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In industrial engineering applications, a signal range of 4..20mA is often used to communicate a 0..100% value. The base offset of 4mA allows a distinction between the value zero, and an unavailable value (broken wire, etc).

The common 0..10V signal, often supported as an alternative to the superior 4..20mA current signal, does not provide fault detection in this manner.

It is possible that applications of voltage based signals exist, where the minimum voltage is 1V. These systems would also provide fault detection in a manner similar to the 4..20mA current signal.

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12y ago

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