RS232 , RS485 , RS422 and USB are not Protocols those are interface port (connectors) each one has electrics chararcteristics .RS232 is used for short distance (over 15 meter and depends on baud rate ) with level voltage +-/15 volt . RS485 is used for long distance (you can say more than 100 meters ) with low level +-/5 voltage half duplex . RS 422 is used for very long distance over 1 km full duplex . if you want to know what are half duplex , full duplex just postHello
In digital systems, information is generated as bits of zero and one per transmission; The data packet, the number of constituent bits, the beginning and the end of the data are specified as a set of rules or protocols between the sending and receiving devices. Each system can achieve the meaning of data by processing the number of bits of zero and one.
In order for separate circuits to be able to exchange information with each other, they must use a common rule or protocol, this information transfer or data transfer can be done in series or in parallel. Data transfer may take place between a computer, device, microcontroller or other equipment.
So keep in mind that each of Protocols 232 and 485, 422 or USB follows the property rules, and you ca
I can just repeat what Brian said twice: RS232, RS485, RS422 are no protocols.So keep in mind that each of Protocols 232 and 485, 422
... And those distances figures are silly.
Perhaps you can explain the difference in achievable distances 00Kam, in particular why you think RS485 and RS422 are so different.
Brian.
HiHello
In digital systems, information is generated as bits of zero and one per transmission; The data packet, the number of constituent bits, the beginning and the end of the data are specified as a set of rules or protocols between the sending and receiving devices. Each system can achieve the meaning of data by processing the number of bits of zero and one.
In order for separate circuits to be able to exchange information with each other, they must use a common rule or protocol, this information transfer or data transfer can be done in series or in parallel. Data transfer may take place between a computer, device, microcontroller or other equipment.
So keep in mind that each of Protocols 232 and 485, 422 or USB follows the property rules, and you ca
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