Mitsubishi Electric Corporation QX41 Input Unit

Mitsubishi Electric's Melsec-Q QX41 Input Unit is a digital input module for the Q Series MELSEC-Q programmable logic controllers, designed to connect 24V control devices to the PLC. This unit operates on 24V DC and has a current specification of 4 mA per input, enabling straightforward interfacing with common field devices such as sensors and switches that provide 24V signals. As part of the MELSEC-Q input family, the QX41 integrates with the Mitsubishi automation ecosystem, delivering standard-voltage inputs that feed the controller's logic and allow monitoring of discrete signals within a larger automation system. The module is intended for use in a variety of automation environments where 24V control signals need to be read reliably by a Q Series PLC, including setups that require clear, binary input states for sequencing, interlocking, and process monitoring. By using the QX41, engineers can maintain compatibility with widely used 24V devices and simplify wiring within MELSEC-Q controller-based configurations, leveraging the Q family architecture for scalable input expansion.