RS-422 is known for the potential of long-distance data communication at very high reliability. Luckily, with an appropriate adapter/interface circuitry, even a novice can now play with RS-422 and ...

Older RS-485 receiver designs have higher internal power dissipation than newer designs. Figure 2 shows the history of reduction in power-supply current for RS-485 receivers.

Linear Technology's LTM2881 µModule RS-485/422 transceivers provide inductive isolation and incorporate a dc-dc power supply, including the transformer.