The QJ72LP25-25 is a MELSECNET/H remote I/O station module for the Mitsubishi MELSEC‑Q series PLC, designed for high‑speed, long‑distance, and redundant optical network communication三菱電機 Mitsubishi Electric. It acts as a remote I/O node in MELSECNET/H or MELSECNET/10 networks, enabling real‑time data exchange between a master PLC and distributed field I/O stations over duplex fiber‑optic loopsMITSUBISHI ELECTRIC. It supports SI/QSI/H‑PCF/Broadband H‑PCF optical cables, delivering reliable, noise‑immune communication for large‑scale industrial automation systemsMITSUBISHI ELECTRIC.