Z109S-DI is a device that allows to isolate and convert a 0/4 - 20 mA signals. The device can power also all 2-wire sensors providing a stabilized voltage of 20 V and a max current of 20 mA with short-circuit protection. A 3-way galvanic isolation of 3.500 Vac among Power supply // input // output circuits assures the integrity of your data.