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What does 232,485 or 422 mean in RS 232, RS 485 and RS422?

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mandkesunil

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please tell me this in RS 232, RS422, RS485, RS IS RECOMMENDED STANDARDS THEN WHAT THE NO. INDICATES????? 232/ 422/ 485
 

RS 232, RS 485

these numbers are just denoting different data transfer protocol, like 232 is normal high swing serial interface, mostly found in PC board, and 485 is differential serial interface, mostly used for longer distance data exchange. not sure what 422 is for, you may search google to understand more details about those standards.
 

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