1、Adopted of high quality electronic components, and accuracy process, ensure for the durability 2、This converter is compatible with RS-232C and RS-485 standards 3、It converts single-ended PS-232 signals into balanced RS-485 differential signals and extends communication distance to 2 kilometre 4、The converter is passive and does not require an external power supply 5、Widely used in industrial automation, canteen sales systems, employee attendance management, highway toll stations, etc. 1 x Converter Adapter Condition: 100% Brand newItem Type: Converter AdapterInterface: EIA/TIA compatible RS-232C standard and RS-485 standardElectrical Interface: RS-232 is a DB9 female (hole), RS-485 is a 4-bit terminalWorking Mode: Asynchronous, half duplex. Differential transmissionTransmission Medium: Twisted pair or shielded twisted pairCommunication Rate: 300-115200bpsSize: Approx. 57 x 37 x 17mm / 2.2 x 1.5 x 0.7inWorking Environment: 2-50℃, relative humidity 5%-95% (commercial working environment is 0-70℃), (industrial working environment is -20-85℃)Communication Distance: 1200 meters (RS-485 end), 5 meters (RS-232 end)