mark V spare asset database to flag counterfeit hardware. Inspect front panel RJ45, serial, and USB ports with a 10x magnifier for bent pins or cracked PCB traces; log serial numbers for power plant traceability.
- Live Functional Test: Install the unit on a VME64x test backplane paired with analog turbine signal I/O boards. Run continuous 26-hour load testing while logging cabinet temperature swings and verifying dual Ethernet packet transmission at 100 % throughput.
- Electrical Parameter Test: Use a 500 V Megger to measure insulation resistance between signal traces and chassis ground; pass threshold set at >10 MΩ. Verify PE protective ground loop resistance below 0.5 Ω with a Fluke 115 multimeter.
- Firmware Verification: Extract and record BIOS boot revision printed on PCB silkscreen. Photograph VME system controller DIP switch and battery header positions for field commissioning reference.
- Final QC & Packaging: Wipe front panel connectors with anti-static microfiber cloth, cap all Ethernet and serial ports with plastic dust covers. Seal inside a shielding ESD bag, attach a QC Passed label stamped with full test completion date.
Replacement Pitfall Guide
❗ Firmware Mismatch: BIOS v1.4 drops backward compatibility with Mark V rack VxWorks v5.4 runtime builds. Match exact BIOS and OS firmware versions before rack power-up, or all turbine control logic will fail POST and lock at boot screen indefinitely. ❗ DIP Switch / Jumper Misconfiguration: Factory default VME system controller switch is disabled. Most multi-CPU turbine racks require the controller enabled on the leftmost slot; missed settings create cyclic VME bus timeouts and missing analog process values. ❗ Terminal / Cable Incompatibility: This unit uses standard RJ45 Ethernet pinout, unlike older VMIVME-7600 series D-Sub bus connectors. Unshielded CAT5 cabling routed alongside power wiring generates periodic Ethernet packet retries; shield drain wires must land on dedicated rack ground bars only. ❗ Power Supply Mismatch: Full CPU + dual Ethernet peak draw hits 32 W. Calculate rack power budget with 20 % overhead; undersized 5 V / 3.3 V backplane supplies trigger under-voltage shutdown and corrupted CompactFlash boot images. ❗ ESD Damage: Dry cabinet environments above 40 % relative static risk degrade onboard Ethernet PHY and memory controller chips on the unit. Always use an anti-static mat and grounded wrist strap when accessing exposed PCB edge connectors and memory sockets. Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
Compatibility Matrix
- VMIVME-7807RC → : Needs Adaptation — RC variant has wider temperature range, conformal coating absent on base unit
- VMIVME-7614 → : Incompatible — PowerPC architecture, no shared VME memory mapping
- Mark V VME64x Backplane → : Direct — pinout fully compatible, minor boot device parameter reconfiguration required
