Can someone explain the differences to me about the RS422 and RS485 protocols? I know RS-485 is 2 wire, and RS-422 is 4 wire (2rx, 2tx). But I need a more solid understanding in simple terms.

From what I found online RS-422 is an old school RS-485 in regards to repeating the signal down the line to the next camera via the tx wires. But also online I saw some stuff about 2 wire RS-422... :?:

I guess my main question is if I have a RS-422 controller am I limited to RS-422 only cameras, or are there adapters or a way to wire in a RS-485 camera?

Thanks

Try these pages for more information.

http://www.rs485.com/pfaq.html

http://www.hw.cz/english/docs/rs485/rs485.html

http://www.bb-elec.com/tech_articles/rs485_basics.asp

Regards:

Dave

thanks.