XYCOM XVME-674 Industrial-grade VMEbus PC/AT Processor Module - Detailed Product Description

I. Product Overview

XYCOM XVME-674 is a single-slot 6U VMEbus specification, PC/AT compatible embedded processor module. It was developed by XYCOM (now part of Acromag/Xembedded) and is specifically designed for outdated industrial systems, high-reliability embedded control, and extreme environment measurement and control scenarios. The module is equipped with an Intel 80486 series processor, integrated VGA display, IDE storage, serial / parallel ports, and VME bus interface. With mature and stable architecture, wide temperature operating range, and military-grade resistance to harsh environments as its core features, it is widely used in industrial automation, process control, aerospace, military, and rail transportation fields, serving as the core control unit for the upgrade and long-term operation of legacy VME systems. 

II. Core Functions and Features

(1) Classic 80486 processor, stable, reliable, and low power consumption

Equipped with Intel 80486DX 33MHz or 80486DX2 66MHz processor, with built-in 8KB on-chip cache, fully compatible with x86 architecture, capable of meeting the requirements of industrial real-time control, data processing, and logical operations, and with low power consumption design suitable for enclosed chassis and fanless scenarios.

The processor architecture is mature, without complex circuit design, with strong resistance to electromagnetic interference and voltage fluctuations, capable of long-term stable operation in dusty, humid, and vibrating harsh industrial environments, suitable for 7×24-hour non-stop operation scenarios.

Compatible with DOS, Linux, VxWorks, etc. lightweight operating systems, simple development, mature drivers, low cost for secondary development and transplantation, suitable for maintenance of old systems and function expansion.

(2) Large-capacity DRAM and flexible storage configuration

Memory: On-board 4MB/16MB/32MB DRAM (optional configuration), meeting the requirements of industrial program running, data caching, and multi-task processing, without waiting state access to local memory, ensuring low latency response for real-time tasks.

Storage: Integrated IDE hard disk controller + floppy disk controller, can directly connect 2.5-inch IDE hard disks, solid-state drives (SSD), or floppy disks, supporting local system solidification and data storage; on-board firmware Flash is used for BIOS and system configuration storage, data not lost in power-off, suitable for embedded unmanned scenarios.

(3) VMEbus bus compatibility, supports 7-level interrupts

Natively supports VMEbus IEEE 1014-1994 standard, compatible with A16/A24 address space, D16/D08 data transmission, can be used as a VME bus slave unit, seamlessly compatible with standard VME chassis and XVME full series I/O modules.

Built-in VMEbus interrupt circuit, supports **7-level interrupts (I1-I7)** and programmable interrupt request level, local CPU can generate VME bus interrupt, combined with daisy chain interrupt handling, efficiently responding to multi-module parallel events, suitable for multi-I/O concurrent control scenarios.

Single-slot 6U structure, conforms to VMEbus mechanical specifications, supports hot swapping, installation and maintenance are convenient, compatible with new and old VME systems, protecting existing hardware investment.

(4) Rich onboard I/O, plug-and-play without expansion cards

Graphics display: Integrated VGA graphics controller, supports standard VGA display output, suitable for CRT displays or industrial touch screens, front panel interface directly connected, supports local visual operation, status monitoring, and fault troubleshooting.

Serial interface: Equipped with 2 RS-232 high-speed serial ports, baud rate up to 115.2kbps, can connect terminals, sensors, PLC, serial port printers, etc., meeting industrial communication and data transmission requirements.

Parallel interface: Integrated 1 EPP/ECP parallel port, compatible with parallel port printers, scanners, or specialized industrial equipment, compatible with traditional PC peripheral interface standards.

Other features: Onboard hardware reset circuit, status indicator lights (CPU/PASS/FAIL), real-time feedback of operating status; supports headless operation mode, can be remotely configured and managed via serial port, no need for external display devices.

(5) Military-grade reinforced design, wide temperature range and high reliability

Extremely wide temperature range: standard operating temperature - 40℃～+85℃, covering extremely cold to hot industrial scenarios, able to withstand drastic temperature fluctuations; storage temperature **-55℃～+85℃**, suitable for outdoor and environments without temperature control chassis. Resistant to harsh environments: Utilizing military-grade electronic components and conformal coating, it is moisture-proof, dust-proof, and corrosion-resistant; it complies with the MIL-STD-810 vibration/impact standard (vibration 5g, impact 50g), and is suitable for mobile harsh scenarios such as vehicle-mounted, airborne, and ship-mounted.

Electrical safety: Meeting CE, FCC, and UL certifications, it conforms to the EN 61000-6-2/4 electromagnetic compatibility standard, has strong anti-static and anti-electromagnetic interference capabilities, and is suitable for strong electromagnetic industrial sites.

(6) Low power consumption and high stability, suitable for long-term operation

Power supply: Powered by +5V from the VME backplane, with typical low power consumption, no need for additional cooling, suitable for deployment in enclosed, fanless chassis, reducing operation costs.

Hardware monitoring: Onboard voltage monitoring, temperature sensors, watchdog (WDT) circuit, real-time monitoring of operating status, automatic reset in case of abnormalities, preventing system crashes; Power-on self-test (POST) quickly locates faults, supports remote alarm and fault diagnosis.

III. Technical parameters

Processor: Intel 80486DX 33MHz / 80486DX2 66MHz, 8KB L1 cache;

Memory: 4MB/16MB/32MB DRAM (optional);

Storage: IDE hard disk controller, floppy disk controller, supports 2.5-inch IDE hard drives/SSD;

Graphics: VGA controller, standard VGA display output;

Serial ports: 2×RS-232 (DB9, 115.2kbps);

Parallel ports: 1×EPP/ECP parallel port;

VME bus: compatible with VMEbus IEEE 1014-1994, A16/A24 addresses, D16/D08 data, 7-level interrupts;

Power supply: +5V (powered by VME backplane, low power consumption);

Operating temperature: -40℃～+85℃;

Storage temperature: -55℃～+85℃;

Humidity: 5%～95% (non-condensing, 60℃);

Size: 6U single slot (233mm×160mm);

Weight: approximately 0.55kg;

Certifications: CE, FCC, UL, MIL-STD-810 (reinforced version).

IV. Typical application scenarios

Upgrade of old VME systems: Replace faulty or outdated CPU modules, compatible with existing VME I/O and chassis, low-cost restoration of system operation, prolonging equipment service life;

Industrial automation control: Production lines, process control, DCS system core controllers, managing I/O modules, executing basic control logic and data acquisition;

Extreme environment measurement and control: Embedded main control units for outdoor equipment, oil fields, mines, metallurgy, etc., in high-temperature/low-temperature/high-interference scenarios;

Military and aerospace: Vehicle-mounted, airborne, ship-mounted, etc., mobile harsh environments, and control and communication equipment requiring high reliability and vibration resistance;

Embedded real-time systems: Robots, CNC machines, rail transit, etc., requiring stable real-time response and limited budget control scenarios.

V. Summary of product advantages

The XVME-674 features a classic 80486 processor, ultra-wide temperature range -40℃～+85℃, military-grade reinforcement, VMEbus compatibility, rich onboard I/O, low power consumption and high stability, perfectly adapting to the maintenance of old systems, extreme environments and high-reliability embedded scenarios. The architecture is mature without complex design, strong anti-interference and anti-vibration capabilities, stable long-term operation; PC/AT compatibility reduces development and migration costs, provides rich interfaces without the need for expansion cards, and enables plug-and-play functionality with a single-slot compact design that saves space. It is the ideal choice for legacy VME systems and in demanding industrial environments, offering high性价比 and a long lifecycle for the main control module.