Description
The VMIVME-7452 is a specialized 6U single-slot VMEbus storage module originally engineered by VMIC (later acquired by GE Fanuc / Abaco Systems). Designed to provide reliable mass storage for embedded VME single-board computers (such as the VMIVME-7750), this module supports flexible configurations combining hard disk drives, floppy drives, or solid-state flash memory options.
Product Specifications (Datasheet)
- Brand / Manufacturer: GE Fanuc / VMIC (Abaco Systems)
- Model / Part Number: VMIVME-7452 Series
- Product Name: VMEbus Floppy / Hard Disk / Flash Storage Module
- Form Factor: Standard VME 6U single-slot Eurocard module (Height: 9.2 in / Depth: 6.3 in)
- Storage Options: Configurable with a 3.5-inch 1.44 MB floppy drive, high-capacity IDE hard disk drives (ranging up to 60 GB depending on exact suffix), or solid-state flash memory drives.
- Bus Interface: Passive VME board utilizing P2 user-defined pins for power, ground, and IDE signals interfacing directly with the host Single Board Computer (SBC).
- Cabling Interfaces: Internal 40-pin IDE and 34-pin floppy connectors; interfaces with adjacent SBCs typically via standard ribbon cable assemblies (such as the VMXC-3 or VMXC-H cables).
- Power Requirements: +5 VDC (and +3.3 VDC for flash options), <1.0 A typical operating draw.
Operating Guidelines and Usage Methods
Proper integration and handling of VME storage modules require strict adherence to electronic safety and rack installation procedures.
- ESD Precautions: Always utilize a certified grounded electrostatic discharge (ESD) wrist strap when handling the board to protect sensitive internal storage controllers and circuit components from static damage.
- Rack Seating & Interconnection: Align the module carefully within the VME chassis card guides. Ensure that internal ribbon cables linking the module’s IDE/floppy interface to the host processor board (via P2 pins or front/rear connectors) are securely fastened.
- Environmental Protection: Because mechanical hard drives and floppy disk drives contain sensitive moving parts, operate the host chassis within a clean, vibration-controlled environment protected from excessive dust and extreme temperature swings.
Power-On and Power-Off Sequence
Adhering to correct energization protocols prevents data corruption and safeguards internal storage media.
- Power-On Sequence:
- Verify that the VMIVME-7452 module is securely seated in its designated VME rack slot and internal IDE/floppy interface cables are properly linked to the processor board.
- Switch on the primary rack power supply feeding the system enclosure.
- Monitor the system boot sequence to confirm that the host SBC successfully detects and initializes the storage drives.
- Power-Off Sequence:
- Gracefully shut down the operating system via software commands to ensure all file write operations are completed and disk heads are parked.
- Power down the main electrical feeds supplying the VME rack enclosure.
- Allow internal circuits to fully de-energize before unseating or servicing the module.
Product Instructions
The VMIVME-7452 acts as a peripheral storage carrier within a VMEbus computer rack. When replacing or configuring a unit, verify that the configuration suffix matches your system requirements (e.g., whether it relies on flash memory, a hard drive, or a floppy drive for boot/storage functions). Note that factory guidelines advise caution when using flash options with operating systems that perform excessive background disk writing, to preserve flash endurance limits.
Frequently Asked Questions (Q&A)
- Q: What system utilizes the VMIVME-7452 module?
- A: It is deployed within VMEbus industrial computer racks alongside GE Fanuc / VMIC single-board computers requiring legacy or robust local storage (such as MS-DOS, QNX, or Windows NT environments).
- Q: How does the module communicate with the processor board?
- A: It is a passive VME board that routes IDE and floppy control signals through the chassis P2 user-defined backplane pins or dedicated ribbon cables connected to the host SBC.
- DQ: What should I check first if the system fails to recognize the storage drive?
- A: Verify the physical seating of the module in the VME rack, inspect the internal IDE/floppy cable connections to the processor board, and check the rack +5V power rails.
