SIMATIC S5 375 RAM program memory for documented legacy controller configurations
The Siemens 6ES5375-0LD21 is a SIMATIC S5 series 375 RAM memory module. Siemens S5-115F and S5-115H documentation lists this exact article with a capacity of 16 × 2^10 bytes, equivalent to 16 KB. It is intended for program-memory use in compatible legacy S5 controller configurations and should only be installed after the CPU type, memory-module support, program backup and commissioning procedure are verified. Because S5 hardware can have strict generation and memory requirements, procurement must match the complete 6ES5375-0LD21 suffix and the existing controller documentation rather than treating another 375 module as interchangeable.
| Item | Status | Basis |
|---|---|---|
| Product Condition | Original new | Stockoems commercial term |
| Availability | In stock | Stockoems commercial term, subject to order verification |
| Warranty | With 1 year warranty | Stockoems commercial term |
Condition, availability and warranty are Stockoems commercial information and are not Siemens manufacturer commitments.
| Parameter | 6ES5375-0LD21 verified value |
|---|---|
| Manufacturer / platform | Siemens / SIMATIC S5 |
| Complete article number | 6ES5375-0LD21 |
| Product type | Series 375 RAM memory module |
| Memory type | RAM |
| Memory capacity | 16 × 2^10 bytes (16 KB) |
| Documented controller references | SIMATIC S5-115F and S5-115H manuals |
| Primary role | Program memory for a compatible S5 configuration |
| Check | Requirement |
|---|---|
| CPU compatibility | Verify the exact S5 CPU and supported memory-module type |
| Capacity | Confirm that the project requires 16 KB RAM |
| Program handling | Create and validate the required program backup before exchange |
| Commissioning | Follow the system-specific insertion and startup procedure |
| Identity | Match the complete 6ES5375-0LD21 label; do not substitute another 375 suffix |
The Siemens manuals used to verify 6ES5375-0LD21 identify the exact hardware and memory capacity but do not state a PLM category. No lifecycle classification is assigned on this page.
It is a Siemens SIMATIC S5 series 375 RAM memory module.
Siemens manuals list 16 × 2^10 bytes, equivalent to 16 KB.
The exact article appears in Siemens S5-115F and S5-115H documentation.
No. Memory type, capacity, CPU compatibility and suffix must be checked independently.
The manuals used for this page do not state a PLM category for the exact article.
Verify the CPU, capacity, program backup, commissioning procedure and complete article label.
Send us the complete part number, required quantity, destination country and product label photos. Our team will check availability, condition, compatibility requirements and shipping options.
Our service process combines identity checks, technical review, visual evidence, careful logistics and documented after-sales communication without promising unverified quantities or lead times.
| Stage | Service action | Buyer evidence |
|---|---|---|
| 1. Identity | Model and suffix verification | Exact label match for 6ES5375-0LD21 and 16 KB RAM description |
| 2. Condition | Condition confirmation; product and label photo confirmation | Clear full-unit, label, connector and housing images |
| 3. Technical fit | Technical compatibility review | S5 CPU, RAM capacity, program backup and commissioning procedure checked |
| 4. Packing | Protective packaging | Sensitive surfaces and connectors protected against transit damage |
| 5. Logistics | Worldwide shipping, shipment tracking and customs documentation | Destination and documentation requirements reviewed |
| 6. After sales | Written warranty terms, return authorization process and after-sales response | Commercial terms recorded before order placement |
A qualified supplier should verify the exact manufacturer and complete part number, provide current label photos, describe condition in writing, review compatibility, issue consistent documents, use protective packaging and provide traceable shipping records.
Risk signals include missing label evidence, incomplete suffix handling, unexplained specification changes, unverifiable stock claims, inconsistent company details, vague return procedures or promises of universal compatibility.
Check the full suffix, supported S5 CPU, 16 KB RAM requirement, program backup and commissioning procedure before exchange.
For model verification, photo evidence, compatibility review, packing details, shipping options or after-sales communication, contact our team.
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