Covers the selection, installation and troubleshooting of analog I/O (input and output) components and circuits used in PLC machine and process control. The operation of A/D and D/A converters in transmitter, valve actuator, variable speed drive and other analog applications is explained. Emphasis is placed on the construction, testing and troubleshooting of analog circuits using a DMM and personal computer.

Topics include noise, shielded cable, ground loops, single ended and differential inputs, resolution, module configuration, RTDs and thermocouples. Additional topics include processing analog data, filters, DC power supplies, current loops, transducers, I/P (current to pressure) converters, word size and input image table.