ISO Z-W-O1 small volume (12 pin single in line IC package SIP12 pin) low-cost passive two-wire 4-20mA loop fed thermistorSignal isolation transmitterIt is mainly used for the acquisition, isolation, and transmission of signals from three wire, four wire, or two-wire Pt10/Pt100/Pt1000 or Cu50/Cu100 temperature sensors. The solution is used for temperature detection in industrial sites, which can convert the temperature signal collected by the thermistor sensor into a linear proportional standard 4-20mA current signal output according to the change amount.

ISO Z-W-O1 adopts electromagnetic isolation mode and high-efficiency post feeding technology, which can achieve precise isolation and conversion of temperature signals output by thermal resistance sensors to 4-20mA standard signals without the need for independent power supply. It can be directly matched with analog input ports of various commonly used instruments and meters (such as PLC, DCS systems, etc.). The IC contains signal modulation and demodulation circuits, signal coupling isolation conversion circuits, high-performance DC-DC boost circuits, signal zero points, full-scale calibration circuits, Pt100 thermal resistance linearization, long line compensation, interference suppression circuits, etc. The output circuit has a wide voltage range (12-36VDC), high conversion accuracy, and good linearity. The full and zero points are adjusted and calibrated on-site by the user through an external potentiometer.