1. General Description

• 021A = 4×IP slots + SCSI‑2, no Ethernet, industrial high‑rel

• Difference from 020A: adds integrated SCSI‑2 (fast/narrow, 10 MB/s) with DMA; otherwise same ruggedized platform

• Position: ruggedized, high‑I/O + local storage SBC for systems needing both IP expansion and disk/tape support

2. Core Specifications

• Processor: Motorola MC68LC040 @ 25 MHz (8 KB cache, MMU, no FPU)

  Optional: MC68040 @ 25 MHz (with FPU)

• DRAM: 4 MB parity‑checked DRAM (expandable to 8 MB)

• Battery‑Backed SRAM: 512 KB

• Flash Memory: 1 MB Flash (162BUG firmware)

• NVRAM/RTC: 8 KB NVRAM + RTC (TOD), battery‑backed

• VMEbus: A32/D32/D64, master/slave, system controller capable

• SCSI: Onboard SCSI‑2 (fast/narrow, 10 MB/s) with 32‑bit DMA

3. Onboard Interfaces

• IndustryPack (IP): 4 × single‑height IP slots (or 2 × double‑height), each with DMA

  • Supports AI/AO/DI/DO, serial, CAN, Profibus, etc.

• SCSI: SCSI‑2 (50‑pin, fast/narrow) with DMA (no Ethernet)

• Serial Ports:

  • 1 × Console: EIA‑232‑D (DCE)

  • 1 × Configurable: EIA‑232‑D / EIA‑530 (DCE/DTE)

• Timers: Six tick timers + watchdog timer

• Front Panel:

  • 8 LEDs: FAIL, STAT, RUN, SCON, LAN, FUSE, SCSI, VME

  • 2 pushbuttons: RESET, ABORT

4. Mechanical & Environmental

• Form Factor: 6U VMEbus, single slot

• Operating Temperature: 0°C ~ +55°C (industrial screened, high‑rel)

• Storage Temperature: ‑40°C ~ +85°C

• Humidity: 5%–95% non‑condensing

• Ruggedization: Enhanced ESD/noise immunity, tighter component grading, improved power filtering (vs. standard 020)

5. Firmware & Software Support

• Boot Monitor: 162BUG (Motorola proprietary)

• Supported OS: VxWorks, LynxOS, OS‑9, pSOS+, VRTX, OpenBSD/mvme68k, NetBSD/mvme68k

• Functions: POST, memory/VME mapping, serial console, IP slot mapping, SCSI initialization, watchdog control

6. MVME162 Series Comparison (Key Models)

• 010A: 2×IP, no SCSI/Ethernet

• 011A: SCSI‑2, no Ethernet/IP

• 012/012A: Ethernet + 2×IP, no SCSI

• 013/013A: SCSI‑2 + Ethernet, no IP

• 014A: Ethernet + 2×IP, no SCSI, industrial high‑rel

• 020: 4×IP, no Ethernet/SCSI (standard)

• 020A: 4×IP, no Ethernet/SCSI, industrial high‑rel

• 021A: 4×IP + SCSI‑2, no Ethernet, industrial high‑rel (this model)

7. Typical Applications

• Industrial VME systems needing 4×IP I/O + local SCSI storage (disk/tape)

• Rugged automation/DCS with distributed I/O and on‑board data logging

• Real‑time control requiring high I/O density without Ethernet

• Upgrades from 020/020A to add SCSI while keeping 4×IP slots

8. Maintenance Notes

• Replace backup battery every 3–5 years to preserve SRAM/RTC/NVRAM

• Configure VME master/slave, IP addressing, and SCSI ID via jumpers

• Verify IP module IDs and SCSI termination before power‑on