SIMATIC S7-200 SMART, CPU SR30, Standard CPU Module, Relay Output, 220 V AC or 110 V DC Power Supply, 18 Inputs/12 Outputs
$239.30 – $265.88
CPU SR30, standard CPU — 18DI/12DO relay, AC or DC power input. [VERIFIED via Siemens official datasheet]
Technical Specifications
| Variant | SR30 AC/DC/Relay |
| Digital I/O | 18 DI 24V DC / 12 DO Relay 2A |
| Power Supply | AC 85–264V or DC 110V |
| 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
Mid-entry relay-output standard CPU sized between SR20 and SR40, suited for small to mid-size machines requiring relay switching.






