How far will RS422/485 communicate?FAQsRS422/485 can reliably communicate up to 1.2 kilometres (~4000 feet).RS422/485 Adaptors >>Related FAQsRelated ProductsRelated RangeCC - PCI Serial CardsES - Ethernet to SerialPM - Serial PC Card (PCMCIA)PX - PCI Express Serial CardsUC - uPCI Serial CardsUP - uPCI Powered Serial CardsUS - USB to SerialVX - Serial ExpressCardFAQs