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MELSEC-Q Series Ethernet Modules 10Mbps Communication Precautions

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This technical bulletin details precautions for using specific MELSEC-Q series modules (e.g., QJ71E71-100, QJ71MT91) at a communication speed of 10Mbps, noting a change from 10BASE-T to 10BASE-Te standard. It advises that normal communication may fail with some external devices and recommends adding a switching hub (such as the NZ2EHG-T8N) as a corrective measure.

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