But still, RS has proven to be prominent. Moreover, it has better noise immunity. It is proven to be compatible across different manufacturers for interfacing computer and modems. This standard is used for transmission of information exchange over the telephone lines. The electrical specifications for RS are updated in the year
Do you need - Networked Serial Electronics? Metering, Controllers, Callpoints, Fire panels, access control, lighting, robotics --We design and build-- Call us now! Usually Not. While the normal PC hardware might well run with just Tx, Rx and Ground connected, most driver software will wait forever for one of the handshaking lines to go to the correct level. Depending on the signal state it might sometimes work, other times it might not. The reliable solution is to loop back the handshake lines if they are not used. We specifically chose to use the Personal Computer PC as the frame of reference for the signals on this page.
The RS protocol is a popular serial interface that is used to connect computers to peripheral devices such as modems. We will take a look at the serial port pinouts used to implement RS as well as some additional reference information concerning the protocol. The RS protocol transmits data of wires employing signal levels that differ from the standard 5V in order to minimize signal interference. Distances of up to 20 meters are the limit for reliable data transfer using the RS interface. The basic example of these two types of equipment defines a computer as a DTE device with a modem filling the role of DCE.
There are two types of digital interface to consider I use a USB serial port for RS communications all the time on my projects RS since it is a very useful standard communication module which can be found built-into PICs and most other microcontrollers. Computers used to come with RS and parallel port built-in as standard, but not any more as new computers have USB ports instead. The digital serial unit does away with all RS comms and cables and outputs only digital signals. This is the generates the same as the signals that you get at the microcontroller, after they are decoded at the MAX chip.