Quad Channel Analog Input Circuit with Open Wire Detection and HART Compatibility for PLC/DCS Applications

This application note provides a complete system suitable for programmable logic controllers (PLCs) and distributed control system (DCS) applications. These applications require multiple voltage inputs with open wire detection and HART-compatible, 4 mA to 20 mA current inputs, with the protection from transient overvoltage or over-current events, which occur in the harshest industrial environments. Because many factories and industrial environments power their PLC/DCS from a 24 V standard bus line, this module is easy to integrate into any existing system.