XYCOM XVME-973/1 Product Detailed Description

I. Product Overview

XYCOM XVME-973/1 (now belonging to Acromag/Xembedded) is a 6U single-height VME bus external driver adapter module, specially designed for Xycom XVME-653/658 and other PC/AT architecture VME processor modules. As a dedicated interface bridge between external storage devices (hard drives, floppy drives) and VME systems, it realizes the signal conversion and system integration of external IDE hard drives and floppy drive controllers, and is suitable for scenarios in industrial automation, embedded measurement and control, and data recording systems that require external large-capacity storage or removable media. It is the core adapter unit for extending external storage in VME systems.

II. Core Hardware Configuration

(1) Form and Bus Specifications

Size Specification: 6U single-height VME module, occupying only 1 standard VME slot, compatible with standard 6U VME chassis P1 (power / signal), P2 (extended I/O) connectors, saving chassis slot resources.

Bus Compatibility: Strictly follows VMEbus IEEE 1014 standard, directly communicating with XVME-653/658 processor module through P2 backplane connector, transmitting IDE hard drive and floppy drive control signals, without the need for additional bridge chips.

(2) External Storage Interface (Core Function)

The module provides 3 external storage device connectors, all front-mounted for wiring convenience, without backplane connection, and the signal transmission is more stable:

P1 connector (hard drive interface): supports connecting 2 3.5-inch IDE hard drives, standard 40-pin IDE interface, compatible with PIO/DMA transmission mode, suitable for large-capacity external storage expansion; note: Hard drive power supply needs to be externally connected, the module does not supply power.

P2 connector (VME backplane interface): directly connects to the VME chassis backplane P2, achieving signal interaction with the processor module, transmitting hard drive / floppy drive control and data signals.

P3 connector (floppy drive interface): supports connecting 1 3.5-inch 1.44MB standard floppy drive, 34-pin floppy drive interface, suitable for removable media data backup and program update; floppy drive power supply also needs to be externally connected.

(3) Power Supply and Power Consumption

Power Supply Method: Obtaining +5V, ±12V power supply from the VME backplane P1 connector, only supplying power to the module's control circuit, external hard drives and floppy drives need to be externally powered.

Power Consumption Parameters: Module's own idle power consumption ≤ 3W, full load (driving 2 hard drives + floppy drive) ≤ 5W, low power consumption design, does not increase the burden on the chassis cooling.

(4) Physical and Front Panel Design

Size: 165mm × 20mm × 115mm (length × width × height), standard 6U single-height size, compatible with all mainstream 6U VME chassis.

Weight: Approximately 250g, lightweight industrial-grade reinforced design, shock-resistant and anti-drop, convenient for installation and maintenance.

Front Panel: Equipped with P1 (hard drive), P3 (floppy drive) interfaces and status LED indicators (power, hard drive read/write, floppy drive read/write), real-time monitoring of external storage device operation status; interfaces with dust-proof protection covers, suitable for industrial dust environments.

III. Environmental Adaptability and Reliability

(1) Temperature Range

Operating Temperature: Standard industrial grade 0℃~55℃; wide temperature customized version **-25℃~70℃**, suitable for outdoor, vehicle-mounted, military-grade, etc., harsh conditions without air conditioning.

Storage Temperature: -40℃~+85℃, long-term storage or transportation without risk of component damage, ensuring spare parts reliability.

(2) Protection and Anti-interference Protection level: Front panel IP30, dust-proof and splash-proof water-resistant, suitable for dusty and oily industrial environments; all interfaces are shielded to suppress external electromagnetic interference.

Vibration / Shock Resistance: Industrial-grade reinforced welding, working state can withstand vibration of 5-500Hz and 2g acceleration, shock resistance of 20g peak; non-working state can withstand shock of 50g, suitable for strong vibration scenarios such as machine tools, production lines, and vehicle-mounted applications.

Electromagnetic Compatibility (EMC): Compliant with IEC 61000-6-2 standard, board-mounted EMI filtering circuit, effectively suppressing static electricity, surge, and high-frequency electromagnetic interference, enabling stable operation near frequency converters and high-voltage equipment.

(III) Hardware Reliability

Industrial-grade components: Core chips and connectors use military-grade / industrial-grade components, fully welded process, reducing the risk of false soldering and detachment, MTBF ≥ 120,000 hours, supporting 15-year long-term continuous operation.

Signal Integrity Optimization: Board line impedance matching design, no attenuation in IDE / floppy drive signal transmission, stable even when connecting external devices over long distances, avoiding data read/write errors.

Overvoltage / Overcurrent Protection: Board-mounted power filter and transient suppression circuit, protecting the module itself and external storage devices from voltage fluctuations and surge impacts.

IV. Core Functions and Features

(1) Special External Storage Compatibility

Designed specifically for XVME-653/658 processor modules, the only single-slot adapter module that realizes the external connection of two IDE hard disks + one floppy drive in the VME system, solving the pain point of the processor module having no native external storage interface, with high flexibility for expansion.

(2) Standard Protocol Plug-and-Play

Fully compatible with PC/AT IDE protocol and floppy drive protocol, no need for additional drivers or configuration, the system automatically identifies connected external devices, compatible with mainstream operating systems such as MS-DOS, VxWorks, embedded Linux, QNX, etc., reducing the threshold for secondary development.

(3) Single Slot High-Density Expansion

6U single-high design, only occupying 1 slot can simultaneously expand 2 hard disks + 1 floppy drive, balancing large-capacity fixed storage and removable medium backup, saving chassis slots, simplifying system wiring, suitable for compact VME systems.

(4) Flexible External Storage Combination

Supports various device connection combinations: dual hard disks, single hard disk + floppy drive, only floppy drive, as needed to adapt to different scenarios (such as choosing dual hard disks for big data storage, choosing floppy drive for offline backup), enhancing system adaptability.

(5) Long Lifecycle Support

As a classic VME external storage adapter module, Acromag/Xycom provides long-term spare parts supply and technical support, suitable for industrial equipment with a 10-15-year service life, widely used for external storage upgrade and maintenance of existing VME systems.

V. Typical Application Scenarios

Industrial Automation: External storage for large-capacity data storage in production lines, historical log recording in DCS systems, backup storage unit for PLC replacement systems.

Embedded Measurement and Control: External hard disk cache for high-speed data acquisition systems, removable medium program update for instrument control units, data backup equipment for laboratory automation devices.

Military / Aviation: External storage expansion for vehicle measurement control systems, data recording unit for airborne ground test equipment, external storage expansion for radar preprocessing systems.

Transportation / Energy: Storage for rail transit vehicle control units, data backup for wind power / photovoltaic field equipment monitoring, offline data storage for smart grid monitoring devices.

Existing Equipment Maintenance: Expansion of external hard disks / floppy drives for aging VME industrial equipment (such as CNC machines, industrial robots), solving the problem of insufficient storage capacity or lack of backup interfaces, extending equipment service life. VI. Model Selection and Compatibility Instructions

(1) Model Definition

Base model: XVME-973/1 (6U single-height, external hard drive + floppy drive adapter module, no onboard storage).

Temperature versions: Standard temperature (0℃~55℃), wide temperature (-25℃~70℃).

(2) Compatible Processor Modules

Only compatible with Xycom PC/AT architecture VME processor modules:

Core compatibility: XVME-653, XVME-658.

Compatible expansion: XVME-655, XVME-675, XVME-688, XVME-690 (confirm compatibility of backplane P2 signals).

(3) Compatible Enclosures and External Devices

Enclosure: Standard 6U VME enclosure (VME64/VME64x), requires 1 single-height slot, supports P1, P2 connectors.

External devices: 3.5-inch IDE hard drive (≤2 units), 3.5-inch 1.44MB floppy drive (≤1 unit), devices need independent external power supply.

VII. Maintenance and Precautions

Before installation, cut off the power supply of the enclosure. Do not perform hot-plugging of modules or external storage devices. Avoid instantaneous current shock that may damage module interfaces or external devices; during installation, gently insert and push, ensure that the P1/P2 connectors are fully engaged, and tighten the fixing screws to prevent vibration loosening.

External hard drives and floppy drives need to be externally connected to a stable power supply to avoid read/write errors or equipment damage due to insufficient power supply; when wiring, distinguish the positive and negative poles of the power supply to prevent short circuits.

Regularly check the LED indicators on the front panel: a constantly lit power indicator indicates normal module power supply, a flashing indicator for hard drive/floppy drive indicates normal read/write; if the fault indicator is constantly lit, power off and troubleshoot interface connections, external device power supply, or module hardware status.

The floppy drive magnetic head should be cleaned with a dedicated cleaning floppy disk once every 6 months to prevent magnetic head dirt from causing read/write failures; the hard drive should avoid frequent power off and restarts to reduce magnetic head wear and extend service life.

During long-term operation, keep the enclosure ventilation good, regularly clean dust from the module surface, interfaces, and the cooling channel of the enclosure to avoid interface contact failure or communication abnormalities due to high temperature or dust.

Avoid using in strong corrosive or strong magnetic environments. Strong magnetic fields may cause data loss on the hard drive; during transportation, avoid severe impacts to prevent connector and component damage.