XYCOM XVME-957

 The XVME‑957 is an industrial-grade VME‑bus storage/control module launched by XYCOM, a company founded in 1974 and headquartered in California, USA. It adopts the VME bus architecture and is designed for harsh environments such as industrial automation, robotics, data acquisition, and image processing. It features high performance, high reliability, and excellent expandability.

Main Technical Specifications

• Operating Voltage: 220 V AC ±10% (some models are marked as 220 V)
• Processor: 32-bit RISC processor, supporting the IEC 61131‑3 standard
• Memory: 128 MB DDR3 (optional)
• Storage: Built-in IDE hard drive (capacity depends on specific configuration) + 1.44 MB 3.5-inch floppy disk drive
• Interfaces: Dual-channel CAN bus, VME‑bus, optional Ethernet/USB expansion ports
• Operating Temperature Range: ‑40 ℃ ~ +85 ℃, with MTBF (Mean Time Between Failures) exceeding 100,000 hours
• Certification: Compliant with the IEC 61131‑3 industrial standard

Product Features

• High Reliability: Utilizes industrial-grade components, has a wide operating temperature range, and adopts a long-life design (MTBF > 100,000 hours).
• High Expandability: Features a VME‑bus multi-slot design, supporting flexible plug-and-play of various I/O, communication, and storage modules.
• Powerful Storage Capacity: Integrates a large-capacity IDE hard drive and a floppy disk drive, compatible with operating systems such as Windows NT, QNX, and VxWorks.
• Multi-Protocol Support: Built-in dual-channel CAN, ensuring good bus compatibility and facilitating integration with systems like PLCs (Programmable Logic Controllers), DCSs (Distributed Control Systems), and robots.
• Easy Programming: Compliant with the IEC 61131‑3 standard, supporting common industrial programming languages such as ladder diagram and structured text.

Structure and Composition

• Chassis: Dual-height VME‑bus slot enclosure, adopting a metal heat dissipation structure.
• Motherboard: Equipped with a 32-bit RISC processor, DDR3 memory slots, and a VME‑bus interface.
• Storage Subsystem: IDE hard disk drive + 1.44 MB floppy disk drive (occupying a single dual-height slot).
• Communication Module: CAN bus transceiver, optional Ethernet/USB interface card.
• Power Module: Accepts 220 V AC input and provides internally regulated power supply to each subsystem.

Typical Application Fields

• Industrial automation control systems (PLCs, DCSs)
• Robot control and motion control platforms
• Large-capacity data acquisition and on-site data storage
• Real-time image processing and machine vision systems
• On-site control environments requiring high reliability, such as petrochemical, power monitoring, and rail transit industries

Installation and Maintenance Points

Pre-Installation Inspection

1. Ensure the chassis is securely fixed to prevent vibration.
2. Check that the power lines and grounding comply with the 220 V AC ±10% standard.
3. Confirm that the VME‑bus backplane corresponds correctly to the slots of other modules.

Module Plugging and Unplugging

1. Wear anti-static gloves to avoid electrostatic damage to the chips.
2. Align the buckles when inserting, and press gently until it is in place; when pulling out, first cut off the power and pull the buckles gently.

Wiring and Grounding

1. Use shielded twisted-pair cables for communication cables such as CAN and Ethernet to maintain good grounding.
2. High-speed signal lines should be as short as possible to avoid crossing with high-current lines.

Initial Commissioning

1. After power-on, check the indicator lights to confirm the status of the power supply, bus, and storage.
2. Use VME‑bus diagnostic software to read the module ID and firmware version, ensuring compatibility with the system.

Daily Maintenance

1. Regularly check the heat sinks and fans (if equipped) to maintain ventilation.
2. Conduct a health check (SMART check) on the storage media every 6 months.
3. Monitor the CAN bus error count and replace faulty communication cards in a timely manner.

Troubleshooting

• Power Abnormality: Check the input voltage, fuses, and internal voltage stabilization modules.
• Bus Communication Failure: Confirm that there is no oxidation on the VME‑bus slots and the golden fingers of the card slots; re-plug the module if necessary.
• Storage Read/Write Errors: Replace the hard disk or floppy disk drive, and check the IDE interface connections.

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