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siematic s-5, siemens

siematic s-5, siemens

siematic s-5, siemens

(OP)
i have the 135U system such that on CPU1 64KB RAM of type 6ES5377-0BA31 and on CPU2 64kb RAM of type 6ES5377-0AA32 with longer format installed.
i want to replace 64KB RAM on each CPU with EPROM either 128KB. Which type should be purchased amoung the siemens products ??

thanks in advance, if any one helps me.

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