Product Details

The XYCOM XVME-428/2 is a discontinued 6U VMEbus intelligent asynchronous serial communication module, also known as IASCM, designed for XYCOM legacy VME control racks and industrial serial data acquisition systems. Different from the XVME-428/1 variant with RS422/RS485, this version is equipped with 8 independent RS-232C serial channels, controlled by an onboard Motorola 68000 intelligent processor and dedicated firmware. The local processor independently handles serial data buffering, framing, parity checking, error handling and protocol management, which greatly offloads the serial processing burden of the VME host CPU and ensures stable data transmission even when the main controller is busy with other control tasks. Each channel supports programmable baud rate ranging from 50 baud to 19.2k baud, and users can configure data bits, stop bits and parity options to match different RS232 field devices. It supports both character I/O and record I/O transmission modes, and adopts XYCOM interprocessor communication protocol for reliable data exchange between the VME backplane and serial peripherals. This module acts as a communication bridge between the VME master CPU and serial instruments, barcode readers, operator terminals, serial printers and sensors, transmitting real-time process data and control commands. It operates as a standard VME slave device, supporting configurable VME interrupts to notify the host processor of data reception, transmission completion or communication faults. The RS232 signal circuit is integrated with surge suppression and ESD protection components to resist transient voltage spikes and electrostatic interference, improving communication stability in factory environments with inverters and servo drives. Users can configure base address, interrupt vector and channel 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 per-channel communication status, helping maintenance technicians quickly locate wiring faults, signal loss 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 RS232 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 RS232 cable wiring definition before installation. A conformal coated version is optional for high humidity, dusty and corrosive industrial sites. This model is widely used in test equipment serial connection, local operator panel communication, instrument data logging and old VME RS232 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-428/2 intelligent serial module is widely applied in legacy VME control racks and industrial automation upgrade projects. It provides autonomous multi-channel RS232 serial communication and intelligent data processing for the VME master control system. As a reliable discontinued spare part, the XYCOM XVME-428/2 retains original VME bus timing and serial protocol compatibility, and effectively reduces the renovation cost of legacy industrial control system maintenance.