LOOP POWERED DC CURRENT ISOLATOR 6210 Adept Loop Powered DC Current Isolator 6210 provides galvanically isolated 4 - 20 mA DC output current proportional to 4 - 20 mA DC input current. The isolator derives power from the input itself and therefore no external supply is required. Use of latest circuit techniques and quality components ensure reliable operation over long periods.DC CURRENT ISOLATOR 6220 Adept DC Current Isolator 6220 provides galvanic isolation between field DC Current signal and control room equipment, which utilises reliable optical isolation technique. Higher DC current can be measured with external shunt.