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6ES7952-1AP00-0AA0

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Siemens 6ES7952-1AP00-0AA0 is a long-format 8 MB RAM memory card that expands load memory for compatible SIMATIC S7-400 CPUs.
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Technical specifications for 6ES7952-1AP00-0AA0

  • Manufacturer:
    Siemens
  • Part Number:
    6ES7952-1AP00-0AA0
  • Product Family:
    Siemens Simatic S7-400
  • Product Type:
    8 MB RAM Memory Card
  • Stock:
    1
  • Card Designation:
    MC 952
  • Memory Type:
    RAM
  • Memory Capacity:
    8 MB
  • Card Format:
    Long design
  • Controller System:
    SIMATIC S7-400
  • Typical Current at 5 V:
    45 mA
  • Maximum Current at 5 V:
    100 mA
  • Typical Backup Current:
    5 µA
  • Maximum Backup Current:
    60 µA
  • Weight:
    0.13 lbs (0.06 kg)
  • Estimated shipping dimensions:
    13.5x9.3x1.5cm
  • Tariff Code:
    85235110
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals RAM Capacity CPU Link Backup Current Card Format

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.
Description
Siemens 6ES7952-1AP00-0AA0 is an MC 952 long-format RAM memory card with an 8 MB capacity for SIMATIC S7-400 CPUs. It provides the CPU with removable load memory for program blocks and project data that exceed the controller's internal storage allocation.

When 6ES7952-1AP00-0AA0 is inserted in the CPU memory-card slot, the processor addresses the card as RAM rather than flash memory. Program changes can therefore be written directly during engineering, while retention depends on the S7-400 backup supply rather than on nonvolatile flash cells.

The 5 V interface current of 6ES7952-1AP00-0AA0 is drawn through the CPU slot, and the documented backup current keeps the RAM contents available when main power is removed. A missing or depleted backup source can therefore affect stored data even though the card itself remains mechanically installed.
Alternative Names
6ES79521AP000AA0 6ES7952 1AP00 0AA0 Siemens 6ES7952-1AP00-0AA0 MC 952 8 MB RAM card SIMATIC S7-400 8 Mbyte RAM Memory Card 6ES7952-1AP00-0AA0 long memory card Siemens MC952 RAM 8MB S7-400 load memory card 6ES7952-1AP00-0AA0
Technical notes
For compatible SIMATIC S7-400 CPUs, Siemens 6ES7952-1AP00-0AA0 supplies 8 MB of removable RAM load memory in the long card format.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Why can 6ES7952-1AP00-0AA0 lose its program even though the card stays installed?
Siemens 6ES7952-1AP00-0AA0 uses RAM, so retained content depends on the S7-400 backup supply and can be lost when that retention path is unavailable.
How is 6ES7952-1AP00-0AA0 different from an S7-400 flash memory card?
The 6ES7952-1AP00-0AA0 is writable RAM with backup-current requirements, while a flash card retains data without the same RAM backup dependency.
What should be verified before moving 6ES7952-1AP00-0AA0 to another CPU?
Before moving 6ES7952-1AP00-0AA0, confirm CPU support for the long MC 952 format, back up the project, and protect the RAM retention supply.
Why does the CPU reject 6ES7952-1AP00-0AA0 even when the capacity is sufficient?
A compatible capacity alone is not enough for 6ES7952-1AP00-0AA0; the CPU must also support the MC 952 RAM card type and long mechanical format.
Which electrical load does 6ES7952-1AP00-0AA0 add to the CPU?
Siemens 6ES7952-1AP00-0AA0 draws about 45 mA typically and up to 100 mA from the 5 V card interface, plus its documented backup current.