4-20 mA Vs 0-10 V ?
4-20 mA Vs 0-10 V ?
(OP)
Why it is better to use 4-20mA Than 0-10V signal. And friends on what basis 4 and 20 nos have been decided.
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RE: 4-20 mA Vs 0-10 V ?
1. A current loop signal is less susceptible to interference and noise, particularly over longer distances. The transmitter produces a load independant output (within the range of the transmitter) so volt drop is also generally not a problem.
2. The 4mA zero offset allows you to detect failure of the transmitter. With 0-10V, does 0V mean zero measured parameter, or transmitter failed ??
As to why 4-20mA ... who know ??
RE: 4-20 mA Vs 0-10 V ?
4mA was adopted to indicate a quantity zero signal so that if the signal is 0mA it would indicate a fault of some kind.
RE: 4-20 mA Vs 0-10 V ?
RE: 4-20 mA Vs 0-10 V ?