SIMATIC S7-200 SMART V3.0 PLC CPU SR40 Standard CPU Module, AC/DC/Relay, 24 Inputs/16 Outputs
$371.78 – $413.09
CPU SR40, firmware V3.0 — AC powered, relay outputs, 80KB program/data memory, dual-port connectivity, dual signal board slots, motion functions, web server support. [VERIFIED via Siemens official datasheet]
Technical Specifications
| Variant | SR40 AC/DC/Relay |
| Digital I/O | 24 DI 24V DC / 16 DO Relay 2A |
| Power Supply | AC 85–264V, 47–63Hz |
| Program/Data Memory | 80 KB (V3.0; older versions: 40KB) |
| V3.0 Hardware Upgrades | Dual-port connectivity, dual signal board slots, up to 8 expansion modules, CAM/gear motion functions, web server |
| 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
AC-powered relay-output V3.0 CPU, suited for installations requiring AC mains power with direct relay switching, benefiting from the V3.0 generation’s expanded memory and dual-port networking.






