Xycom XVME-244

The Xycom XVME-244 is a digital input/output (DIO) module based on the VME-bus (6U dual-width) standard. It is specifically designed for industrial automation, process control, and high-speed data acquisition systems. The module features 64 optically isolated channels (32 inputs + 32 outputs), with each channel offering an optical isolation voltage of 300V (channel-to-channel) and 1kV (channel-to-bus), ensuring reliable operation in harsh noise-prone field environments.

1. Key Technical Specifications (Excerpted from Official Manual)

2. Product Features

• High-reliability optical isolation: 300V channel-to-channel and 1kV channel-to-bus isolation prevents high-voltage interference from damaging the host.
• Hot-swappable design: Modular plug-and-play structure allows replacement during system operation, significantly reducing downtime.
• 6U dual-width form factor: Provides ample PCB space for wiring and heat dissipation, compatible with standard VME backplanes.
• Wide operating temperature range (–20 °C ~ +60 °C) meets the extreme temperature requirements of industrial sites.
• Compatibility with multiple VME hosts: Can be directly installed on common VME controllers such as Adept, NI, and GE.

3. Structure and Composition

• Card Body: 6U dual-width PCB integrating optocouplers, TTL/CMOS buffer drivers, power supply filtering, and protection circuits.
• Interface: Standard VME-bus slots (96-pin front, 96-pin rear) for power, address, data, and control signals.
• Channel Partitioning: Every 16 channels form a group, creating four 16-in/16-out sub-units for easy software block management.
• Indicators: Each group is equipped with status LEDs for quick diagnosis of channel operating conditions.

4. Typical Application Fields

5. Installation and Maintenance Guidelines

Installation

• Align the module with the VME-bus slot, gently push it until it clicks into place, then tighten the screws.
• Ensure reliable connection of the power supply (+24V DC) and ground wire to avoid power noise.
• For hot-swapping, first take the corresponding card offline in the system software before physical insertion/removal.

Wiring

• Input/output terminals use screw terminal blocks. Shielded cables are recommended, with proper grounding at the terminals.
• Thanks to optical isolation, signal lines can cross high-voltage areas. However, reasonable wire gauge and routing spacing should still be maintained during wiring.

Debugging

• Use the VME host’s diagnostic software to read the card’s status registers and check if each group of LEDs is functioning normally.
• Perform individual on/off tests for each channel to verify proper operation of the optocouplers.

Maintenance

• When using hot-swapping, first place the card in a safe state (turn off all outputs) at the software level before replacement.
• Regularly check the tightness of the terminal blocks to prevent loosening due to vibration.
• In case of abnormalities (e.g., constant LED illumination, unresponsive inputs/outputs), use a spare card for cross-validation to identify whether the issue lies with the card itself, the backplane, or the power supply.

If you would like to learn more about our products and services, please feel free to contact us at any time!

• Sales Manager : Jinny
• Email : sales5@xrjdcs.com
• Whatsapp/Mobile:+86 15359273791

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