FANUC A20B-2902-0351 768Kb SRAM Memory board. Normally this memory pcb interfaces between Fanuc NC and MC. This SMD SRAM module runs on later 16B/C and 18B/C control configurations storing the system memory (parameters / options), ladder and programs for the machine. A20B29020351 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.