4/15/2021 0 Comments 9 Pin Serial Cable Wire Colors
I cut it in half, to find 6 wires inside.Had colored insulators and one was a strand of naked wires.Check your meter by touch the leads on itself, and see if you get what you expect.
If your meter is good, then connect one lead to to a random wire and then slide the other lead across the pins. The DB-9 RS-232 connector just takes the nine most popular pins from the DB-25 connector. 9 Pin Serial Cable Wire Colors Software Implementation OfIn either DB-25 or DB-9 connector, which pins are actually used depends on the hardwaresoftware implementation of the serial protocol. At minimum, for two-way serial communication you need just three pins. If your serial communication is one-way then you might only use two pins: TX RX and GND. Cables that connect only some of the DB-9 serial lines are widely available, though do not assume that the same six pins are connected on all DB-9 cables. Depending on your needs, the six connected pins may or may not be sufficient. For most modern needs (if modern can be used to apply to serial port in 2013) six wires is sufficient. You might hope that signal ground is blackbrown, though often it is green, or some other random color. TX RX are often yellow and green, but again you cannot count on this. The only way to know which color is connect to what pin is to test with a multimeter. For instance, a cable to connect two computers doesnt need the RI (ring indicator) pin; also one of the pairs RTSCTS or DSRDTR may not be connected, since either one or the other is used in most transmission modes. Provide details and share your research But avoid Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. MathJax reference. ![]() Not the answer youre looking for Browse other questions tagged connector rs232 or ask your own question.
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