PILZ S1UM 24VAC/DC UM 0.1-500VAC/DC – 827220 | JUAL PILZ S1UM 24VAC/DC UM 0.1-500VAC/DC – 827220 – Voltage monitoring relay, to monitor min. and max. voltage values, 12 measuring ranges 0.1 – 500 V AC/DC selectable, 0.40 -400 Hz, width = 22.5 mm, UB = 24 V DC.