Siemens 6ES7952-1AL00-0AA0 SIMATIC S7-400 RAM Memory Card 2MB PLC Memory Card

The Siemens SIMATIC S7 RAM memory card (6ES7952-1AL00-0AA0) is a long-design load memory module for the S7-400 rack, offering 2 MB of RAM capacity at 58 g weight. It plugs into the CPU memory card slot to hold the user program and requires battery backup to retain data when powered down.

Technical Specifications

Selection Notes

This is a RAM card, not a flash card, so it depends on the CPU's battery backup to retain the program when powered down, unlike the flash memory cards used on newer SIMATIC CPU families. The long design fits S7-400 CPUs that take the longer card format rather than the short card slot, so confirm the CPU's card format before ordering. 2 MB covers small to mid-size S7-400 programs; larger programs need a higher-capacity card.

Applications

Load memory for SIMATIC S7-400 CPUs that use the long-format RAM card, for initial program storage during commissioning or as a replacement for an existing S7-400 memory card.