The Model 10 is an input loop powered Isolator. It takes any mADC signal from 4 to 50 mADC and provides a corresponding isolated mADC signal on the output. The Model 10 derives it's power from the input mADC loop. The chart on the data sheet details the available ohm drive capability dependent upon the loop voltage available and the current being isolated. It requires no other source of power.