Mitsubishi A68DAI-S1 AC Digital Mixed I/O Module for MELSEC-F Series

The Mitsubishi A68DAI-S1 (A68DAI-S1) is a mixed AC digital input and output module designed for use with Mitsubishi Electric programmable logic controller systems, specifically within the MELSEC-F FX series architecture. Functioning as a combined input/output interface, this unit provides automation systems with expanded digital control capabilities by consolidating both AC signal sensing and relay switching into a single compact device. The unit features a total configuration of 24 digital input and output channels. This includes 12 digital AC inputs engineered to detect external alternating-current switching signals, alongside 12 digital outputs utilizing normally open relay contacts for driving actuators, contactors, indicators, and auxiliary loads. It is recognized as equivalent to unit designation FX24MRUA1UL, making it suitable for direct replacement, retrofits, and maintenance operations on legacy machinery. Typical industrial applications include production lines, packaging equipment, material handling setups, and process machinery where reliable AC logic input monitoring and robust relay contact switching are required. This discontinued spare part enables continued operation and minimizes downtime across installations reliant on MELSEC control platforms.