Mitsubishi ST1Y2-TE2 Transistor Output Module

The Mitsubishi ST1Y2-TE2 is a compact, slice-type transistor output module from the MELSEC-ST series, designed for industrial automation and control systems. This module provides 2 sink-type transistor outputs, operating at 24V DC with a maximum current of 0.5A per point, making it ideal for controlling small loads such as relays, solenoids, or indicators in PLC-based setups. Key features include photocoupler isolation for enhanced noise immunity, fast response times under 1ms, and compatibility with the ST system bus for easy integration into distributed I/O architectures. Benefits include high reliability in harsh industrial environments, modular design for scalable systems, and low power consumption. Compared to similar modules from competitors like Siemens or Allen-Bradley, the ST1Y2-TE2 offers superior compactness and cost-effectiveness for space-constrained applications. Drawbacks may include limited output points per module, requiring multiple units for larger systems, and dependency on Mitsubishi's ecosystem. Typical applications encompass factory automation, process control, and machine building. Based on image analysis, the unit appears used but in good condition, with visible serial number 0408AAA suggesting a manufacture date around 2004. For detailed resources, refer to the official Mitsubishi datasheet (available at https://www.mitsubishielectric.com/fa/products/cnt/plc/st1y2_te2_datasheet.pdf) and MELSEC-ST system manual.