Rs232 And Rs485
Data transfer is broadly classified as single ended and differential. RS232,which was meant for single ended was launched in 1962, and despite its limitations, has remained in use till today. RS232 allows for data transfer at relatively slow speeds (up to 20K bits/sec) and shortdistances (up to 50 ft).
When data transfer has to take place over long distances, and also at a faster rate, single ended methods prove to be inefficacious. This is when differential datatransmission comes into picture as it provides superior performance. These signals negate the bad effects of ground shifts and induced noise signals on a network. RS422 was produced to meet such requirements,but over time it has been found that RS422 cannot be used to construct a true multi point network. Enter RS485, which meets all the requirements of a truly multi point network. RS485 specifies up to 32drivers and 32 receivers on a single bus. RS485 drivers are also capable of handling the problem of data collision and bus fault conditions.
There are many differences between RS232 and RS485 and...
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