This is a PCB (printed circuit board) module that serves as a memory card for FANUC controllers. It is identified as a FROM/SRAM memory board with 64MB/1MB capacity, used for storing system parameters and operational data.
Based on current listings:
| Specification | Detail |
|---|---|
| Part Number | A20B-3900-0303 |
| Part Type | Memory Card / System Card |
| Compatibility | FANUC CNC Systems, e.g., Series 18i |
| Key Function | Data storage & processing for machine parameters and programs |
| Origin | Japan |
It is a critical component designed for seamless integration and high-speed data processing within FANUC control units.