24 MByte Flash-EPROM for S7-1x00 CPUs
The Siemens 6ES7954-8LF02-0AA0 is a SIMATIC S7 memory card providing 24 Mbyte of Flash-EPROM storage for S7-1x00 CPUs and SINAMICS drives. It is a spare part — the mature lifecycle designation means this card is no longer the primary production variant but remains available through distribution channels. Rated for a minimum of 500,000 write/delete cycles, with data retention of 10 years after final programming when write cycles stay under 50,000. At higher write counts exceeding 450,000 operations, retention drops to 1 year — relevant for applications with frequent recipe or firmware updates.
Physical Fit and Installation
Operates at 3.3 V logic level, matching the CPU's internal memory bus. The Flash-EPROM type retains program and data without battery backup.
Marked as a spare part at mature lifecycle stage — this card is not in active new-production volume but is sourced to order against RFQ through independent distribution. For BOM planning: confirm the CPU model supports this card. The S7-1200 and S7-1500 families accept this form factor; older S7-300/400 CPUs use a different memory card standard.