The Siemens 6AV6671-1CB00-0AX2 is a 128 MB MultiMediaCard (MMC) designed for use with various Siemens SIMATIC HMI 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 panels equipped with an MMC slot. This memory card provides essential storage expansion, enabling efficient data handling and system performance for HMI applications. Key features include a rated voltage of 3.3 V DC, with a maximum of 3.6 V DC, and a current consumption of 80 mA. The card supports a maximum write speed of 300 kbit/s and offers over 100,000 write/read cycles per cell, ensuring durability and reliability. The 6AV6671-1CB00-0AX2 is CE and UKCA marked, indicating compliance with relevant European standards. It is also approved for use in hazardous areas, including ATEX Zone 2 and Zone 22, IECEx Zone 2 and Zone 22, cULus Class I Zone 2, Division 2, and FM Class I Division 2, provided that the operating instructions of the target device are followed. The card is manufactured in Germany and is RoHS compliant as of March 31, 2008.