Fanuc A20B-2900-0530 256KB ram Memory board. Normally this simm memory pcb fits on the 16 or 18 CPU MAIN boards.
Running the 16 control config in which it stores the system setting and programs. A20B29000530 simm RAM 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!