Both of these adapters were developed in order to form simple interface between our galvanicaly isolated boards such as REOPTO08 or Piezo sensor converter and PC based controller. RS485 to RS232 and RS422 to RS232 adapters are nonisolated interface converters with internal +5 V voltage regulator (input voltage +6 V to +18 V). There is also possible to use external +5 V power supply provided by galvanicaly isolated board.
RS485 to RS232 adapter RS422 to RS232 adapter