... a communication port conversion module of USB<->RS232, USB <-> RS485, USB<->LINK (Smartgen ... will flash.3, POWER LED: When the SG72 module successfully connect to USB, this light will be illuminated ... .4, USB interface: Connect SG72 module to the USB interface on PC by the data ... RS485: This is a generic isolation RS485 communication interface.7, RS232-C: This is a generic DB9 serial ...