... 485 Converter, Baud Rate Up to 115.2Kbps, Port Powered,Transmission distance: 0 - 1,200 meter at 24AWG ... Features:1) Port-powered RS-232 to RS-485 Converter(2) DB9-S ... 485 interface5) Automatic direction control of transmitting data (T x D), zero-latency design6) Working mode: asynchronous half ... on work attendance gate safety system Port-powered RS-232 to RS-485 Converter(ATC-106)