The Emerson/Motorola MVME147SA-2 is a VMEbus single-board computer engineered for industrial automation, process control, and telecommunications infrastructure. This 32-bit module delivers compute performance in harsh environments spanning −40°C to +85°C, combining an MC68030 processor with integrated floating-point acceleration, configurable DRAM up to 32 MB, and multi-protocol I/O including SCSI, Ethernet, and serial communications.
## Technical Specifications
**Processor & Memory**
• MC68030 microprocessor at 16, 25, or 33.33 MHz with on-chip cache and Memory Management Unit (MMU)
• MC68882 Floating-Point Coprocessor synchronized to processor frequency
• DRAM: 4 MB to 32 MB configurable, selectable parity options
• Static RAM: 2 KB with battery backup
• EPROM: Four 32-pin sockets supporting up to 1 M × 8 devices
**VMEbus Interface**
• A32/D32 and A24/D16 master interface
• System Controller capable
• ANSI/VITA 1-1994 VME64 (IEEE STD 1014) compliant
**I/O & Communications**
• Four EIA-232-D serial ports via 8530 controller
• Narrow SE SCSI via WD33C93B with DMA
• 10 Mb Ethernet (AMD AM7990 Lance MAC with Intel LXT901 SIA)
• 8-bit bidirectional parallel interface (Centronics printer port compatible)
**Timekeeping & Diagnostics**
• Time-of-Day Clock/Calendar with battery backup (MK48T02 NVRAM)
• Two 16-bit timers and watchdog timer
• On-board command-driven debugger and diagnostic package
## Physical & Environmental
• Dimensions: 233.4 mm H × 160.0 mm D × 19.8 mm W (9.187″ × 6.299″ × 0.8″)
• Front panel: 261.8 mm (10.3″)
• Weight: ~1 kg
• Operating temperature: −40°C to +85°C
• PWB flammability rating: UL 94V-0
## Key Features
• P1/P2 backplane design for 32-bit VMEbus systems
• Battery-backed time-of-day and static RAM
• MVME712M transition module support for serial port adaptation
• Backward compatible with existing VMEbus installations
## Compatibility & Integration
The MVME147SA-2 integrates into VMEbus platforms alongside related models (MVME147S, MVME147S-1, MVME147SA-1, MVME147SB-1, MVME147SC-1, MVME147SRF). Header J2 configuration is debugger-dependent per 147Bug specifications.
