Siemens 6ES7952-1AM00-0AA0 RAM Memory Card – Obsolete S7-400 Spare Part

Technical Dossier

Product Details And Specifications

Siemens 6ES7952-1AM00-0AA0 RAM Memory Card – Obsolete S7-400 Spare Part

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Note: Electrical parameters not listed here are not independently verified. We do not publish unconfirmed specifications. Contact us for datasheet support.

Solving the Discontinued Hardware Crisis

The SIMATIC S7-400 was Siemens' flagship high-availability PLC platform for large-scale process and manufacturing automation. Installed base units remain operational in facilities across Europe, Asia, and the Americas — many of them running continuous processes where a planned shutdown costs more per hour than the entire annual maintenance budget for the control system.

The 6ES7952-1AM00-0AA0 RAM memory card serves as the working memory extension or program storage medium for specific S7-400 CPU configurations. Without a functional replacement, the CPU cannot execute its loaded program. There is no software workaround. There is no firmware patch. The physical card must be present and operational.

How to extend your S7-400 system life by 5–10 years without a full migration:

Condition & Reliability Assurance

Sourcing obsolete parts from the secondary market carries legitimate risk. DriveKNMS applies a structured 5-step qualification process to every unit before it leaves our facility:

1. Visual and mechanical inspection. Physical examination of the card body, connector pins, and housing for corrosion, mechanical damage, or evidence of prior repair. Units with pin corrosion or bent contacts are rejected at this stage.
2. Electrolytic capacitor assessment. Memory cards that have been in storage or prior service for extended periods are evaluated for capacitor aging indicators. Bulging, leakage residue, or elevated ESR readings result in unit rejection or component-level remediation before re-evaluation.
3. Firmware and label version verification. Where version markings are present on the card, these are cross-referenced against known production records to confirm the unit matches the ordered part number and revision.
4. Functional bench test. Where test infrastructure supports it, cards are seated in a compatible S7-400 CPU environment and verified for recognition and basic read/write operation.
5. Packaging and ESD protection. Qualified units are repackaged in anti-static materials with desiccant. Shipping packaging is selected to prevent mechanical shock during transit.

Key Features for System Maintenance

How do I know the unit is genuine and not counterfeit?
All units sourced by DriveKNMS are physically inspected and, where possible, functionally tested. We do not list units we cannot verify. If you require additional documentation — such as photographs of the physical unit, label close-ups, or test records — request this before committing to purchase.