PLCs, Power Supplies & Others

Core Functionality and Application

The Siemens 6ES5374-1KH21 memory card serves as a storage submodule for SIMATIC S5 programmable logic controllers. This Flash-EPROM card stores user programs, data blocks, and configuration parameters securely. It fits the S5-115U, S5-135U, and S5-155U CPU families. Furthermore, the module provides reliable program retention during power outages and system maintenance.

Technical Specifications

The following table details the core technical parameters for the Siemens 6ES5374-1KH21:

Design and Installation Features

The Siemens 6ES5374-1KH21 features a compact short design that inserts directly into the CPU’s front submodule slot. Installation requires no additional cabling or mounting hardware. The module’s lightweight construction places minimal strain on the CPU connector. Flash-EPROM technology ensures permanent data storage without battery dependency. This feature eliminates the risk of program loss due to battery failure.

System Compatibility and Use Cases

The Siemens 6ES5374-1KH21 supports STEP 5 programming environments and works with IM 308-C communication processors . Programmers can use this card with Siemens programming devices (PG) or external EPROM programmers. The memory card accommodates complex control logic and extensive data processing for the S5 platform. Users should note that Siemens has discontinued this product without a direct replacement .

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