EIA-485 (formerly RS-485 or RS485) is an OSI model physical layer electrical specification of a two-wire, half-duplex, multipoint serial connection. The standard specifies a differential form of signaling. EIA-485 only specifies electrical characteristics of the driver and the receiver.
RS-485 Interface Analysers
We have a range of protocol analysers which will help you monitor and decode RS-485 Interface traffic.