Fanuc, Motherboard/PCB/Fanuc Card
A20B-3900-0233 SRAM MODULE
- Part Number: A20B-3900-0233
- Memory Capacity: 32MB FROM + 512KB SRAM
- Compatibility: FANUC 16i/18i/21i Model B Controller series
- Function: Battery-backed storage for parameters, programs, and system data
- Installation: Plug-in module (DIMM style)
- Maintenance Note: Requires immediate reloading of system files, parameters, and programs after installation






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