I. Basic Information

Model: MVME162-040

Brand: Motorola (later Emerson)

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

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

Status: EOL， mainstream industrial spare parts model

Core Positioning： 25MHz with FPU， dual network ports， 8MB memory， full-function I/O， balanced performance and reliability

II. Core Hardware Specifications (Differences from 03x: 25 MHz, Dual Network, Full I/O)

1) Processor

MC68040, 25 MHz (Different from 030/031/033's 33 MHz)

With FPU (Floating Point), MMU, 8KB Unified Cache

Performance: Approximately 15–17 MIPS, Supports Floating Point Operations (Lower than 33 MHz Models)

2) Memory (Same as 031/033, Higher than 030)

DRAM: 8 MB (Parity), Maximum 32 MB

SRAM: 512 KB, Battery Backup (Powerful Backup)

Flash: 1 MB (Firmware / Monitoring)

NVRAM/RTC: 8 KB + Real-Time Clock, Battery Backup

3) I/O Interfaces (Dual Network Ports, Full I/O, Same as 031/033)

VMEbus: VME64 A32/D32, Master / Slave, DMA, System Controller

Ethernet: 2×10 Mbps (Dual Network Ports, Redundant / Isolated) - Same as 031/033

Serial Ports: 2×RS-232 (Console + Configurable)

SCSI: Narrow SCSI-2 (Full Function, Same as 03x High-End)

IP Slot: 4×IndustryPack (IP) Expansion Slot

Parallel Port: 8-bit Bidirectional

LED: 8 Status Lights (FAIL, RUN, LAN1, LAN2, SCSI, VME, etc.)

4) Electrical / Environmental (Same as 032, Low Power Consumption)

Power Supply: +5 V @ 4 A (Lower than 33 MHz Models, Low Power Consumption), +12 V @ 0.2 A

Operating Temperature: 0 ℃ ~ +70 ℃ (Fan-Cooled)

Storage Temperature: −40 ℃ ~ +85 ℃

Size: 6U VME (233 × 160 mm)

III. MVME162 03x vs 040 Comparison (Quickly Differentiate)

Table

Model CPU / Frequency FPU DRAM Network Port Power Consumption Position

030 68040 / 33MHz ✅ 4MB 1×10M Medium Early basic model

031 68040 / 33MHz ✅ 8MB 2×10M Medium Early high-end redundant configuration

032 68LC040 / 25MHz ❌ 8MB 1×10M Low Early low-cost

033 68040 / 33MHz ✅ 8MB 2×10M Medium-High Early military full configuration (extremely rare)

040 68040 / 25MHz ✅ 8MB 2×10M Low Later mainstream standard version (with FPU + dual network + low power consumption)

Key Differences: 040 is the "reduced frequency and power consumption, all functions retained" mass production version of 031, with better stability, the largest market stock, and the most affordable price.

Four. Functional Features

With FPU + Low Power Consumption: 25MHz 68040 with floating point, power consumption lower than 33MHz models, suitable for long-term operation

Dual Network Redundancy: Dual 10M Ethernet, supports hot backup / isolation, preferred for high-reliability scenarios

Full I/O Integration: VME, SCSI, dual serial ports, IP slot complete, no need for additional expansion

Complete Power-off Protection: SRAM/NVRAM/RTC battery backup, data security

Industrial-grade Stability: Later mass production version, fewer bugs, stronger compatibility, commonly used in DCS/PLC

Five. Typical Applications

Industrial Automation: With floating point control, dual network redundancy DCS/PLC

Test Measurement: Precise data acquisition, ATE (requires floating point operation)

Railway / Military: Low power consumption, high reliability embedded control

Upgrade of old VME systems: Replace 030/031/032, balance performance and stability

Six. Replacement and Purchase

Direct Replacement: MVME162-040 (large market volume, low price, most stable)

Upgrade Replacement: MVME2700, MVME3100 (PowerPC, PCI, Gigabit network)

Note on Spare Parts: 040 is the most easily purchasable and cost-effective model in the MVME162 series