Hi,

I want to link some pins of rs232(com1) it is ok?can be problems,something like permanent damage ),in my motherboad manual says that is not ok to place jumpers on some kind of connectors but I found in a site that they can be placed.

thank you

The RS-232 standard specifically says that shorting any RS-232 signal to any other should not cause damage.

Whether motherboard suppliers always comply is another matter. I would "guess" that it's OK, but it's not my motherboard.

If you are shorting things together, I assume you are shorting them at the RS-232 connector or at the end of a cable plugged into the RS-232 connector (the male 9-pin external connector --- or for really, really old computers, the male 25-pin connector), and not shorting signal pins or traces directly on the motherboard.

It is absolutely OK to short any RS-232 output signal to any RS-232 input signal.

So pins 2-3 (RXdata and TXdata) can be connected together. Pins for signals for request-to-send (RTS) and clear-to-send (CTS) can be connected together. Stuff like that.

Shorting two Standards-compliant RS-232 outputs, like RTS and TXdata, together wouldn't accomplish anything useful, so I know you wouldn't deliberately short them. If the motherboard is Standards-compliant, accidentally shorting them together won't cause any permanent damage.


Regards,

Dave