GE VME-7807RC
GE VME-7807RC
GE VME-7807RC
GE VME-7807RC
GE VME-7807RC

GE VME-7807RC | 6U VMEbus Pentium M SBC – Field Service Notes

  • Model: VME-7807RC (also VMIVME-7807RC)
  • Manufacturer: GE Fanuc / Abaco Systems
  • Hardware Type: 6U single-slot VMEbus single-board computer (SBC)
  • Key Feature: High-performance Pentium M, passive cooling, dual GigE, PMC expansion
  • Primary Field Use: Mark VIe turbine control, DCS node, plant VME rack master
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Part number: GE VME-7807RC
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Description

Hard-Numbers: Technical Specifications

  • Processor: Intel Pentium M (1.1/1.4/1.8 GHz; common 1.8 GHz)
  • Chipset: Intel 855GME + ICH4
  • Memory: Up to 1.5 GB DDR SDRAM (SODIMM + onboard 512MB)
  • VME Bus: VME64x, master/slave, bus arbitration, VITA 1.5
  • Ethernet: 2×10/100/1000 Gigabit (Intel 82546GB) + 1×10/100 Mbps
  • Local I/O: 4×USB 2.0, 4×RS-232, SVGA, DVI-I, PS/2
  • Storage: CompactFlash (up to 2 GB), Ultra ATA/100 IDE
  • Expansion: 3.3V PMC (PCI-X, 66 MHz) mezzanine slot
  • Operating Temp: 0°C to +55°C (commercial; -40°C to +85°C option)
  • Power Draw: ~28W @ 5VDC
  • Cooling: Passive heat sink (no moving parts)
  • Dimensions: 6U (233×160×30 mm)
GE VME-7807RC

GE VME-7807RC

The Real-World Problem It Solves

Legacy VME CPUs lack power for modern Mark VIe firmware, high-speed data logging, and dual-network segmentation. Single-core, fan-cooled designs suffer from vibration/ dust failures and thermal throttling.

Where you’ll typically find it:

  • Power plant Mark VIe turbine control cabinets (gas/steam)
  • Refinery/chemical plant DCS racks with high analog I/O throughput
  • Factory VME chassis needing fanless reliability and PMC I/O expansion

Bottom line: It’s a high-performance, drop-in VME SBC for critical control racks needing dual GigE, passive cooling, and PMC flexibility.

 

Hardware Architecture & Under-the-Hood Logic

  1. Pentium M Core: Runs control loops, firmware, and network processing; low power for passive cooling.
  2. 855GME Chipset: Manages memory, video (SVGA/DVI-I), and IDE storage.
  3. VME Bridge: Dedicated IC handles backplane arbitration, interrupts, and block transfers.
  4. Dual GigE: Isolates control and plant LAN traffic via Intel 82546GB controllers.
  5. PMC Slot: Adds site-specific I/O (e.g., analog, serial) via 66 MHz PCI-X.
  6. Watchdog/NV-RAM: 32KB nonvolatile RAM + watchdog timer for fault recovery.

 

Field Service Pitfalls: What Rookies Get Wrong

Forgetting It’s a Single-Slot 6U BoardRookies force it into dual-slot chassis or misalign P2 connectors → bent pins, no VME communication.

  • Field Rule: Use standard 6U single-slot VME chassis; fully seat and lock both ejectors.

Overlooking Cooling ClearanceCables/ducts block the heat sink → thermal throttling, random resets, premature aging.

  • Quick Fix: Keep ≥25mm clear above heat sink; clean cabinet filters every 90 days.

Mismatched PMC VoltageInserting 5V PMC modules fries the 3.3V-only PCI-X interface.

  • Field Rule: Only use 3.3V-keyed PMC cards; never hot-swap with rack power on.

Ignoring VME Arbiter ConflictsMultiple masters enabled → bus collisions, I/O drops, intermittent comms.

  • Field Rule: Designate Slot 1 as system controller; disable master mode on other SBCs.
    GE VME-7807RC

    GE VME-7807RC

 

Commercial Availability & Pricing Note

Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.

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