re protection of serial rs lines laird stable ecn purdue edu kyler laird writes there is at least one optically isolated rs transceiver chip i don t remember where i saw it rs components they exist in australia and the uk don t know about the us have little chips called isolated max and they give you isolated rs from a single v supply external components are caps optoisolators a diode and an isloting transformer they go up to k baud john west for the humour impaired insert a after every third word
