Mitsubishi A42XY-BB Digital Combined I/O Module for MELSEC-F Series

The Mitsubishi A42XY-BB (A42XY-BB) is a combined digital input and output module designed for Mitsubishi MELSEC-F (FX) series programmable logic controller systems. Serving as an equivalent unit to the FX1S30MRD, this compact I/O module provides reliable signal interfacing between field devices and the central processing unit in industrial control environments. The module features a total of 30 digital input and output points, comprising 16 digital inputs rated for 24 V DC operation and 14 digital outputs configured as normally open relay contacts. This configuration enables seamless connection to discrete automation sensors, switches, pushbuttons, and pilot devices, while the relay outputs allow direct switching of external actuators, contactors, indicators, and small solenoids across automated machinery. Built for dependable operation in factory automation processes, the unit ensures stable signal transmission, electrical isolation, and simplified wiring in packaging systems, material handling equipment, assembly stations, and general industrial manufacturing cells utilizing MELSEC-F series control architectures.