RS232 To RS485 Converter Adapter Data Transfer Rate: 300-115200bps . Operating Distance: 1200m for RS485, 5m for RS232 T-ransmission media: Twisted-pair or shielded twisted pair (STP). Power: None required, uses TD as power source . Environment: -10C to 85C, 5% to 95% RH Interface: Compatible with EIA/TIA RS-232C standard and RS-485 standard. Working mode: Asynchronous, half-duplex, differential transmission.