The Mitsubishi FX3U-232ADP-MB is a high-performance communication adapter designed for the MELSEC-F series FX3U programmable logic controllers (PLCs). This module seamlessly adds an RS-232C serial communication port to the PLC, enabling robust data exchange with a wide range of external devices. Its key feature is the integrated Modbus RTU protocol support, allowing the PLC to function as either a master or a slave on a Modbus network. This versatility facilitates easy connection to Human-Machine Interfaces (HMIs), inverters, temperature controllers, barcode readers, and other industrial equipment. The compact adapter mounts directly to the left side of the FX3U main unit, providing a space-saving and efficient solution for expanding system connectivity and integration capabilities.