The Electrical-Instrument--Computer Interface

Techniques of providing useful information about a process to a computer as well as methods by which the computer can control a process are discussed. A summary of typical sensors and actuators which might be found in a paper industry computer control project is included; in addition, there are some recommended guidelines to use in signal transmission, conditioning, and converting. The characteristics of computers which are directly pertinent to process communication are described, along with actual interface devices, in terms of both computer-process information flow and computer backup.