MVME162-431 (400 Series, 430's SCSI-less simplified version, original factory正品)

Conclusion： MVME162-431 is the official model of Motorola/Emerson 400 Series, a version of 430 without SCSI interface， retaining 8MB DRAM + 4×IP slots + Ethernet， targeting high I/O and no SCSI requirement scenarios.

1. Original factory standard configuration (431 official parameters)

CPU: MC68LC040 @ 25 MHz (no FPU)

Form： 6U dual high VME SBC

DRAM： 8 MB (parity)

SRAM： 512 KB (battery backup)

Flash： 1 MB

I/O：

10Base-T Ethernet (10 Mbps， with DMA)

No SCSI interface (430 has)

2×RS-232 serial ports

4×IndustryPack (IP) slots (with DMA)

Position： 400 Series high I/O， no SCSI model

II. 431 vs 430 vs 413 (Core Differences: Presence of SCSI + Memory) Table

Model CPU DRAM SCSI Ethernet IP Slot Position

413 LC040@25 4MB ✅ ✅ 4 Standard I/O Type

430 LC040@25 8MB ✅ ✅ 4 High-End I/O Type (Full Interface)

431 LC040@25 8MB ❌ ✅ 4 High-End I/O Type (No SCSI)

Common points: Dual high-speed, no FPU, 4 IP slots, with Ethernet

431 Key differences: Remove SCSI, retain 8MB memory + full IP expansion, suitable for systems without SCSI storage

III. Complete model overview of 400 series (413/430/431/432/433)

413: 4MB, SCSI + Ethernet, 4IP

430: 8MB, SCSI + Ethernet, 4IP

431: 8MB, no SCSI, Ethernet, 4IP

432: 8MB, SCSI + Ethernet, 2IP (Single High)

433: 8MB, no SCSI, Ethernet, 2IP (Single High)

IV. Purchase and replacement suggestions

Replace 430: Direct replacement, lacking only SCSI, memory and I/O capabilities are the same

Replace 413: Double the memory (4→8MB), no SCSI, stronger I/O expansion

Applicable scenarios: Multi-IP expansion, large program / data caching, VME systems without SCSI storage