... series can conveniently connect up to 8 serial devices to an Ethernet, allowing you to network ... NP308 series can be used to connect different devices for remote management, each serial port operates independently ... TXD,DTR,GND,DSR,RTS,CTS RS-485:Data+,Data-,GND RS-422:TXD+,TXD-,RXD+,RXD-,GNDParity ... side adopt ADDC technology, auto text and control data transfer directionLoading: RS-485/422 side support ...