RS232 to RS422/485 변환기 칩 제조 업체중 가장 유명한 FTDI 사에서 직접 기술지원하는 제품입니다.

The ES-R-2001B-M is an RS232 to RS485 / RS422 adapter that support transfer rates up to 1M baud. With RS422 mode selected, the interface can be configured for four-wire operation with CTS / RTS hardware handshaking. In RS422 mode the transmitter is always on. With RS485 mode selected, the interface can be configured for four-wire full duplex operation or two-wire half duplex operation with optional echo back. The transmitter enable is controlled automatically with a turn-around delay of less than 20us. Optional RS422 / RS485 termination and bias resistors can also be configured. The RS232 interface on the ES-R-2001B-M can be configured to be a DCE or a DTE type. The default link settings select a DCE type which allows use of a straight-through DE-9S to DE-9P cable.

• Operating temperature of -20°C to +60°C

Dip Switch On/Off 변경으로 RS422 혹은 RS485 를 선택 사용.