The DN-831I-100V-500A is 1-channel voltage attenuator and 1-channel current transformer. The maximum voltage input range is from +/- 100 V can be attenuated to ±10 V and the maximum current input range is from +/- 500 A can be attenuated to ±10 V. It provides 3000 VDC intra-modules isolation and 3000 VDC channel to channel isolation to avoid the noise interference from inputs to outputs or channel to channel. It can be used with the analog input modules such as I-7017 and I-87017 etc. to measure the high current.