... , zero delay automatic transmit Support EIA RS-232, RS-485 standard RS-232 signal TX , RX, GND RS-485 signal D+, D-, GND Asynchronism ... power supply needed, powered from TXD, RTS, DTR signal in RS-232 port Consumption: Static consumption less than 20mA, dynamic consumption ... 50mAL*W*H: 82mm*33mm*16.5mm Shell: Plastic Color: Black Weight: 50g RS-232/485 Converter(Industrial Port-Powered Isolation )