The CS‑6XX series of current sensors monitor line current for electrical loads such as pumps, conveyors, machine tools or fans and provide an output of 4‑20 mA, 0‑5 Vdc or 0‑10 Vdc (Model specific) to represent the load current. The CS‑650 & CS‑651 series require no external power supply as they are totally powered by induction from the AC line being monitored. The CS‑652 series is loop‑powered and require an external 15‑30 Vdc power supply.