The converter is compatible with RS-232 and RS-485 standards, and can convert single ended RS-232 signals to balanced differential RS-485 signals. The transmission rate of the converter is 300-115.2Kbps, which can extend the RS-232 communication distance to 1.2km, The internal system is equipped with zero delay automatic transceiving and transmitting conversion. The unique I/O circuit automatically controls the direction of data flow without any handshake signals (such as RTS, DTR, etc.). It can be used to form a point-to-point, point to multipoint remote multi computer communication network between the main control computers, between the main control computer and the microcontroller or peripheral devices. It is widely used in industrial automation control system, access control system, parking lot system, self-service banking system, highway toll station system, etc. Product name： UOTEK Mini RS-232 to RS-485 Converter Model： UT-2201 ● Standards: RS-232C, RS-485 EIA/TIA ● Connector: RS-232 DB9 female; RS-485 DB9 male, with terminal block ● Working mode: asynchronous half-duplex differential transmission ● Transmission media: Twisted-pair or shielded cable ● Baudrate: 300bps-115.2Kbps ● Dimension: 63mmX33mmX17mm ● Operating temperature: -25℃ to 70℃ ● Relative humidity: 5% to 95% ● Transmission distance: 1,200m(RS-485), 5m(RS-232)