Siemens 6ES7954-8LF04-0AA0 SIMATIC S7 Memory Card 24MB Flash PLC Memory Card

The Siemens 6ES7954-8LF04-0AA0 is a SIMATIC S7 memory card with 24MB of Flash-EPROM storage, used for firmware and program storage on S7-1x00 CPUs and SINAMICS drives. It supports a minimum of 500,000 write/delete cycles and retains data for 10 years when fewer than 50,000 cycles have been used on the card.

Technical Specifications

Selection Notes

24MB covers firmware plus a moderate S7-1x00 program or SINAMICS parameter set; for larger programs, extensive HMI recipe data, or data logging, a higher-capacity card in the same memory card line is the better fit. The 500,000 write/delete cycle rating is enough for normal program updates and online changes over the CPU's service life, but frequent high-cycle data logging to the card will shorten its 10-year retention window toward the 1-year figure once past 450,000 cycles, so the expected cycle budget is worth checking against the intended use before ordering. The card's compact 24 x 32 x 2.1 mm format and 3g weight match the standard SIMATIC memory card slot on both S7-1x00 CPUs and SINAMICS control units.

Applications

Firmware and user program storage for S7-1200/S7-1500 CPUs and SINAMICS drives, and for transferring or duplicating programs between CPUs on the shop floor.