Siemens 6AV6671-1CB00-0AX2 is a 128 MB SIMATIC multimedia memory card designed for use with Siemens HMI devices equipped with MM card slots. It is compatible with a wide range of panels including OP 77B, TP/OP 177B, TP/OP 277, C7-635, MP 177, MP 277, MP 377, Mobile Panel 177, Mobile Panel 277, and other HMI models. The card provides essential storage for configuration data, runtime logs, recipes, alarms, and system backups, playing a critical role in stable and reliable HMI operation.
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