Siemens 6ES5350-5AA21 Memory Module is a SIMATIC S5 350 memory module designed to expand RAM in legacy S5 PLCs. This "A" version features two receptacles for RAM submodules and provides 8 KB of RAM storage in the F.370/371 memory submodule configuration. Used with the SIMATIC S5-350 family, it upgrades program and data memory by adding RAM in the two-submodule arrangement.
