The Yokogawa F3XD64-3F is a high-density 64-point digital input module for the FA-M3 series Programmable Logic Controllers (PLCs). It is designed to interface with a large number of field devices such as sensors, switches, and relays, converting discrete signals into digital data for the PLC CPU. This module supports sink or source input configurations and is engineered for reliable operation in industrial environments with high noise immunity and isolation.