This SRAM memory card is part of the range Modicon Premium automation platform. It is used in particular in the application program design and debugging phases, it allows all of the application transfer and modification services in online mode and also allows additional data storage. The memory is protected by a removable battery built into the PCMCIA card and a second, auxiliary battery, provides backup so that the main battery can be replaced without data being lost. It has a capacity from 96 to 448 Kb.