... power needed, optic electric isolation 5KV, is applicable in tough environment. According to different customer need, there are 4 lines, 6 ... ) RS-232 signal: TXD, RXD, GND3) Working: asynchronism, point to point4) Band rate: 300-115,200bps, auto detection serial signal ... Relative humidity: 5% to 95%13) No power supply needed, powered from TXD, RTS and DTR signal in RS-32 port14) Consumption: static ...