Siemens SIMATIC S5 EPROM Memory Module 32KB 6ES5377-0AA32

Description

This is a Siemens SIMATIC S5 Memory Submodule, specifically an EPROM with a capacity of 32 Kbytes. This essential component is designed for use with the S5-115U, S5-115H, and S5-115F series of PLCs. As an obsolete part, it is vital for the maintenance, repair, and continued operation of legacy automation systems that rely on the robust SIMATIC S5 platform. This module stores the user program and configuration, ensuring reliable machine control.

Specifications

• Manufacturer: Siemens
• Product Line: SIMATIC S5
• Product Type: Memory Submodule
• Model Number: 6ES5377-0AA32
• Memory Type: EPROM (Erasable Programmable Read-Only Memory)
• Memory Capacity: 32 Kbytes
• Compatibility: Designed for S5-115U/H/F CPUs
• Hardware Version (E-Stand): 04

Label Info

• Brand: SIEMENS
• Model: 6ES5377-0AA32
• E-Stand: 04

Application

The 6ES5377-0AA32 is used in a wide range of industrial applications controlled by Siemens S5-115U systems, including manufacturing lines, process control, and automated machinery. It is the core component for holding the logic that governs machine operations.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this refurbished or new-old-stock part, you are contributing to a circular economy and saving approximately 2.0 kg of CO2 compared to the production of a new replacement system. This is a sustainable choice for your operations.

Availability

This item is an obsolete component but is available from our stock. Order now from PLC2Day for expert support and fast delivery.

FAQ

Question?
Can I reprogram this 6ES5377-0AA32 EPROM module?

Answer

Yes, as an EPROM (Erasable Programmable Read-Only Memory), this module can be erased and reprogrammed. To erase the module, you need a dedicated UV EPROM eraser that exposes the internal chip to ultraviolet light through the small quartz window on the module. Reprogramming requires a Siemens SIMATIC PG programming device or a compatible third-party EPROM programmer.

Question?
What is the "E-Stand 04" on the box, and is it important?

Answer

The "E-Stand" or "Erzeugnisstand" is the version or revision number of the hardware. For SIMATIC S5 components, this can be critical for compatibility with specific CPU firmware versions. E-Stand 04 is a later revision, ensuring broader compatibility and bug fixes compared to earlier versions. Always check your system's requirements, but this version is generally a safe choice.

Question?
Is this module compatible with all SIMATIC S5 CPUs?

Answer

No, this memory submodule is specifically designed for the S5-115U, S5-115H (High Availability), and S5-115F (Failsafe) series of CPUs. It is not compatible with other S5 families like the S5-95U, S5-100U, or the larger S5-135U/155U systems, which use different memory card formats.

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Last Update: Friday, March 13, 2026