Line converters or level converters are widely used in the industry. Manufacturers all around the world Uses different protocol as suited to their needs. Wherever it is necessary to make that particular protocol suitable, one requires a line converter or so called level converter. For or so called level converter. For example a data logger offers RS 232 protocol for data download. And your requirement is to download the place where data loggers are installed. Then a Rs232 to 485 converters plays an important role. The RS 485 shall not only club many of data loggers on simple two wires, but also relay the data to a long distant.