Product Details

The XYCOM XVME-977, PN 74977-001, is a discontinued 6U double-height VMEbus mass storage module, specially developed for XYCOM XVME-65x series PC/AT compatible VME single board computers, including XVME-653, XVME-654, XVME-655 and XVME-690. It cannot operate independently, it needs to connect IDE and floppy signals from the host SBC via the P2 backplane connector or dedicated J2 cable, and the storage unit can be placed in any empty VME slot in the chassis, bringing flexible cabinet layout.

This module integrates a 2.5-inch IDE hard disk bay and a standard 3.5-inch 1.44MB floppy disk drive. The hard disk supports multiple capacity options, and solid state IDE flash disk can be substituted for high vibration scenarios to avoid mechanical failure. It adopts PC/AT compatible IDE and floppy controller, which can be directly identified by DOS, Windows and classic real-time operating systems without extra driver. The module supports automatic error retry and transparent bad sector remapping, automatically reassigning defective sectors without reformatting, improving data reliability in long-term industrial operation. The internal power circuit gets power from VME P1/P2 connector, with built-in power filtering and surge suppression components to reduce backplane noise interference.

Users need to confirm host CPU revision, P2 pin definition and IDE master-slave jumper before installation to avoid storage resource conflict. The front panel reserves floppy access window and activity LED indicators, which display power status and disk read-write activity for quick fault check during commissioning and routine maintenance. The mechanical structure adopts industrial vibration-resistant reinforcement, suitable for continuous operation in power plant monitoring, chemical control systems, aerospace test benches and automated test equipment. This legacy storage module is mainly supplied as spare replacement parts for existing XYCOM VME automation racks. Users need to inspect disk health and verify BIOS compatibility before deployment. A conformal coated version is optional for high humidity, dusty and corrosive industrial sites. This model is widely used in old VME control system renovation projects for system boot, control program storage and historical field data recording.

This hard disk floppy disk mass storage module adopts standard 6U double-height VME rack mount structure. It draws power from the VME backplane. LED indicators display power status and disk activity for convenient on-site inspection. The operating temperature range is 0°C to 65°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 disk jumper configuration backup for fast recovery after hardware replacement.

This XYCOM XVME-977 storage module is widely applied in legacy VME control racks and industrial automation upgrade projects. It provides integrated IDE hard disk and floppy mass storage for matched XVME-65x VME SBC. As a reliable discontinued spare part, the XYCOM XVME-977 retains original IDE and floppy signal timing compatibility, and effectively reduces the renovation cost of legacy industrial control system maintenance.