Siemens 6ES7952-1AM00-0AA0 SIMATIC S7 Memory Card MC 952
Siemens SIMATIC S7 Memory Card
MC 952
6ES7952-1AM00-0AA0 datasheet
Place of Origin:
Germany
Brand Name:
Siemens
Siemens SIMATIC S7 Memory Card
,MC 952
,6ES7952-1AM00-0AA0 datasheet
Siemens 6ES7952-1AM00-0AA0 RAM Memory Card
6ES7952-1AM00-0AA0 is a Siemens SIMATIC S7-400 RAM memory card in the long design, with a memory capacity of 4 Mbyte. It is used to expand the CPU load memory in an S7-400 automation system.
The RAM card is installed in the CPU memory-card slot and is loaded using a programming device. Unlike a Flash card, it does not retain its contents when removed from the CPU; backup power is required to retain its contents during a power interruption while installed.
Technical Specifications
Additional product data for identification and electrical reference.
Technical Data · 6ES7952-1AM00-0AA0
Maximum 100 mA
Maximum 60 µA
The RAM card has no built-in backup battery. Data retention depends on the S7-400 CPU backup arrangement and the card remaining installed.
RAM Card Function in the S7-400
4 MB RAM
Additional load-memory capacity for an S7-400 CPU user program.
01 · Insert the RAM Card
The card is inserted into the memory-card slot on the S7-400 CPU. The CPU slot accepts the card in its keyed insertion position.
02 · Load the User Program
A programming device is used to load the complete user program or individual program elements into the RAM card while it is installed in the CPU.
03 · Retain Data with Backup Power
If the card remains in the CPU and the CPU remains in the rack, a functioning power-supply backup battery or external backup voltage can retain the RAM-card contents after power is switched off.
Application & Fault Scenarios
Typical System Application
Used in Siemens SIMATIC S7-400 PLC systems to expand CPU load memory. It is relevant to established control systems whose user programs require additional load-memory capacity.
Maintenance & Downtime Context
Maintenance teams may search for this card when an installed RAM card is missing, damaged, unreadable or needs replacement. Loss of stored program data or unavailable load memory can delay program restoration and extend PLC or machine downtime.
RAM Data Retention
Important Before Removing the Card
The RAM card has no built-in backup battery. Its stored data is lost when the card is removed from the CPU. When the card remains installed, the contents can be retained after power-off only when the S7-400 backup battery or external backup voltage is functioning. Check the program backup and the CPU backup arrangement before maintenance.
Frequently Asked Questions
1. What is Siemens 6ES7952-1AM00-0AA0 used for?
It is a 4 Mbyte RAM memory card for the SIMATIC S7-400 system. Its function is to expand the CPU load memory.
2. Is 6ES7952-1AM00-0AA0 a RAM card or a Flash card?
It is an MC 952 RAM card. It is not a Flash-EPROM card.
3. Will the program remain on the card after it is removed?
No. The RAM-card contents are lost when the card is removed from the CPU. The card has no built-in backup battery.
4. Does the RAM card retain data when the S7-400 is powered off?
It can retain its contents when it stays installed in the CPU and the CPU remains in the rack, provided a functioning backup battery or external backup voltage is available.
5. What should be checked before replacing this memory card?
Confirm the complete order number, the S7-400 CPU requirements, the program backup and the backup-power arrangement. The S7-400 memory-card replacement procedure requires the CPU to be set to STOP and the CPU memory to be reset after the new card is inserted.
AMIKON Industrial Supply
Support for Industrial Maintenance
AMIKON supports industrial maintenance and procurement teams with automation parts sourcing, part-number communication and order coordination. Our focus is practical support for replacement requirements and ongoing equipment maintenance.
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