Detail RS232 DB-9 Female to RS485 Serial UART Adapter Converter 1.2Km Range
Specification: 1,Data Transfer Rate: 300-115200bps 2,Operating Distance: 1200m for RS485, 5m for RS232 3,Power: None required, uses TD as power source 4,Environment: -10C to 85C, 5% to 95% RH 5,Interface: Compatible with EIA/TIA RS-232C standard and RS-485 standard. 6,Working mode: Asynchronous, half-duplex, differential transmission. 7,T-ransmission media: Twisted-pair or shielded twisted pair (STP). With this item,it is easy to add an RS-485 interface to a PC via RS-232.
Note: - This does not need any AC or DC power. - It uses a particular pump to gain power from RS-232 signal (RTS, DTR, TXD) without initializing the RS-232 series interface.