The Siemens 3UG4501-2AW30 is a SIRIUS 3UG4 analog level monitoring relay for conductive liquids, used to protect against overflow, dry running, or leakage. It features resistance monitoring from 2 to 200 kΩ, a wide control supply voltage of 24–240 V AC/DC, and an adjustable tripping delay of 0.5–10 s. The unit offers a single changeover contact (SPDT), spring-loaded terminals, and DIN rail mounting.
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