485onCAT5?

[falingtrea]

For RS485, the TX and RX pairs should be on seperate twisted pairs (RX and RX* on one pair and TX and TX* on on other pair).

If you parallel two types of line drivers, you need to have some way to disable the RX on each. Otherwise they will fight against each other.

Power over Ethernet does supply power over the same cabel as the signal. so as long as you take in account the voltage drop you should be ok.

[MOUNTAIN747]

For RS485, the TX and RX pairs should be on seperate twisted pairs (RX and RX* on one pair and TX and TX* on on other pair).

If you parallel two types of line drivers, you need to have some way to disable the RX on each. Otherwise they will fight against each other.

Power over Ethernet does supply power over the same cabel as the signal. so as long as you take in account the voltage drop you should be ok.

Thanks Tim for your replay.
I see your point with a problem on RX lines. Looks like more code will be required in any event. I think it will be an easy way out to just bring another RX line (RC5) for the 485 com, share the TX line, and write another routine for 485. A little more brainstorming is in order. Thanks again!

[Cobra_Phil]

Here is a good link describing the wiring schemes.
http://www.infocellar.com/networks/new-tech/PoE/PoE.htm