Siemens logo memory and battery card modules siemens 6ed1056 7da00 0ba0 this add on module for logo 0ba6 generation devices is a combined memory and battery card the memory card is used for copying the logo program with copyright protection the battery card extends the power reserve of logo real time clocks fro 80 hours to 2 years siemens 6ed1056 7da00 0ba0 logo memorybattery card