Component Snapshot At-a-Glance
- Model: GE VMIVME-7452 (Former VMIC, later Abaco VME-7452; variant suffix -505 industrial rugged version)
- Alt. P/N: VMIVME-7451 (SCSI storage variant); VMIVME-7460 (Flash-only VME storage board); VMIVME-7750 (VME single board CPU, unrelated storage)
- Product Series: GE VMIC / Abaco VMEbus 6U Eurocard embedded industrial control module family
- Hardware Type: Standard 6U double-height single-slot passive VME carrier PCB, rear P1/P2 VME backplane connectors, front drive bays for mechanical storage media, IDE/floppy internal ribbon headers
- Key Feature: Passive non-processing storage carrier, supports 2.5” IDE hard disk + 3.5” 1.44MB floppy drive simultaneously, optional industrial flash disk upgrade, low power draw, no onboard CPU/logic chips
- Primary Field Use: Add persistent local disk storage to VME single-board CPU systems; store VxWorks/Linux real-time OS, control logic firmware, process trend logs for power plant turbine control, military embedded test systems, industrial DCS embedded racks.
Hard-Numbers: Technical Specifications
- Protocol Support: VMEbus Rev C.1 parallel backplane, IDE ATA storage bus, standard floppy disk interface; no onboard fieldbus/network logic
- Port Count: Rear P1/P2 VME system connector, internal 40-pin IDE header, 34-pin floppy ribbon header, front mechanical drive bays
- Data Transfer Rate: IDE burst up to 16MB/s; floppy disk 500KB/s max transfer speed
- Operating Temperature: 0°C ~ +55°C cabinet operational; -40°C ~ +85°C storage
- Isolation Rating: Basic PCB trace separation, no galvanic isolation (passive storage carrier)
- Power Draw: Max 8W total with HDD + floppy populated; passive board draws <1W idle without drives
- VME Bus Power Input: Standard VME rack +5V / ±12V backplane power rails
- Supported Storage: 2.5” IDE PATA hard disk (max 60GB factory rated), 3.5” 1.44MB floppy, optional IDE flash disk replacement
- Form Factor: 6U VME single slot, dimensions 160 × 233.25 × 20.32 mm
- EMC Compliance: CE Class A industrial control cabinet EMI tolerance, shock/vibration rated for rack-mounted embedded systems
- PCB Treatment: Conformal coated anti-humidity PCB for power station, shipboard and military rugged environments
- Physical Weight: 0.68kg fully loaded with HDD + floppy drive
The Real-World Problem It Solves
VME single-board CPUs ship with limited onboard flash memory; storing large control firmware, historical trend logs and diagnostic software requires external disk expansion.Separate external disk enclosures require extra cabinet space and long external ribbon cables prone to vibration damage in turbine/military racks. This single-slot VME carrier integrates both hard disk and floppy directly into the VME rack without external wiring.Floppy drive bay enables offline firmware backup, OS image restore and field calibration without network access for isolated safety control systems.Where you’ll typically find it:
- Fossil power plant turbine & boiler VME embedded control racks running VxWorks real-time control
- Military vehicle/shipboard embedded test & instrumentation VME systems
- Pulp & paper mill legacy VMIC VME DCS embedded controller racks
- Railway signaling industrial VME real-time monitoring cabinetsThis passive storage carrier eliminates bulky external disk enclosures, consolidates local OS/log storage in one VME slot, and retains legacy floppy media support for offline field maintenance on legacy VME control hardware.
Hardware Architecture & Under-the-Hood Logic
This is a fully passive carrier board with zero processing MCU or logic chips; it only routes VME backplane power and user-defined P2 signals to IDE/floppy storage interfaces, all disk access logic resides on the host VME SBC CPU card.
- VME rack backplane P1 connector pulls standard +5V/±12V power rails to power HDD and floppy drive bays.
- P2 user-defined VME pins route IDE control/data signals between the host single-board CPU and front-mounted hard disk drive.
- Dedicated 34-pin ribbon header routes floppy disk control signals from VME P2 expansion pins to front floppy bay.
- No onboard signal conversion or buffering; direct passive trace routing minimizes latency for real-time OS disk I/O.
- Front panel mechanical ejection latches for quick HDD/floppy swap without full module extraction from the VME rack chassis.
Field Service Pitfalls: What Rookies Get Wrong
Swapping VMIVME-7451 SCSI Storage Or VMIVME-7460 Flash-Only Boards In Place Of
New technicians substitute alternate VME storage carriers without matching full part number. VMIVME-7451 uses SCSI interface incompatible with standard IDE host CPUs; VMIVME-7460 lacks floppy drive hardware, eliminating offline firmware restore capability for field maintenance.Field Rule: Only deploy for systems requiring both IDE hard disk + floppy media support; segregate SCSI/flash-only storage spares in separate labeled storage bins.
Hot-Swapping Module While VME Rack Power Remains Energized
Junior crews extract the carrier while the VME chassis stays powered. Hot removal creates backplane power rail transients that corrupt the host SBC CPU OS image and trigger full control system crash.Quick Fix: Fully power down the VME rack chassis breaker, wait 30s for backplane rail discharge before extracting or inserting the storage module.
Mixing SATA HDDs Into IDE Carrier Bay
Field crews install modern SATA hard drives into the 2.5” IDE bay. SATA electrical pinout mismatch causes no disk detection and risks damaging the host VME CPU IDE controller circuitry.Field Rule: Only use PATA IDE 2.5” hard disks or IDE flash replacement drives compatible with ; SATA media is not electrically supported.
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.
