I. Core Parameters

CPU: MC68040, 32 MHz, 32-bit, with FPU/MMU/8KB Cache

DRAM: 8MB FPM (parity check)

SRAM: 512KB battery backup (power-on data retention)

Flash: 1MB

Bus: VMEbus A32/D64, master/slave, system controller

Board-mounted I/O (critical)

❌ No onboard Ethernet (requires IP or subcard expansion)

❌ No onboard SCSI (requires IP or subcard expansion)

2 × Serial ports: Console (EIA-232-D), EIA-232/422 optional

✅ 4 × IndustryPack (IP) expansion slots (with DMA)

Environment: Industrial grade 0–70°C, shock-resistant, +5V power supply, standard 6U VME

II. 530A vs 522A vs 523A (The three most confusing models)

MVME162-522A: 8MB DRAM; Network port / SCSI are both optional (sub-card); Basic style

MVME162-530A: 8MB DRAM; No onboard network port / SCSI; 4 x IP slots (standard); Extended base model

MVME162-523A: 8MB DRAM; Onboard network port + SCSI (standard); Fully integrated model

In one sentence: 530A = 522A + 4 x IP slots; 523A = 530A + Onboard network port + SCSI.

III. Main features

High scalability: 4 IP slots (with DMA), can flexibly add analog, digital, and communication modules

High reliability: Industrial wide temperature range, shock-resistant, supports VxWorks, pSOS real-time systems

No integrated peripherals: No onboard network port / SCSI, suitable for scenarios without network / storage and requiring extensive expansion

Good real-time performance: MC68040 + VMEbus, suitable for hard real-time control

IV. Typical applications

Industrial DCS/PLC, process control

Embedded real-time control, robots

Military / aviation, communication, test and measurement

Scenarios requiring multiple IP expansions, without onboard network / storage

V. Spare parts and alternatives

Model: MVME162-530A

Direct replacement: MVME162-522A (basic), MVME162-523A (fully integrated)

Downward compatibility: Can directly replace 522A (IP slot compatibility)