Individuals initially started anticipating the downfall of RS-232 in the 1980s. Obviously, RS-232 is still around and kicking. On the off chance that Mark Twain was as yet alive, I’m certain he’d compose something on the request of “The reports of the demise of RS-232 have been enormously overstated”. The RS-arrangement ports remain to a great degree basic in the information procurement and control field.
RS-232 is more established and slower than its 422/423/485 family mates, yet the use of both is still extremely normal. As a genuinely straightforward interface, there is not all that much to consider while determining an RS-arrangement interface, yet a couple words might be all together. In the first place, not every single serial gadget work at a similar speed. Make certain to determine a gadget that will deal with the baud rate of your gadget. Second, for steady and reliable operation, particularly at higher rates, make certain to choose a gadget with a significant FIFO. Take note of that RS-232 ports, and specifically, those on more established gadgets, utilize equipment handshaking signs, for example, “Prepared to Send”, “Clear to Send”.
Numerous more up to date RS-232 interfaces don’t bolster these handshaking signals, so make sure to watch that your serial interface underpins what you require. Another normal arrangement of inquiries emerges while considering the contrasts between RS-422, 423 and 485. RS-422 utilizations a two-wire, completely differential flag interface. RS-423 utilizations the same signal levels, however, utilizes just a single of the two wires. RS-422 and RS-485 are practically indistinguishable. The distinction is that an RS-485 is networkable and can be associated with various serial gadgets. An RS-485 interface will quite often be superbly appropriate for conversing with an RS-422 gadget