Black Box serial adapter

The RS-422/485 Serial Interface Plus is Windows compatible without the need for special software or drivers. Today's mainstream operating systems do not give applications direct control over hardware devices. Applications must make calls to a driver substructure. Therefore, features not supported by existing drivers, such as RS-485, are very difficult to implement because lower-level I/O handling is required. In operating systems that don't have a standard driver to support RS-485 communications, you need to provide the driver development. What's worse, once a driver is developed, it must be maintained to support subsequent releases of the operating system. However, the RS-422/ 485 Serial Interface Plus automatically handles low-level RS-485 driver maintenance via hardware. Therefore, initial development can be targeted for RS-232, debugged, tested, and then implemented as RS-485. The RS-422/485 Serial Interface Plus was designed for simple integration of RS-485 networks - with little or no programming changes - within Windows and other protected-mode operating systems.