How to Select an Interface Relay for PLC Outputs
A step-by-step guide to matching PLC output type, coil voltage and current, contact rating, and socket style when selecting an interface relay.
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The Siemens SIMATIC S7 RAM memory card 6ES7952-0AF00-0AA0 is a 64 Kbyte volatile RAM module in the long-design form factor for SIMATIC S7-400 CPUs, used to expand working memory or hold program data during operation. Unlike flash cards, its contents are not retained without battery buffering, and it must be ordered as the exact memory type and size the CPU firmware expects.
This is a RAM card, not flash — it needs continuous battery buffering in the CPU to retain its contents, unlike the Flash-EPROM cards used on later S7-1200/1500 CPUs. Choose the 64 Kbyte size to match the working-memory capacity the target S7-400 CPU is rated for; a card sized differently than the CPU expects will not be accepted.
Used as the program/working memory card for SIMATIC S7-400 CPUs that require a RAM card rather than the newer Flash-EPROM memory card format.
| eClass | 16 27-24-22-12 |
|---|---|
| ETIM | 10 EC000192 |
| IDEA | 4 6458 |
| UNSPSC | 15 43-20-14-02 |
| General Product Approval Miscellaneous | For use in hazard- |
|---|---|
| General Product Approval EMV | ous locations |
| Part number | 6ES7952-0AF00-0AA0 |
|---|---|
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Phase-out announced by the manufacturer |
| EAN | 4019169009881 |
| ETIM class | EC000192 |
| eCl@ss | 27242212 |
| Net weight | 0.044 kg |
|---|---|
| Country of origin | DE |
| Shipping weight | 0.544 kg |
| Ships from | Türkiye |
| Dispatch | 13 Nov |
| Stock | Low stock |
Source: manufacturer data · Last verified: 01 Nov 2026
No documents are on file for this part yet.
Ask us for the datasheetThe tariff (HS) code on file for 6ES7952-0AF00-0AA0 is 85235110.
The EAN (GTIN) of 6ES7952-0AF00-0AA0 is 4019169009881.
6ES7952-0AF00-0AA0 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival. Stock items are dispatched within 1–2 business days.
A step-by-step guide to matching PLC output type, coil voltage and current, contact rating, and socket style when selecting an interface relay.
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