1. Core Hardware (LC040 without floating point, 16MB)

Processor: MC68LC040, 25 MHz

32-bit, 8KB cache + MMU, no FPU (floating point)

Memory DRAM: 16MB (with parity check)

Battery backup SRAM: 512KB (battery backup for power loss)

Flash Memory: 1MB (162Bug firmware)

Real-time Clock: Battery backup

MVME162-853 (Chinese version)

Brand: Motorola / Emerson / Abaco Systems

Series: MVME162

Type: 6U VME bus single-board computer (SBC)

Position: 16MB DRAM + dual 10Mbps Ethernet + no SCSI + 4×IP slots (no floating point, dual network high configuration)

II. On-board I/O (Key points: Dual Networks, No SCSI, 4 IPs)

✅ Dual 10Mbps Ethernet (DMA)

✅ Dual Serial Ports

Serial Port 1: Console (EIA-232-D)

Serial Port 2: EIA-232 / 422 (optional)

✅ 4 IndustryPack (IP) Expansion Slots (with DMA)

❌ No SCSI Interface

One sentence: The interface configuration is exactly the same as 743, except that the CPU is LC040 (without floating-point).

III. Bus and Mechanical

Bus: VMEbus A32/D64, Master/Slave, Can be used as a system controller

Form: Standard 6U VME Dual High Single Board

Power Supply: +5V, Typical 3.0A

Temperature: 0°C ~ 70°C (Industrial Grade)

IV. Comparison of Key Models in the Same Series (Quickly Differentiate)

MVME162-813: LC040, 8MB, Single Network, No SCSI, 4IP

MVME162-833: LC040, 16MB, Single Network, No SCSI, 4IP

MVME162-853: LC040, 16MB, Dual Networks, No SCSI, 4IP

MVME162-743: 040 (with floating-point), 16MB, Dual Networks, No SCSI, 4IP

One sentence: 853 = 743's "No Floating-point" version; 853 = 833's "Dual Networks" version.

V. Typical Applications

Industrial control, DCS, PLC (No floating-point, requires dual-network redundancy, 16MB memory)

Data acquisition, Network Redundancy System (Dual Network Ports for Redundancy / Isolation)

VME systems require 4 IP expansions, budget-sensitive, no SCSI

Dual Network Ports, No Hard Disk, Pursuing Stability + Redundancy + Large Memory Scenarios

VI. Compatibility and Replacement

Same series can be directly interchanged: 162-223/530/531/532/533A/723/743/763/813/833/853

Key Differences: Whether the CPU has FPU, Memory Size, Number of Network Ports, Presence of SCSI, Number of IP Slots