SMAKN Rs232 to Rs485 Db 9 Pin Interface Converter Transmitter 100% Brand New Electronic interface: At the side of RS-232 is a DB9 female (hole-type) connector. At the side of RS-485 is a DB9 male (needle-type) connector, with connection board. Uses with this item Adding an RS-485 interface to a PC via RS-232 is now a snap. This interface converter does this without requiring any AC or DC power. Features a female DB9 connector(EIA/TIA), thus allowing it to be plugged directly into any one of the PC's Com ports. It uses a particular pump to gain power from RS-232 signal (RTS, DTR, TXD) without initializing the RS-232 series interface. HXSP-422 series converter is bi-directional connector converter between RS-232 and RS-422; it is mainly used for communication between main controller machines, main controller machine and SCMs or Peripherals, point to point and point to points remote communicate network, it achieve request-response communication between multi-machines, it is mainly used for the field of electricity, industrial automatic control, IC card billing system; such as one card solution, access control system, parking system, and so on.