- RS232 - used in telecommunications standard asynchronous serial binary data transfer between the terminal and connection box.

RS-232 - Interface information transfer between two devices at a distance of 15 meters. The information is transmitted by wire digital signal with two voltage levels. Logic "0" corresponds to a positive voltage (+5 to +15 V for the transmitter) and a logic "1" is negative (-5 to -15 V for the transmitter). Asynchronous data transmission is carried out at a fixed rate at the front of the start bit of self-synchronization.In (fig1) shows two directed data transfer between two ports. To organize the transfer uses the model shown in (fig2)


Fig. 1



Fig. 2