Mitsubishi FX5-16ER-ES Digital I/O Extension Module for MELSEC-F Series

The Mitsubishi FX5-16ER-ES (FX5-16ER-ES) is a combined digital input and output extension module designed for Mitsubishi MELSEC-F (FX) series programmable logic controllers. This compact expansion block provides an additional 16 I/O points to the control system, enabling reliable interfacing with field devices such as sensors, switches, indicators, and actuators. The unit features 8 digital inputs rated for 24 V DC operation and 8 digital outputs equipped with normally open relay contacts. These relay contact outputs offer galvanic isolation and flexible switching capability for external loads. Engineered for seamless integration into MELSEC FX series PLC architectures, the module extends control capabilities without requiring complex configuration. It is also referenced under the equivalent part designation FX516ERES. Typical applications include discrete manufacturing lines, packaging machinery, conveyor systems, and automated machinery that demand expanded digital monitoring and switching performance.