The Siemens 6ES5374-1KG11 is a 128 KB Flash EPROM memory card engineered for the Simatic S5 programmable logic controller (PLC) series. This short-type, non-volatile storage module provides a robust solution for maintaining user programs, configuration parameters, and block structures. By utilizing Flash technology, the module ensures data integrity and retention without the need for battery backup, making it an essential component for critical industrial control applications where power cycle reliability is paramount.
Features
128 KB non-volatile Flash EPROM storage capacity.
Short-type form factor designed for seamless integration into Simatic S5 CPU slots.
Battery-free operation ensures long-term data retention exceeding 10 years.
High resistance to electromagnetic interference and mechanical vibration.
Supports reliable read operations for system block structures (OB, FB, FC).
Applications
This memory card is suitable for legacy automation systems in sectors such as chemical processing, water treatment, and heavy manufacturing. It is primarily used to store PLC firmware and user logic, facilitating rapid system recovery and protecting against program loss during unexpected power interruptions.
Technical Specifications
Model
6ES5374-1KG11
Memory Capacity
128 KB
Memory Type
Flash EPROM (Short Type)
Supply Voltage
5 VDC (via CPU slot)
Operating Temperature
0 to 60 deg C
Storage Temperature
-40 to 70 deg C
Data Retention
> 10 years
Installation Guidelines
Ensure the PLC CPU is powered down before inserting or removing the memory card to prevent electrical damage.
Handle the module by the edges to avoid electrostatic discharge (ESD) damage to the internal circuitry.
Align the card carefully with the CPU slot guide rails to ensure proper seating and electrical contact.
Verify that the card is fully inserted until it clicks or seats firmly into the backplane connector.
Store in a clean, dry environment within the specified temperature range when not in use.
FAQ
Does this card require a battery?
No, the 6ES5374-1KG11 utilizes Flash EPROM technology, which is non-volatile and does not require battery buffering to retain data.
Is this compatible with all Simatic S5 CPUs?
This is a short-type memory card designed for compatible Simatic S5 CPU slots. Please verify your specific CPU manual to ensure support for the 128 KB Flash EPROM format.
