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

GE VME-7851RC | 6U Dual Slot VME Single Board Computer – Field Service Notes

  • Model: GE VME-7851RC
  • Alt. P/N: VMIVME-7851RC
  • Product Series: GE Fanuc Legacy VME Control Platform
  • Hardware Type: 6U dual-depth VME single board computer
  • Key Feature: Three onboard PMC slots for high-density custom I/O expansion
  • Primary Field Use: Dedicated rack CPU and bus controller for stationary turbine and balance-of-plant control systems
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Part number: GE VME-7851RC
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Description

Hard-Numbers: Technical Specifications

  • Processor: Intel Pentium 4-M @ 2.2GHz
  • Chipset: Intel 852GME + ICH4 southbridge
  • Max Memory: 1GB DDR SDRAM onboard expandable
  • VME Protocol: VME64, Universe IIB bridge, master/slave arbitration
  • Network Ports: 1×Gigabit Ethernet, 1×10/100 Fast Ethernet
  • Expansion: 3×3.3V PCI-X PMC mezzanine interfaces
  • Local I/O: DVI-I video, RS-232 serial, USB 2.0, IDE storage
  • Operating Temperature: 0°C to +55°C commercial rated
  • Power Draw: 30W nominal continuous load
  • Cooling: Passive heatsink, fanless fixed design
GE VME-7807RC

GE VME-7807RC

The Real-World Problem It Solves

Legacy VME racks lack sufficient onboard expansion to support custom serial, communication, and protocol conversion hardware. External adapters and third-party modules introduce electrical noise and fragile wiring in critical control cabinets.

Where you’ll typically find it:

  • GE Mark VI / Mark VIe gas and steam turbine control assemblies
  • Fossil and combined-cycle plant balance-of-plant VME control racks
  • Refinery process DCS cabinets needing multi-card PMC integration

Bottom line: It consolidates triple expansion capability onto one dual-slot CPU to eliminate messy external peripherals and stabilize backplane communication.

 

Hardware Architecture & Under-the-Hood Logic

This board functions as a slot 1 capable VME system controller with passive thermal design, built for long-duration stationary industrial operation with zero moving cooling parts.

  1. Pentium 4-M processing core runs control firmware, data logging, and network stack operations.
  2. Intel 852GME chipset governs memory allocation, video output, and onboard peripheral timing.
  3. Tundra Universe IIB bridge manages VME backplane addressing, interrupt handling, and block data transfers.
  4. Segmented PCI-X lanes supply independent bandwidth to each PMC slot to prevent expansion bus overload.
  5. Hardware watchdog and voltage monitoring circuits force hard resets during bus hangs or unstable rail conditions.
GE VME-7807RC

GE VME-7807RC

Field Service Pitfalls: What Rookies Get Wrong

Single-Slot Chassis Installation MistakeTechnicians attempt installation in standard single-width 6U slots. Forced seating cracks edge connectors and shorts backplane signal pins.

  • Field Rule: Only deploy in dual-depth VME chassis; confirm rear P0/P2 connector alignment before locking ejectors.

5V PMC Module MisinstallationUntrained staff install legacy 5V keyed PMC cards. Voltage mismatch damages on-board PCI-X regulators and permanently disables expansion ports.

  • Quick Fix: Verify 3.3V-only keying on all mezzanine cards; no exceptions for older legacy modules.

Restricted Heatsink AirflowOver-packed cabinet routing and bundled wiring block passive cooling surfaces. Sustained high heat causes thermal lockups and premature electrolytic capacitor degradation.

  • Field Rule: Maintain clear airflow across the top and side heatsink areas; inspect and replace cabinet intake filters quarterly.

 

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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