Siemens Memory Card 6ES7953-8LJ31-0AA0

The Siemens 6ES7953-8LJ31-0AA0 is a SIMATIC S7 Micro Memory Card (MMC), specifically designed for use with SIMATIC S7-300, C7, and ET 200 programmable logic controllers (PLCs).

Specification:

• Product Type: Micro Memory Card (MMC).
• Memory Type: Flash-EPROM.
• Memory Capacity: 512 KB (kilobytes).
• Compatible Devices: SIMATIC S7-300, C7, and ET 200 controllers.
• Dimensions (HxWxD): 32 mm x 24 mm x 1.4 mm.
• Weight: Approx. 2 g.

Features:

• Program Storage and Transfer: The primary function is to store the user program, data, and configuration files, and automatically transfer them to the CPU’s internal RAM during startup or after a memory reset, enabling reliable ROM-based operations.
• Essential Component: For certain S7-300 CPUs that do not have integrated load memory, this micro memory card is a necessary component for the PLC to function fully.