Fanuc A20B-2902-0411 FROM / SRAM Memory board. Normally this memory pcb interfaces between Fanuc NC and MC. Running the 16C control config with 6MB FROM & 256KB SRAM in which it stores the system memory, ladder, and programs.
A20B29020411 ROM memory pcb is available today, either as exchange or on an outright basis stock dependent with full testing and repair services are available also. Warranty is 180 days on repair or exchange!