I. Core Parameters (Easy to Understand)

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

DRAM: 16MB FPM (parity check) (530/531/523/532 all 8MB)

SRAM: 512KB battery backup (powerful for power loss protection)

Flash: 1MB

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

Built-in I/O (Critical)

✅ 10 Mbps Ethernet (with DMA)

✅ Narrowband SCSI (with DMA)

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. 533A vs 532A vs 531A vs 530A (Ultimate Comparison)

530A: 8MB; ❌ Network port ❌ SCSI ✅ 4×IP (Basic)

531A: 8MB; ✅ Network port ❌ SCSI ✅ 4×IP (Network)

532A: 8MB; ✅ Network port ✅ SCSI ✅ 4×IP (Fully integrated 8MB)

533A: 16MB; ✅ Network port ✅ SCSI ✅ 4×IP (Fully integrated 16MB top-of-the-line)

Sentence: 533A = 532A + 16MB of high memory, the interfaces are exactly the same, and the memory doubles.

III. Main Features

16MB of high memory: Compared to the 8MB models in the same series, it can run larger systems, more tasks, and handle larger data.

Full interface integration: Network port + SCSI + dual serial ports + 4IP slots, no need for subcards to set up / store / expand

Strong expansion capability: 4 IP slots (with DMA), can plug analog, digital, communication, motion control modules

High-reliability industrial design: wide temperature range, shock resistance, battery backup SRAM/TOD clock, supports VxWorks/pSOS

IV. Typical Applications

Industrial DCS/PLC, process control (requires large memory + network + local storage + multiple I/O)

Embedded real-time control, robots, military / aviation, communication base stations

Test measurement, data acquisition system (SCSI connects hard drives / optical drives, IP connects sensors)

High-end VME system requiring complete interfaces + maximum memory + maximum expansion

V. Spare Parts and Alternatives

Model: MVME162-533A (Spare part number: 01-W3960Bxxx)

Direct replacement:

Downward: 532A (8MB), 531A (no SCSI), 530A (no network or SCSI)

Compatible replacement: Can directly replace all models in the same series (VME/IP slot compatibility)