6ES7297-0AX30-0XA0

https://www.eisac-automation.com/web/image/product.template/86798/image_1920?unique=c8bcfec

SIMATIC S7-1200, Battery Board BB 1297 for long-term buffering of the real time clock, plug-in in the signal board receptacle of the S7-12XX (FW3.0 or higher)

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