The Siemens 3UG5501-2AW31 is an analog monitoring relay from the Level monitoring family, designed for level and resistance monitoring across a 0.5 to 500 kohm range, with overshoot and undershoot detection. It operates on a universal supply voltage of 24 to 240 V AC/DC at 50/60 Hz, and offers a configurable tripping delay from 0.5 to 30 seconds. The output is a single changeover contact with spring-loaded terminals, and it supports 2-step or 1-step control. It carries a SIL 1/PL c rating for functional safety and is WHG-compliant for water hazard applications.
Packaged singly, with dimensions 127 x 111 x 38 mm. The tripping delay is adjustable via a front-panel potentiometer or DIP switch (depending on variant), so set it before commissioning to match the process response time.