I. Basic Information

Model: MVME162-041

Brand: Motorola / Emerson

Form: 6U VME64 single-board computer (SBC)

CPU: MC68040 @ 25 MHz (with FPU, MMU, 8KB Cache)

Status: EOL， industrial spare parts circulation

Core Differences： Single network port (1×10M)， others the same as 040 (with FPU， 8MB， full I/O)

II. Core Hardware Specifications (compared with 040: the only difference is the single network interface)

1) Processor (same as 040)

MC68040, 25 MHz

✅ With FPU (floating point), MMU, 8KB unified cache

Performance: approximately 15–17 MIPS

2) Memory (fully the same as 040)

DRAM: 8 MB (parity), maximum 32 MB

SRAM: 512 KB, battery backup

Flash: 1 MB

NVRAM/RTC: 8 KB + real-time clock, battery backup

3) I/O Interfaces (single network interface, the rest the same as 040)

VMEbus: VME64 A32/D32, master/slave, DMA, system controller

Ethernet: 1×10 Mbps (single network interface, different from 040's dual interface)

Serial Port: 2×RS-232 (Console + configurable)

SCSI: Narrow SCSI-2 (full functionality)

IP Slot: 4×IndustryPack (IP) expansion slots

Parallel Port: 8-bit bidirectional

4) Electrical / Environmental (same as 040)

Power Supply: +5 V @ 4 A (low power consumption)

Operating Temperature: 0 ℃ ~ +70 ℃

Size: 6U VME (233 × 160 mm)

III. MVME162-040 vs 041 (easy differentiation at a glance) Table

Model CPU / Frequency FPU DRAM Network Port Power Consumption Position

040 68040 / 25MHz ✅ 8MB 2×10M Low Standard mainstream version (dual network redundancy)

041 68040 / 25MHz ✅ 8MB 1×10M Low Simplified cost version (single network)

One sentence: 041 = 040 with one network port removed, otherwise identical.

Four. Functional Features

With FPU + low power consumption: 25MHz 68040 with floating point, stable long-term operation

Single network port design: Sufficient for non-redundant scenarios, lower cost

Full I/O retention: VME, SCSI, dual serial ports, IP slot are all complete

Complete power-off protection: SRAM/NVRAM/RTC battery backup

Five. Typical Applications

Industrial automation: DCS/PLC without dual network redundancy required

Test measurement: Single network port, devices requiring floating point operations

Replacement of old VME systems: Budget limited, no redundant network required

Six. Alternatives and Purchasing

Direct replacement: MVME162-040 (dual network, more versatile, price close)

Upgrade replacement: MVME2700, MVME3100 (PowerPC, gigabit network)

Note on spare parts: 041 is 10%-20% cheaper than 040, but less available in the market.