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These barriers are used to
provide power for loop powered intrinsically safe
transmitters or smoke detectors in the hazardous area. Some models are
also used to isolate and transfer an i.s. current or voltage signal from the
hazardous area to the safe area. Care must be exercised in ensuring that the
power supplied by these barriers does not exceed the maximum safety values
permissible for the field device. These values are shown on the certificate or
seen in the data sheets, both of which can be accessed by clicking on the links.
These barriers often transfer the analogue input from an I.S. field transmitter back to the PLC or
DCS System. Products listed are part of huge range available.