... that can be used to convert any standard USB port (USB 2.0 – backward compatible) into two ... grade design, adds two RS-232 ports to USB port, compatible with MDT,PND.• FTDI 232BL single ... Byte Tx/Rx Buffers• Standard DB9/M RS232 Connector;• RS422/485 with terminals marked• Full Modem ... CE, Mac, and Linux. Industrial Grade, FTDI solution,USB to Dual RS232 converter / adapter /serial cable, applicable ...