The 6ES7954-8LF04-0AA0 is a pre-formatted Flash memory card for SIMATIC S7-1×00 CPUs and SINAMICS drives. It stores the complete project — program, configuration, and data — directly inside the CPU, so you can replace a controller without a laptop and without reloading the program. The card arrives ready to use out of the box.

Endurance & Data Retention

• 500 000 write/erase cycles minimum: the Flash-EPROM architecture supports extensive data logging and frequent program modifications without wearing out prematurely.
• 10‑year data retention: guaranteed when the accumulated write count stays below 50 000. If the card approaches its end of life (above 450 000 cycles), data retention reduces to 1 year, giving you a clear maintenance window for replacement.
• 3.3 V operation: low power consumption, fully compatible with the internal memory bus of S7-1×00 CPUs.

Key Specifications

• 24 MB capacity: covers typical S7-1200 and S7-1500 projects including multi‑axis motion, HMI connection, and moderate data logging.
• Compatible with: all SIMATIC S7-1×00 CPUs (S7-1200, S7-1500) and SINAMICS drives.
• Spare‑part compatible: replaces older 6ES7954-8LF03-0AA0 cards with the same 24 MB capacity.
• Compact: 24 × 32 × 2.1 mm, approx. 3 g.

Technical Specifications