I. Basic Positioning MVME167‑002B is a 6U VME single-height industrial single-board computer (SBC) from Motorola/Emerson. It is the B revision (upgraded version) of 002A, fully compatible with 002A/001A/003A/004A. It mainly enhances the default memory capacity, hardware reliability, ESD protection and anti-interference capabilities, and is used for industrial control scenarios with medium to high load, multi-tasking and high stability requirements. II. Core Processor and Memory Processor: MC68040RC25, 25MHz, 32-bit, with built-in hardware FPU, 8KB L1 cache, MMU (same as 002A). DRAM: Default 32MB 32-bit parity (002A defaults to 8MB), maximum expandable to 32MB (standard configuration is full configuration). SRAM: 128KB, battery backup (power off retention), same as 002A. Flash/ROM: 4×44-pin PLCC, 2×32-bit storage units, firmware固化. NVRAM/RTC： Integrated 8K×8 NVRAM + real-time clock， battery backup. III. Board-Built Interfaces (Same as 002A， completely consistent) Ethernet： Single 10Mbps 10BASE-T/AUI， DMA. Serial Port： 4×EIA‑232‑D (1 control + 3 user)， maximum 115200bps. SCSI‑2： Single-ended， DMA， 20MB/s， 7 peripherals (ID0-6). Parallel Port： 1×IEEE 1284 bidirectional. VME Bus： A32/D32， master / slave / system controller. Expansion： PMC expansion slot (optional). Timer / Watchdog： 6×32-bit programmable timer + hardware WDT. IV. Electrical and Environmental (B Version Optimization) Power Supply： +5V DC ±5%， typical 3.5A， maximum 4.5A (same as 002A). Operating Temperature： 0℃～+55℃ (standard type). Storage Temperature： -55℃～+125℃. Cooling： Forced air cooling， approximately 100CFM. Reliability： B version enhanced PCB routing， ESD protection， anti-interference， long-term stability superior to 002A. V. Structure and Compatibility Size： 6U VME (233.4×160mm)， single height. Weight： Approximately 0.7kg. Compatibility： Fully compatible with 001A/002A/003A/004A pins， direct replacement. VI. Key Differences between 002A and 002B (3 points) Memory： 002A = 8MB (maximum 32MB)； 002B = 32MB (standard full configuration). Reliability： 002B ESD / anti-interference / PCB optimization， more stable. Firmware： 002B pre-installed updated version 167Bug， better compatibility. VII. Typical Applications Industrial automation， data acquisition， motion control， embedded systems， standard VME control scenarios requiring 32MB of memory + high stability.