Isolated PLCs
Channel-to-channel digital signal isolation is often required in
PLCs and similar applications where the reference ground of each channel may
be different. Traditional optocouplers, however, degrade
performance by increasing timing parameters such as PWD, propagation delay,
and skew. IL600/IL600A Isolators provide excellent channel-to-channel
isolation with little timing degradation.
In addition to 2,500 Vrms input-to-output withstand
voltage, IL600-Series Isolators provide
outstanding isolation of 400 Vrms between adjacent channels.
With two channels
available in the tiny MSOP footprint, more functionality
can be crammed into a smaller space without sacrificing
channel-to-channel or ground-to-ground isolation.
As this diagram shows, the data line is powered by the signal,
so no input power supply is required:
Application Bulletin: IL600-Series Isolators for Channel-to-Channel
Isolation (.pdf)

IL600-Series Isolator
selector guide

(N. America Only) |
IL600-Series data sheet (.pdf)