Motorola MVME‑147A VMEbus Single Board Computer

The Motorola MVME‑147A is a legacy VMEbus single‑board‑computer (SBC) powered by MC68030 32‑bit microprocessor, widely deployed in industrial real‑time control and data‑acquisition VME rack systems. It can act as VME master/slave and system controller, executing real‑time application software and handling local I/O and back‑plane bus communication for mission‑critical automation equipment.

This VME form‑factor CPU board integrates DRAM, battery‑backed SRAM, multi‑channel serial ports, watchdog timer and optional Ethernet / SCSI interfaces. It supports MC68882 floating‑point coprocessor for complex math computation. Widely used as aftermarket spare‑part for legacy industrial‑control cabinet overhaul, system debugging and retrofitting projects.

Main Specifications

• Brand: Motorola; Model:MVME‑147A; Type:VMEbus Single Board Computer
• Processor:MC68030 CPU, optional MC68882 floating‑point coprocessor; clock speed 16/25/33.33 MHz
• Memory:On‑board DRAM up to 32 MB; battery‑backed SRAM; multiple ROM/EPROM sockets for firmware
• Interface:VMEbus A32/D32 master/slave; multiple RS‑232 serial ports; optional Ethernet and SCSI; Centronics printer port
• Function:Real‑time program execution, VME system‑controller function, interrupt handling, watchdog supervision, local data storage and communication
• Feature:Standard VME 6U rack‑mount, hardware watchdog timer, multi‑level VME interrupt support, industrial‑grade PCB layout
• Operating Environment:0℃ ~ +65℃, 5%‑95% RH non‑condensing
• Certifications: CE compliant for legacy VME‑bus industrial‑automation applications

Core Functions

• Run real‑time operating‑system and user application firmware as main controller inside VME‑bus chassis.
• Operate as VMEbus master/slave and system‑controller to manage back‑plane bus arbitration and multi‑level interrupt processing.
• Battery‑backed SRAM preserves critical configuration and runtime data during power‑loss events.
• Multi‑serial‑port design supports connection to field sensors, HMI and other serial‑protocol industrial devices.
• Built‑in watchdog timer triggers system reset upon CPU software‑hang for improving system reliability of unattended equipment.
• Optional Ethernet and SCSI interfaces expand network‑connectivity and mass‑storage capability for data‑logging applications.

Application Scenarios

• Main CPU processing component for legacy Motorola VME‑bus industrial real‑time control systems.
• Critical spare‑part for power‑plant, test‑rig, semiconductor‑equipment and military‑industry VME‑chassis maintenance.
• Retrofit and spare replacement for legacy MVME‑147A single‑board‑computer VME‑system upgrade projects.
• VME rack overhaul, bus‑communication debugging and faulty VME‑CPU‑board replacement tasks.
• Spare‑parts inventory for legacy‑system integrators and industrial‑equipment‑maintenance contractors.

• Global aftermarket spare supply for technical teams maintaining Motorola MVME series VME‑bus automation hardware.