Siemens SIMATIC S7 Memory Card 6ES7954-8LP03-0AA0

Technical Dossier

Product Details And Specifications

Siemens SIMATIC S7 6ES7954 Series Technical Notes

The Siemens SIMATIC S7 Memory Card series (6ES7954) is a standardized removable flash-based storage medium used across the SIMATIC S7-1200 and S7-1500 programmable logic controller families. These cards serve as the primary non-volatile storage for user programs, hardware configurations, data blocks, and firmware packages. Deployed across global heavy industry — including petrochemical refineries, nuclear power auxiliary systems, offshore platforms, and continuous-process chemical plants — the 6ES7954 series has become a de facto standard for program portability and controller recovery in safety-critical environments. The 6ES7954-8LP03-0AA0 specifically provides 24 MB of usable FEPROM storage, compatible with S7-1x00 CPU families, and supports SIMATIC Automation Tool-based firmware updates.

The Evolution of 6ES7954 Architecture

The 6ES7954 memory card line was introduced alongside the S7-1200 platform (circa 2009) and subsequently extended to the S7-1500 platform (2012 onward). Early variants in the 8LC and 8LE sub-series offered capacities from 2 MB to 4 MB, sufficient for compact machine-level programs. As IEC 61131-3 structured text programs grew in complexity and firmware packages expanded, Siemens introduced higher-density variants (8LF, 8LG, 8LH, 8LJ, 8LL, 8LP, 8LT) scaling from 8 MB to 2 GB. The 8LP03 generation (24 MB) represents the mid-range density tier, balancing cost and capacity for mid-size S7-1500 installations. All variants share the same physical SIMATIC Memory Card form factor and are not interchangeable with legacy S7-300/400 MMC cards. Compatibility is strictly limited to S7-1x00 CPUs; use in S7-300/400 requires the separate 6ES7 9xx-series MMC product line. As the S7-1200/1500 platform matures, the 6ES7954 series has entered a stable/mature lifecycle phase with long-term availability commitments from Siemens through at least 2030.

6ES7954 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified, commercially available members of the Siemens 6ES7954 SIMATIC Memory Card series, classified by storage capacity:

6ES7954-8LC03-0AA0: SIMATIC Memory Card, 2 MB, S7-1x00 compatible, program transfer only.
6ES7954-8LE03-0AA0: SIMATIC Memory Card, 4 MB, supports firmware update storage.
6ES7954-8LF03-0AA0: SIMATIC Memory Card, 8 MB, standard capacity for S7-1200 applications.
6ES7954-8LG03-0AA0: SIMATIC Memory Card, 12 MB, extended program and DB storage.
6ES7954-8LH03-0AA0: SIMATIC Memory Card, 24 MB (earlier revision), S7-1500 mid-range.
6ES7954-8LJ03-0AA0: SIMATIC Memory Card, 256 MB, high-capacity for large S7-1500 projects.
6ES7954-8LL03-0AA0: SIMATIC Memory Card, 512 MB, supports recipe and data logging.
6ES7954-8LP03-0AA0: SIMATIC Memory Card, 24 MB, current production, S7-1x00 CPU firmware & program storage.
6ES7954-8LT03-0AA0: SIMATIC Memory Card, 2 GB, maximum capacity variant for data-intensive applications.
6ES7954-8LC02-0AA0: SIMATIC Memory Card, 2 MB, prior hardware revision (HW: 02).
6ES7954-8LE02-0AA0: SIMATIC Memory Card, 4 MB, prior hardware revision (HW: 02).
6ES7954-8LF02-0AA0: SIMATIC Memory Card, 8 MB, prior hardware revision (HW: 02).
6ES7954-8LG02-0AA0: SIMATIC Memory Card, 12 MB, prior hardware revision (HW: 02).
6ES7954-8LJ02-0AA0: SIMATIC Memory Card, 256 MB, prior hardware revision (HW: 02).
6ES7954-8LL02-0AA0: SIMATIC Memory Card, 512 MB, prior hardware revision (HW: 02).
6ES7954-8LT02-0AA0: SIMATIC Memory Card, 2 GB, prior hardware revision (HW: 02).