The ABB 1TGE120021R0010, also known as the CM-TCN.2, is a high-performance temperature monitoring relay designed for use with PTC thermistor sensors. This device provides reliable overtemperature protection for critical equipment such as motors, generators, and transformers. It continuously monitors the resistance of the connected PTC sensors and trips its output relay if the temperature exceeds the nominal response threshold, preventing equipment damage and costly downtime. With its compact design, DIN rail mounting, and screw terminals, the CM-TCN.2 is easy to integrate into various industrial control panels and systems, ensuring enhanced operational safety and machine longevity.