Siemens 6ES5900-7FB11 Memory Submodule

Reliable Firmware Storage for S5-135U/155U CPU Modules

The Siemens 6ES5900-7FB11 memory submodule provides essential EPROM-based firmware storage for SIMATIC S5 CPU 900 processors. This module plugs directly into compatible CPU slots, ensuring stable system operation and reliable data retention. Maintenance engineers rely on this component for maintaining and upgrading existing S5-135U and S5-155U automation setups .

Technical Specifications and Storage Capacity

This memory submodule uses EPROM technology, storing up to 4 kilobytes of firmware data for the CPU system. The non-volatile memory retains its contents without battery backup, ensuring data integrity during power outages. A lightweight design of 0.00 kg allows straightforward installation without mechanical stress. Furthermore, the module integrates seamlessly with the SIMATIC S5 backplane bus.

Parameter	Specification
Brand	Siemens
Model	6ES5900-7FB11
Product Type	Firmware Memory Submodule / CPU 900 EPROM
Memory Technology	EPROM (non-volatile)
Storage Capacity	4 KB
System Compatibility	SIMATIC S5-135U, S5-155U
CPU Compatibility	S5 CPU 900 series
Weight	0.00 kg
Data Retention	No battery required

Physical Design and Installation

This memory submodule features a compact form factor that fits standard S5 CPU slots. The keyed connector design ensures correct orientation during installation. The module’s lightweight construction of 0.00 kg minimizes mechanical stress on the CPU socket. Furthermore, the gold-plated contacts ensure reliable electrical connections over many insertion cycles.

System Integration and Operational Benefits

The Siemens 6ES5900-7FB11 provides reliable firmware storage essential for stable CPU operation. Users can maintain and upgrade existing SIMATIC S5 setups with this dependable module. The EPROM technology ensures data retention without battery dependency, reducing maintenance requirements. Consequently, this memory solution enhances overall system reliability in industrial automation environments.

Compatibility and Application Areas

This memory submodule works with S5-135U and S5-155U systems featuring CPU 900 processors. Users should verify CPU compatibility before installation. The module serves critical firmware storage functions in legacy automation systems. Always handle the module with proper ESD precautions during installation.