Features:
- Eight megabytes of RAM provide removable load memory for S7-400 projects.
- The MC 952 long format fits the compatible S7-400 CPU memory-card slot.
- RAM retention depends on the controller's documented backup-current path.
Siemens 6ES7952-1AP00-0AA0 extends the load-memory capacity available to a compatible SIMATIC S7-400 CPU.
Because 6ES7952-1AP00-0AA0 is RAM, engineering changes can be written directly but retained data still depends on backup power.
The 5 V slot supply and backup-current requirements of 6ES7952-1AP00-0AA0 must be considered when diagnosing a card that loses stored content.
The Siemens 6ES7952-1AP00-0AA0 8 MB RAM Memory Card may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES7952-1AP00-0AA0 8 MB RAM Memory Card Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Load-Memory Function
- Capacity: The 8 MB rating is the removable RAM space added to the CPU's load-memory resources.
- Program storage: Program blocks are held on 6ES7952-1AP00-0AA0 for the S7-400 processor to load and execute.
- Project data: Configuration data stored with the program remains available through the same RAM retention path.
- Write behavior: RAM accepts direct engineering writes, so changes do not require a flash erase-and-program cycle.
Connection to the S7-400 CPU
- Slot interface: The long MC 952 edge and body insert into the compatible S7-400 CPU memory-card slot.
- Operating power: The CPU card interface supplies 5 V DC to the electronics of 6ES7952-1AP00-0AA0.
- Project access: During operation, the CPU reads program blocks and project data from the installed card.
- Startup role: At startup, the processor depends on accessible card content before the stored project can be loaded.
RAM Retention Conditions
- Typical backup current: The normal retention demand of 6ES7952-1AP00-0AA0 is documented as 5 µA.
- Maximum backup current: The backup path must be sized for the card's documented 60 µA maximum demand.
- Retention path: Backup current keeps the RAM cells energized when the CPU's main operating supply is removed.
- Missing backup: Without that retention source, the RAM content can be lost because the card does not store data like flash memory.
Identity and Handling
- Card designation: MC 952 identifies the S7-400 memory-card family used by 6ES7952-1AP00-0AA0.
- Memory technology: RAM identifies the writable but backup-dependent storage technology inside the card.
- Mechanical form: The long design must match the CPU slot depth and insertion path before the card is fitted.
- Exact version: The complete 6ES7952-1AP00-0AA0 article number identifies the 8 MB RAM variant, not another capacity or flash version.