1. Part Number Meaning

• A16B: FANUC standard prefix for Series 16 PCBs

• 1212: Base board series number

• Full format: A16B‑1212‑XXXX (the last four digits define the specific model)

2. Common Types & Functions

✅ Power Supply Units (PSU)

• Models: A16B‑1212‑0100 / 0850 / 0871 / 0950 / 0471

• Function: Accepts AC 200–240V input; outputs +5V, ±15V, +24V for CNC mainboard, I/O, display, and peripherals.

• Key feature: Built‑in AC input switching; no separate relay unit required.

✅ I/O Boards (Input/Output)

• Models: A16B‑1212‑0220 / 0221 / 0300

• Function: Digital I/O interface between CNC and machine (limit switches, relays, panels, sensors).

• Typical: 32‑in / 32‑out channels, 24V DC logic.

✅ Memory / Main Boards

• Models: A16B‑1212‑0210 / 0216

• Function: Stores CNC parameters, ladder logic, part programs; serves as the main control board for early 0‑Series (0C/0D) systems.

✅ Other Specialized Boards

• A16B‑1212‑0931: Emergency stop control board (robot R‑J2)

• A16B‑1212‑0420: Laser interface PCB (Series 15)

3. Compatible Systems

• FANUC 0‑Series (0C / 0D / 0i)

• FANUC 16 / 18 / 21‑Series

• FANUC R‑J2 Robot Controllers

• Older 10 / 11 / 12 / 15‑Series CNC

4. Market Status

• Most variants are obsolete / discontinued.

• Supply: Used, refurbished, or surplus units dominate the market.

• Price range (approx.):

  • Power supplies: $300 – $2,000 USD

  • I/O boards: $400 – $1,000 USD

• Warranty: Typically 6–24 months from specialty CNC suppliers.

5. Specifications (General)

• Operating temp: 0 °C to +45 °C (non‑condensing)

• Storage temp: −20 °C to +60 °C

• Humidity: ≤ 85% RH (no condensation)

• Altitude: Up to 1,000 m without derating