Fanuc Memory board type DRAM Module reference
FANUC A20B-3900-0042 for sale. DRAM Module 4M for
Fanuc
16i, 18i, 20i and
Fanuc 21i model. Fanuc DIMM memory module
capacity of 4MB ready to install on your CNC Fanuc i
series master board.. This Fanuc i series DIMM Module A20B-3900-0042
comes with a warranty.
CAUTION:
Before
starting the replacement of your PCB A20B-3900-0042, take a back up copy of the contents
(parameters, programs, etc...) of your SRAM memory of the Fanuc CNC. The back
up copy can be used in case the contents of the SRAM memory are lost
during the replacement.
Dynamic random access memory (DRAM) is a type of random access memory that stores each bit of data in a separate capacitor within an integrated circuit. Since real capacitors leak charge, the information eventually fades unless the capacitor charge is refreshed periodically. Because of this refresh requirement, it is a dynamic memory as opposed to SRAM and other static memory. A20B-3900-0042 
Payment conditions
