The Siemens 3UG5651-2CW31 is a digital monitoring relay for speed supervision, covering 0.1 to 2200 r/min with both overshoot and undershoot detection. It runs on a universal supply of 24 to 240 V AC/DC, 50/60 Hz, and offers adjustable ON delay and tripping delay from 0.1 to 999.9 s. Two changeover contacts with spring-loaded terminals simplify wiring in control panels. The relay carries a SIL 1/PL c safety classification, making it suitable for basic safety-related monitoring tasks.
Compliance and Documentation
RoHS compliant since June 2023. REACH Article 33 disclosure applies due to lead (CAS 7439-92-1) above 0.1% w/w. Export control classification is AL: N / ECCN: 9N9999.