Siemens 6ES7954-8LT03-0AA0 Memory Card

The Siemens 6ES7954-8LT03-0AA0 serves as a high-capacity memory card for SIMATIC S7-1200 and S7-1500 PLCs. This storage medium holds user programs, hardware configurations, and firmware updates. The card provides reliable non-volatile memory for critical automation data.

Technical Specifications

Parameter	Specification
Product Type	SIMATIC S7 memory card (SD-based)
Compatibility	S7-1200, S7-1500 (all CPU versions)
Storage Capacity	2 GB (integrated Flash memory)
Memory Type	SLC NAND (industrial-grade)
File System	SIMATIC-specific (proprietary format)
Data Retention	10 years (minimum, at 25°C)
Write Cycles	100,000 cycles (minimum)
Read Speed	20 MB/s (typical)
Write Speed	10 MB/s (typical)
Dimensions (L x W x H)	24 x 32 x 2.1 mm
Weight	0.005 kg (5 grams)
Internal Components	1 x NAND controller, 2 x NAND dies, 1 x voltage regulator
Connector Type	9-pin SD interface (push-pull)
Write Protection	Software-based (no physical switch)
Power Supply	3.3V DC (from CPU)
Power Consumption	0.5W (typical)
Operating Temperature	0°C to +60°C
Storage Temperature	-40°C to +85°C
Shock Resistance	100G (half-sine, 6ms)
Vibration Resistance	15G (10–500 Hz)
Approvals	CE, UL, CSA, ATEX (Zone 2)

Large Storage Capacity for Complex Projects

The Siemens 6ES7954-8LT03-0AA0 provides 2 GB of storage for extensive automation projects. This capacity accommodates large user programs, multiple HMI faceplates, and firmware archives. The card stores recipe data, machine parameters, and diagnostic logs. Users can archive multiple project versions on a single card.

Industrial-Grade Memory for Reliable Operation

SLC NAND technology ensures superior endurance and data integrity for industrial applications. The memory retains data for 10 years minimum at 25°C without power. Write endurance reaches 100,000 cycles for frequent program updates. The controller manages wear-leveling to extend the card’s operational life.

High-Speed Data Transfer for Quick Uploads

The card achieves read speeds of 20 MB/s and write speeds of 10 MB/s. This fast transfer reduces project download and upload times significantly. Users can update programs and firmware in seconds rather than minutes. The card maintains consistent performance across its operating temperature range.

Compact SD Format for Easy Handling

The memory card follows the standard SD form factor at 24 x 32 x 2.1 mm. This compact size fits easily into the CPU’s card slot without protrusions. The card weighs only 5 grams for negligible impact on the system. Users can insert and remove the card without special tools.

Rugged Design for Harsh Environments

The Siemens 6ES7954-8LT03-0AA0 withstands 100G shocks and 15G vibrations for industrial robustness. Operating temperatures from 0°C to +60°C cover most factory conditions. Storage from -40°C to +85°C ensures long-term spare part preservation. The card carries ATEX Zone 2 approval for hazardous areas.

Simple Integration with S7-1200 and S7-1500

Users insert the memory card directly into the CPU’s dedicated slot for instant recognition. The PLC automatically detects the card and mounts the file system. Programmers can store and retrieve projects using TIA Portal software. The card also serves as a portable transfer medium between multiple CPUs.