Siemens 6ES5910-0AA21 | SIMATIC S5 Memory Submodule

Technical Overview of the Memory Submodule

The Siemens 6ES5910-0AA21 functions as a plug-in memory submodule for SIMATIC S5 programmable controllers. This submodule stores the user program and system parameters securely. It fits directly into the CPU’s memory slot. The module provides non-volatile storage for critical automation data.

Key Technical Specifications

This section outlines the core parameters for the Siemens 6ES5910-0AA21 memory module. These details will help you verify compatibility with your S5 system.

Parameter	Specification
Part Number	6ES5910-0AA21
Type	Memory Submodule
Product Family	SIMATIC S5
Memory Type	EPROM
Storage Capacity	4 Kbytes
Operating Voltage	5V DC (from backplane)
Dimensions (W x H x D)	Approx. 50 x 25 x 15 mm
Weight	Approx. 0.05 kg
Compatibility	SIMATIC S5-90U, S5-95U, and 115U CPUs
Data Retention	Permanent without external battery

Application and System Integration

This submodule stores your PLC program and retains it even after a power cycle. Users can easily insert the Siemens 6ES5910-0AA21 into the designated socket on the CPU. The EPROM technology ensures reliable data preservation over many years. This memory solution eliminates the need for battery-backed RAM in many applications.

Reliability and Performance Advantages

The permanent memory retention makes this submodule exceptionally reliable. It protects your program from data loss due to power interruptions. Moreover, the compact design requires minimal cabinet space. Engineers often choose the Siemens 6ES5910-0AA21 for its simplicity and dependability.