The DHR 500 C420 from LEM is a Current Transducer with DC Input Current 500 to 1800 A, Output Current 25 mA, Supply Voltage +/- 20 to 50 V, Accuracy 0.01, Temperature Operating Range -40 to 70 Degree C. Tags: Panel Mount, AC Current Transducer, DC Current Transducer. More details for DHR 500 C420 can be seen below.