serout2 using Open Inverted

[mister_e]

No you don't need to use ON mode, you can use N or T modes without much problems.

Is necessary to put a pull up or pull down resistor?

not really with T or N mode.

Can I to conect the 2 pins of the PIC together and then to the pin2 of DB9 to send to PC? If the 2 PICs send data to PC in same time, what happen?

Some data collision in front I would probably dedicate a PIC to send the data to the PC.

BUT, there's also another option, which would allow you to connect two serial output pins together. What you need to use is a kind of Busy line. This is a line connected between your PIC. This tells that you're actually sending data to the PC.

Start with both PIC output pin set to input, with a pull-up/down (depending of your actual setup), when you want to send some data to the PC, you check the level of the Busy line (0 or 1), if ok(not busy), set this line to busy level, set your Serial output to output, send your data, set that pin to input, release the busy line, and you're done.

Wait a minute... ON mode could be interesting here