The I-87017RC is a micro-processor-based instrument for current inputs. It is an economical solution for current inputs. Up to 8 current inputs can be connected to one module. The current input ranges can be 4 ~ 20 mA, 0 ~ 20 mA and +/-20 mA. No external resistor needed for the current input. Up to 200 VDC common voltage protection is provided. It also features per-channel open-circuit detection for the 4 ~ 20 mA range.

For more details, please refer to http://www.icpdas.com/products/Remote_IO/I-87k/I-87017rc.htm