Siemens 6ES7954-8LC01-0AA0 Memory Card

The Siemens 6ES7954-8LC01-0AA0 provides reliable memory expansion for SIMATIC S7-300 and S7-400 PLC systems. This memory card stores user programs, hardware configurations, and system data securely. The unit employs high-quality flash technology for long-term data retention and fast access.

Technical Specifications

Parameter	Specification
Product Type	SIMATIC S7 memory card (MC)
Compatibility	S7-300, S7-400 (all CPU versions)
Storage Capacity	512 KB (integrated Flash)
Memory Type	NAND Flash (industrial-grade)
File System	SIMATIC-specific (proprietary)
Data Retention	10 years (minimum, at 25°C)
Write Cycles	100,000 cycles (minimum)
Read Speed	8 MB/s (typical)
Write Speed	4 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 Flash controller, 2 x NAND dies, 1 x regulator
Connector Type	9-pin MC interface (push-pull)
Write Protection	Software-based
Power Supply	3.3V DC (from CPU)
Power Consumption	0.4W (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)

Adequate Storage for Standard Automation Projects

The Siemens 6ES7954-8LC01-0AA0 offers 512 KB of storage for typical S7-300/400 applications. This capacity accommodates medium-sized user programs and parameter sets. The card stores OB blocks, FB blocks, DBs, and hardware configurations. Users can archive multiple project versions with available free space.

Reliable NAND Flash Technology

Industrial-grade NAND Flash ensures dependable data storage for critical automation tasks. The memory retains data for 10 years minimum without external power. Write endurance reaches 100,000 cycles for regular program updates. The controller manages wear-leveling to maximize operational lifespan.

Efficient Data Transfer Speeds

The card achieves read speeds of 8 MB/s for rapid program loading. Write speeds of 4 MB/s reduce project download times significantly. This efficient transfer suits frequent program changes during commissioning. The memory maintains consistent performance across its entire temperature range.

Ultra-Compact SD-Compatible Form Factor

The memory card measures 24 x 32 x 2.1 mm and weighs just 5 grams. This miniature size fits flush into the CPU’s card slot without obstruction. Users can insert and remove the card easily using standard handling. The compact design minimizes impact on the CPU’s overall footprint.

Robust Construction for Industrial Environments

The Siemens 6ES7954-8LC01-0AA0 withstands 100G shocks and 15G vibrations for factory reliability. Operating temperatures from 0°C to +60°C suit most industrial conditions. Storage from -40°C to +85°C ensures long spare-part preservation. The card carries ATEX Zone 2 approval for hazardous locations.

Seamless Integration with S7-300/400 Systems

Users insert the card into the CPU slot for automatic system recognition. The PLC mounts the file system without manual configuration or setup. Programmers can store and retrieve projects using STEP 7 software. The card serves as a portable medium for transferring programs between CPUs.