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.
Once production ends, supply depends on remaining stock.
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The Siemens SIMATIC S7 RAM memory card (6ES7952-1AL00-0AA0) is a long-design load memory module for the S7-400 rack, offering 2 MB of RAM capacity at 58 g weight. It plugs into the CPU memory card slot to hold the user program and requires battery backup to retain data when powered down.
This is a RAM card, not a flash card, so it depends on the CPU's battery backup to retain the program when powered down, unlike the flash memory cards used on newer SIMATIC CPU families. The long design fits S7-400 CPUs that take the longer card format rather than the short card slot, so confirm the CPU's card format before ordering. 2 MB covers small to mid-size S7-400 programs; larger programs need a higher-capacity card.
Load memory for SIMATIC S7-400 CPUs that use the long-format RAM card, for initial program storage during commissioning or as a replacement for an existing S7-400 memory card.
| 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 | 6ES7952-1AL00-0AA0 |
|---|---|
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Phase-out announced by the manufacturer |
| EAN | 4019169009935 |
| ETIM class | EC000192 |
| eCl@ss | 27242212 |
| Net weight | 0.058 kg |
|---|---|
| Country of origin | DE |
| Shipping weight | 0.558 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 6ES7952-1AL00-0AA0 is 85235110.
The EAN (GTIN) of 6ES7952-1AL00-0AA0 is 4019169009935.
6ES7952-1AL00-0AA0 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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