Analog I/O System with HART and Modbus Connectivity for PLC/DCS Applications

Programmable logic controllers (PLC) and distributed control systems (DCS) are used for monitoring and controlling both smart (HART capable) and analog-only field instruments found in industrial automation applications. This featured circuit represents a simple DCS system composed of a host and a single node with two 4-channel isolated analog input boards and two 4-channel isolated analog output boards controlled locally by an Arduino form factor baseboard.