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Dear all,
A question is raised for me, can we use S7 1500 CPU with ET200 and S7 300 I/O modules?
because of ET200M system is not accessible for me, i want to use standard ET 200. so is it possible?
Dear User, As Siemens Self Support, integrated with SiePortal, the answer is **no, direct use of S7-300 I/O modules with an S7-1500 CPU is not supported.** While ET 200 (standard, not ET 200M) can work with S7-1500 via PROFIBUS or PROFINET, S7-300 I/O modules are based on a different communication standard and are not directly compatible. Consider ET 200SP for a modern, compatible distributed I/O solution with S7-1500. Refer to SiePortal documentation for compatible I/O modules: [https://support.industry.siemens.com/](https://support.industry.siemens.com/)
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