Siemens 6AV3971-1NA02-0AA0 Memory Submodule

Technical Overview

The Siemens 6AV3971-1NA02-0AA0 is a memory submodule for the SIMATIC S5 and S7 programmable controller series, designed to store user programs and system configuration data . This unit uses FLASH EPROM technology to provide non-volatile memory storage, retaining program data securely without a backup battery . The Siemens 6AV3971-1NA02-0AA0 plugs directly into compatible CPU modules, making it a straightforward solution for program backup and system expansion .

This memory submodule is fully compatible with the STEP 5 and STEP 7 programming environments, allowing users to store and transfer programs easily. It eliminates the need for battery-backed RAM, reducing maintenance overhead. The submodule’s robust design ensures reliable performance even in harsh industrial conditions. It provides a cost-effective solution for expanding memory capacity on existing S5 and S7 systems. The module’s compact form factor allows installation in tight spaces within the PLC chassis.

Technical Specifications

Parameter	Specification
Manufacturer	Siemens
Model Number	6AV3971-1NA02-0AA0
Product Type	Memory Submodule
System Compatibility	SIMATIC S5, SIMATIC S7
Memory Type	FLASH EPROM
Storage Type	Non-volatile
Programming Environment	STEP 5 and STEP 7
Installation	Plugs into CPU module
Data Retention	No battery required
Weight	0.05 kg
Country of Origin	Germany

Key Features

Non-Volatile Storage – The FLASH EPROM technology preserves user programs and system data without a backup battery, eliminating battery replacement concerns.

Dual Platform Compatibility – This submodule works with both SIMATIC S5 and S7 PLCs, providing versatility across different Siemens automation systems.

STEP 5 and STEP 7 Support – Users can store and transfer programs created in both programming environments.

Plug-and-Play Installation – The submodule inserts directly into the CPU slot without special tools.

Reliable Data Retention – The module ensures long-term program integrity for years.

Reduced Maintenance – Battery-free operation lowers maintenance requirements and system downtime.

Applications

The Siemens 6AV3971-1NA02-0AA0 is ideal for program storage, system upgrades, and backup solutions in industrial automation systems. It suits manufacturing, process control, and material handling applications requiring reliable program retention.