Product Details

The XYCOM XVME-428/1 is a discontinued 6U VMEbus intelligent asynchronous serial communication module, also known as IASCM, designed for XYCOM legacy VME control racks and industrial distributed serial communication systems. It is built with an onboard 68000-based intelligent I/O kernel and preloaded firmware, which handles serial data framing, buffering, error checking and protocol management independently, offloading heavy serial processing tasks from the VME host CPU. This module provides 8 independent configurable serial channels, the XVME-428/1 variant supports RS-422 and RS-485 differential signaling for long-distance multi-drop wiring. Each channel supports programmable baud rate ranging from 50 baud to 19.2k baud, with adjustable data bits, stop bits and parity settings to match different serial peripheral requirements. It supports both character I/O and record I/O modes, and works with XYCOM interprocessor communication protocol for reliable data exchange between the VME backplane and field devices. As a VME slave device, it supports standard VMEbus cycles and configurable interrupts to alert the host when data reception, transmission or communication faults occur. Differential RS422/RS485 signals deliver strong common-mode noise rejection, which greatly improves stability in factory environments with inverters, servo drives and contactors. On-board surge suppression and ESD protection circuits safeguard the transceivers against voltage spikes and electrostatic discharge on field cables. Users can configure base address, interrupt vector and channel operating parameters through on-board jumpers and DIP switches to avoid address and interrupt conflicts with other VME modules installed in the same chassis. The front panel is equipped with LED indicators for power status, bus activity and channel communication status, helping maintenance technicians quickly locate wiring faults, signal attenuation and communication timeout issues during commissioning and routine inspection. The PCB adopts industrial-grade electronic components and reliable EMC protection design, capable of resisting vibration, dust and temperature fluctuation in machining workshops, power stations and chemical process plants. This legacy intelligent serial controller module is mainly supplied as spare replacement parts for existing XYCOM VME automation systems. Users need to confirm VME chassis compatibility, bus address allocation and serial bus termination settings before installation. A conformal coated version is optional for high humidity, dusty and corrosive industrial sites. This model is widely used in process monitoring equipment, remote operator panel connection, multi-drop instrument networking and old VME serial control system retrofit projects.

This intelligent asynchronous serial module adopts standard 6U VME rack mount structure. It draws power from the VME backplane. LED indicators display power status, bus activity and channel communication status for convenient on-site inspection. The operating temperature range is 0°C to 50°C, storage temperature ranges from -40°C to 85°C, relative humidity 5% to 95% non-condensing. It complies with industrial shock, vibration and EMC standards and has CE certifications. It supports baud rate, interrupt and address configuration backup for fast recovery after hardware replacement.

This XYCOM XVME-428/1 intelligent serial module is widely applied in legacy VME control racks and industrial automation upgrade projects. It provides autonomous multi-channel differential serial communication and intelligent data processing for the VME master control system. As a reliable discontinued spare part, the XYCOM XVME-428/1 retains original VME bus timing and serial protocol compatibility, and effectively reduces the renovation cost of legacy industrial control system maintenance.