Mitsubishi AB6938 Digital AC I/O Module for MELSEC-F FX2N Series

The Mitsubishi AB6938 (AB6938) is a combined digital AC input and output unit designed for integration with Mitsubishi Electric MELSEC-F FX2N series programmable logic controller systems. Serving as an expansion I/O module equivalent to the FX2N-16MR-UA1/UL specification, this discontinued component provides a total of 16 digital input and output points to support local process automation and machine control tasks. The module incorporates 8 digital AC inputs alongside 8 digital relay outputs featuring normally open contacts. This configuration enables seamless interfacing between alternating current field input devices, such as switches and sensors, and external electromechanical actuators or pilot devices operating across industrial machinery. Built for dependable switching performance in factory automation environments, the unit allows direct connection within compatible FX2N controller setups to expand existing control capabilities. It is suitable for maintenance, replacement, and system retrofit applications requiring mixed AC input and relay output functionality.