Xycom XVME-428/1
Xycom XVME-428/1 Overview
The Xycom XVME-428/1 is a 6U dual-slot VMEbus intelligent asynchronous serial communication module developed by Xycom (Siel Automation). It is designed to provide multiple high-speed, reliable serial interfaces for industrial automation systems.
Key Features
- Board Form Factor: 6U (dual-slot) VMEbus card compatible with the standard VME-P2 interface
- Processor: Built-in Motorola 68000 series CPU for local protocol processing and interrupt management
- Serial Ports: Offers 8 asynchronous serial channels, supporting RS-232C, RS-422A/RS-485, or TTL signal levels
- High Speed & Reliability: Supports multiple communication modes (asynchronous, character-synchronous, bit-oriented) with programmable gain and programmable interrupt timer
- Industrial Durability: Features thermal management and protective circuitry for stable long-term operation in harsh environments with high temperature and humidity
- Applications: Ideal for PLCs, DCS systems, embedded controllers, fieldbus gateways, and data acquisition/monitoring systems requiring multi-channel serial communication
Typical Specifications
| Item |
Parameter |
| Form Factor |
6U dual-slot VME |
| CPU |
68000 series |
| Number of Serial Ports |
8 asynchronous channels |
| Supported Signal Levels |
RS-232C / RS-422A / RS-485 / TTL |
| Max Sampling Rate |
100 kHz (reference for analog input modules) |
| Programmable Gain |
12 levels |
| Interrupt Timer |
Programmable |
| Operating Temperature |
−40 °C to +85 °C (industrial grade) |
Main Advantages
- Multi-Channel Operation: Provides 8 independent serial ports simultaneously, reducing space and cost compared to multi-card stacking.
- On-Board Processing: The onboard CPU handles protocol conversion locally, reducing host CPU load and improving system response time.
- High Reliability: Designed with industrial-grade protection and cooling for harsh operating conditions.
- Full Compatibility: Fully compliant with the VME standard; can be directly installed in existing VME systems without additional adaptation.
Common Application Examples
- Fieldbus Gateway: Connects RS-232/RS-485 devices to the VME bus for upgrading legacy equipment to digital systems.
- Data Acquisition: Supports synchronized multi-channel serial data collection in high-speed sampling systems.
- PLC/DCS Communication: Provides multiple external interfaces (e.g., instruments, barcode scanners, printers) for PLCs or DCS controllers.
- Embedded Control: Serves as an I/O expansion board for industrial PC/AT-based control platforms.
Summary
The Xycom XVME-428/1 is a high-reliability VME serial communication module designed for industrial automation. With eight asynchronous ports, a built-in 68000 CPU, and industrial-grade protection, it delivers stable, fast, and multi-protocol serial communication in demanding field environments.

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