1. General Description

• 020A = 4×IP slots, no Ethernet/SCSI, industrial high‑rel revision

• Difference from 020: improved reset circuit, enhanced noise immunity, industrial temperature screening, more robust VME arbitration timing, and tighter component grading

• Position: ruggedized, high‑reliability version of 020 for harsh environments

2. Core Specifications

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

  Optional: MC68040 @ 25 MHz (with FPU)

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

• Battery‑Backed SRAM: 512 KB

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

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

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

3. Onboard Interfaces

• IndustryPack (IP): 4 × single‑height IP slots (or 2 × double‑height)

  • Supports wide range of I/O: AI/AO/DI/DO, serial, CAN, Profibus, etc.

• 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

• Not included: Ethernet, SCSI (020A = IP‑only I/O)

4. Mechanical & Environmental

• Form Factor: 6U VMEbus, single slot

• Operating Temperature: 0°C ~ +55°C (industrial grade, screened)

• Storage Temperature: ‑40°C ~ +85°C

• Humidity: 5%–95% non‑condensing

• Ruggedization: Enhanced ESD/noise immunity, tighter component tolerance, improved power supply filtering (vs. 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 & configuration, 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 (ruggedized 020)

7. Typical Applications

• VMEbus systems requiring massive custom I/O (up to 4 IP modules) in harsh environments

• Industrial automation & DCS with distributed analog/digital I/O and fieldbus

• Real‑time control systems needing high I/O density without Ethernet/SCSI

• Rugged/industrial upgrades from 020 to 020A for better reliability

8. Maintenance Notes

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

• Configure VMEbus master/slave and IP slot addressing via onboard jumpers

• Verify IP module IDs and compatibility before power‑on

• For 020→020A upgrades: no wiring changes; direct plug‑and‑play replacement