Siemens 6ES7954-8LF04-0AA0 SIMATIC S7 memory card

A SIMATIC S7 memory card for S7-1x00 CPUs and SINAMICS with 3 V Flash memory and 24 MB capacity.

System function

Rebuilt from individual evidence

System position

Evidence and limits

6ES7954-8LF04-0AA0 is identified in the source as a SIMATIC S7 memory card for S7-1x00 CPUs and SINAMICS, using 3 V Flash memory with 24 MB capacity.

Supplies removable Flash memory for S7-1x00 CPU or SINAMICS program and configuration storage.

System position: sits in the controller or drive memory-card slot, between the engineering load process and the controller or drive runtime.

Unknown: The installed data contents, target device compatibility, write history and physical condition are not established by the source.

Exact reference: 6ES7954-8LF04-0AA0
Category: PLC / CPU
Evidence checked: 2026-09-12

System role

This section explains what the product does and where it acts in the surrounding system.

Function: Supplies removable Flash memory for S7-1x00 CPU or SINAMICS program and configuration storage.
System position: Sits in the controller or drive memory-card slot, between the engineering load process and the controller or drive runtime.
Upstream / inputs: An engineering workstation supplies the program and configuration data written to the card.
Downstream / outputs: The S7-1x00 CPU or SINAMICS device reads program and configuration data from the card.
Limitations: Unknown: The installed data contents, target device compatibility, write history and physical condition are not established by the source.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

The source identifies 6ES7954-8LF04-0AA0 as a SIMATIC S7 memory card for S7-1x00 CPUs and SINAMICS, using 3 V Flash memory with 24 MB capacity.
Confidence: medium
- www.plctop1.com — retrieved 2026-09-12; medium confidence
The source documents that 6ES7954-8LF04-0AA0 supplies removable Flash memory for S7-1x00 CPU or SINAMICS program and configuration storage.
Confidence: medium
- www.plctop1.com — retrieved 2026-09-12; medium confidence

Inferences

Inference: 6ES7954-8LF04-0AA0 occupies this system position: sits in the controller or drive memory-card slot, between the engineering load process and the controller or drive runtime.
Confidence: medium
Rationale: The exact-reference source documents the product identity and its interfaces, software scope or assembly relationship.
- www.plctop1.com — retrieved 2026-09-12; medium confidence

Unknowns

Unknown: The installed data contents, target device compatibility, write history and physical condition are not established by the source.
Confidence: low
Missing evidence: The listing describes the memory card design, not its installed data, target device or physical condition.

System position diagram

A system path places 6ES7954-8LF04-0AA0 between an upstream system and a downstream system. — The source-supported position of 6ES7954-8LF04-0AA0 connects the upstream system to the downstream system.

View Mermaid source

flowchart LR
  upstream["Upstream system"] --> product["6ES7954-8LF04-0AA0"]
  product --> downstream["Downstream system"]

View diagram labels

Nodes: Upstream system; 6ES7954-8LF04-0AA0; Downstream system
Edges: Documented signal or power path; System connection

Next action

The evidence supports a concrete system role for 6ES7954-8LF04-0AA0.

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