SIMATIC S7-200 SMART, CPU ST40, Standard CPU Module, Transistor Output, 24 V DC Power Supply, 24 Inputs/16 Outputs
SIMATIC S7-200 SMART, CPU ST40, Standard CPU Module, Transistor Output, 24 V DC Power Supply, 24 Inputs/16 Outputs - Image 2

SIMATIC S7-200 SMART, CPU ST40, Standard CPU Module, Transistor Output, 24 V DC Power Supply, 24 Inputs/16 Outputs

SKU: 6ES7288-1ST40-0AA1 Categories: ,

$354.08 – $393.42

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CPU ST40, standard CPU (-0AA1, pre-V3.0) — 24DI/16DO, 40KB program/data memory, single signal board slot. [VERIFIED via Siemens official datasheet]

Technical Specifications

Variant ST40 DC/DC/DC
Digital I/O 24 DI 24V DC / 16 DO 24V DC
Power Supply DC 20.4–28.8V
Program/Data Memory 40 KB
Note This is the original ST40 (40KB) — not to be confused with the V3.0 variant (-0AA2) which has 80KB memory and dual signal board slots
Security Note Per CISA advisory ICSA-24-165-02, S7-200 SMART CPU firmware versions affected by CVE-2024-35292 (predictable IP ID sequence number, CVSS up to 8.8) should be checked and updated where a network-facing deployment is planned.

Typical Applications

The original ST40 CPU, suited for small to mid-size machines on the established S7-200 SMART platform. Buyers should confirm whether they need this version or the higher-memory V3.0 variant (6ES7288-1ST40-0AA2) before ordering.

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