A20B-3900-0020
Fanuc A20B-3900-0020 SRAM memory plugin module. This 3MB SRAM memory card provides static ram similar to CMOS style ram for sophisticated controls such as 16i and 18i model A generation plug in module. This 3MB memory card with part number A20B39000020 plugs into the main system board most probably a A20B-8100-013x series.
DNC currently have these 3MB SRAM memory modules in stock. Can either be used as an upgrade or a replacemend for faulty hardware. If you are unsure if this memory board is at fault; then contact us as we can check, inspect your complete control.