MELSEC-Q Series 40-Pin Connector Shape Change Technical Bulletin

This technical bulletin details a change in the 40-pin connector shape (from "Shape 1" to "Shape 2") for specific MELSEC-Q series modules (QY42P, QH42P, QX41Y41P, QX42, QX42-S1) to ensure stable parts procurement, with no impact on specifications or functions. It provides the changeover period based on serial number prefixes (e.g., 180601 or later) and notes a previous reversal from "Shape 2" back to "Shape 1" in earlier versions.