The Siemens 6ES5374-1KH21 is a Flash-EPROM memory card designed for use with the SIMATIC S5 programmable logic controller (PLC) systems. This memory module provides 256 KB of non-volatile storage capacity, allowing for the reliable retention of user programs and data configurations within the S5 environment. Featuring a short design, this card is specifically engineered for compatibility with S5 CPU modules requiring external memory expansion or program storage.
Features
Memory Type: Flash-EPROM
Capacity: 256 KB
Voltage: 5V DC
Design: Short form factor for S5 series compatibility
Non-volatile storage for program and data blocks
Technical Specifications
Model
6ES5374-1KH21
Manufacturer
Siemens
Product Type
Memory Card
Memory Capacity
256 KB
Technology
Flash-EPROM
Voltage
5V
System Compatibility
SIMATIC S5
Status
Discontinued (Since 01.10.2006)
Installation Guidelines
Ensure the PLC power is switched off before inserting or removing the memory card to prevent electrical damage or data corruption.
Handle the module by the edges; avoid touching the gold-plated contact pins to prevent oxidation or contamination.
Ensure the card is fully seated in the designated memory slot of the S5 CPU or interface module.
Store in an anti-static environment when not in use to protect the internal Flash-EPROM components.
Verify that the S5 CPU firmware version supports the specific memory capacity of this module.
FAQ
Is this memory card still available from the manufacturer?
No, the 6ES5374-1KH21 was officially discontinued by Siemens on October 1, 2006. It is currently available only through secondary market channels or as refurbished spare parts.
What is the primary use of this module?
This module serves as an external program memory storage device for SIMATIC S5 PLCs, allowing users to load, save, and execute control programs directly from the card.
