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Siemens 6ES7954-8LL02-0AA0 — PLC Accessories

Siemens 6ES7954-8LL02-0AA0 256 MB S7 Memory Card

MPN6ES7954-8LL02-0AA0

Siemens S7 memory card, 256 Mbyte Flash-EPROM, for S7-1x00 CPUs, 24 mm wide, 32 mm high, 2.1 mm thick.

$795.00Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

6ES7954-8LL02-0AA0 — Specifications
ParameterValue
Depth2.1 mm
FlashYes
Width24 mm
Height32 mm
Memory size256 Mbyte
Type of memoryFlash-EPROM
Weight, approx.3 g
Number of write (delete operations, min.)200 000
Data retention (after final programming action), min.10 y; If the delete/write processes < 20 000 (1 a if the delete/write processes > 180 000)

Product details

Memory card for S7-1x00 CPUs

The Siemens 6ES7954-8LL02-0AA0 is a 256 Mbyte Flash-EPROM memory card designated as a spare part for SIMATIC S7-1x00 CPUs. It stores the user program, firmware updates, and recipe data, and is the medium the CPU boots from on power-up. Rated for a minimum of 200 000 write/delete operations and 10-year data retention after the final programming action, this card suits applications where program changes are frequent but not continuous — typical for machine commissioning, recipe changes, or firmware upgrades. The retention drops to 1 year if the delete/write count exceeds 180 000, so avoid using it as a high-cycle data logger.

Frequently asked questions

What is the memory size of the Siemens 6ES7954-8LL02-0AA0?

The 6ES7954-8LL02-0AA0 has a memory size of 256 Mbyte, stored on a Flash-EPROM chip.

Is the 6ES7954-8LL02-0AA0 compatible with the S7-1200 CPU?

Yes, the 6ES7954-8LL02-0AA0 is listed as a spare part for SIMATIC S7-1x00 CPUs, which includes the S7-1200 series. It fits the memory-card slot and is used for program storage and firmware updates.

What is the write/erase endurance of the 6ES7954-8LL02-0AA0?

The card is rated for a minimum of 200 000 write/delete operations. Data retention is 10 years after the final programming action if the write/delete count stays below 20 000; retention drops to 1 year if the count exceeds 180 000.

MPN
6ES7954-8LL02-0AA0