The Siemens 3UG5501-1AW31 is an analog monitoring relay from the Sirius family, designed for level and resistance monitoring applications. It measures resistance from 0.5 to 500 kohm and can be configured for overshoot or undershoot detection, with a trip delay adjustable from 0.5 to 30 seconds. The supply voltage accepts 24 to 240 V AC/DC at 50-60 Hz, making it usable across common control voltages without a separate power supply module. Output is a single changeover contact (1 CO).
RoHS compliant since June 1, 2023. The product group code is 5885 and the group code is R711 — these are internal Siemens cataloging codes useful for cross-referencing in spare parts lists or legacy BOMs.