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About ISO-Channel Technology
Figure 43: Common mode voltage is present when different ground potentials exist in your
measurement system.
In many applications, noise is a fact and a common occurrence. To prevent this noise from
entering the signal path, the signal must be isolated on a channel-to-channel basis as well as
from the PC ground reference.
Technology breakthroughs now allow channel-to-channel isolation to be accomplished
effectively. Using an A/D per channel with a DC-DC converter for each A/D allows each
signal input channel to be isolated from one another (see
Figure
44). With this individual
isolation per channel, each input channel can now "float" to its own ground reference.
Separate channels are then effectively isolated from each other by the isolation barrier, up to
±500 V for each channel. Now any noise or common mode voltage to that level is eliminated
from the system measurement, allowing pristine results from each sensor without any
interaction from any other sensor.
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